Wyniki wyszukiwania dla: FRICTION INDUCED VIBRATION

• Friction induced vibrations in sliding of monolithic alumina

  Publikacja

  • J. Łubiński
  • K. Druet

  - Rok 2005

  Przedstawiono wyniki badań wzbudzania się (i ewentualnie - zaniku) drgań mechanicznych towarzyszących tarciu ślizgowemu próbek o płaskiej powierzchni styku, wykonanych z monolitycznego tlenku aluminium. Badano wpływ wymuszeń tribologicznych oraz dynamicznych cech układu badawczego na przebieg zjawiska.

• Sliding friction of alumina (Al2O3) with friction induced vibrations

  Dane Badawcze

  open access

  • J. Łubiński

  Test files containing data on experiments in self mated sliding contact of alumina Al2O3 lubricated with either water or paraffin oil. Tests run in variable load/velocity conditions and with different dynamic settings of the test rig (PT-3 tribometer). The aim of the research was to attempt in finding correlations between the dynamic characteristics...

• The Application of Vibration Recording and Analysis in Tribological Research on Sliding Friction

  Publikacja

  • J. Łubiński
  • K. Druet

  - Rok 2018

  The paper reports on a tribological research on the macroscopic manifestation and characteristics of sliding friction. The aim of the task was to measure friction in lubricated sliding contacts and test the interactions between the environment (the test rig) and the experimental friction contact. Friction-induced vibrations were observed and studied as a manifestation of the process. The typical set of velocity and force/torque...

• Friction-Induced Oscillations of a Non-Asbestos Organic Pin Sliding on a Steel Disc

  Publikacja

  • O. Nosko
  • T. Nagamine
  • H. Mori
  • Y. Sato

  - Acta Mechanica et Automatica - Rok 2015

  Friction-induced oscillations result in deterioration of performance of disc brakes and are generally undesired. We conduct experimental study of friction-induced oscillations in a non-asbestos organic material / steel pair used in disc brakes of motor vehicles. The tests are done by use of a pin-on-disc machine which has the pin sample supported on a deformable beam. The adjustable friction parameters are the disc velocity, contact...

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• VIBRATION PROBLEMS OF AN EXAMPLE OF TEMPORARY STEEL GRANDSTAND UNDER HUMAN-INDUCED EXCITATION

  Publikacja

  • N. Lasowicz
  • R. Jankowski

  - Civil and Environmental Engineering Reports - Rok 2015

  Lighter and slender structural members of a typical grandstand leads to a significant reduction in the frequencies, that is why such structures are more easily induced to vibrations. The aim of the present paper is to show the results of our experimental studies and the numerical analyses, focused on the behaviour of a part of a typical temporary steel grandstand under dynamic loads. The peak values of accelerations of a steel...

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• Non-Destructive Testing of a Sport Tribune under Synchronized Crowd-Induced Excitation Using Vibration Analysis

  Publikacja

  • K. Grębowski
  • M. Rucka
  • K. Wilde

  - Materials - Rok 2019

  This paper presents the concept of repairing the stand of a motorbike speedway stadium. The synchronized dancing of fans cheering during a meeting brought the stand into excessive resonance. The main goal of this research was to propose a method for the structural tuning of stadium stands. Non-destructive testing by vibration methods was conducted on a selected stand segment, the structure of which recurred on the remaining stadium...

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• Characterization of Corrosion-Induced Fracture in Reinforced Concrete Beams Using Electrical Potential, Ultrasound and Low-Frequency Vibration

  Publikacja

  • T. Ferenc
  • E. Wojtczak
  • B. Meronk
  • J. Ryl
  • K. Wilde
  • M. Rucka

  - JOURNAL OF NONDESTRUCTIVE EVALUATION - Rok 2024

  The paper deals with the non-destructive experimental testing of the reinforced concrete beams under progressive corrosion. A series of experiments using electrical potential, ultrasound and low-frequency vibrations techniques are reported. Electrical potential and natural frequencies were used to characterise and monitor the corrosion process at its initial state. The P-wave velocity measurements were proved to be effective in...

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• VIbration monitoring in reciprocating siding friction tests. Ball-on-flat contact. Sintered alumina ceramics (98%). No lubrication (DRY). Specim. set K05

  Dane Badawcze

  open access

  • J. Łubiński
  • K. Druet

  - seria: Wear in reciprocating siding friction tests. Ball-on-flat contact. Sintered alumina ceramics (98%).

  VIbration monitoring in reciprocating siding friction tests in ball-on-flat contact. Both specimens made of sintered alumina ceramics (98%) - self-mated contact.Linear reciprocating motion.Lubrication: DRY. Sliding velocity (peak): 0.1 m/s. Load (normal force): 5N. Test rig: TPZ-1 Tribometer.Running time: progressive increments of 10, 15, 30, 60, 180...

• VIbration monitoring in reciprocating siding friction tests. Ball-on-flat contact. Sintered alumina ceramics (98%). No lubrication (DRY). Specim. set K03

  Dane Badawcze

  open access

  • J. Łubiński
  • K. Druet

  - seria: Wear in reciprocating siding friction tests. Ball-on-flat contact. Sintered alumina ceramics (98%).

  VIbration monitoring in reciprocating siding friction tests in ball-on-flat contact. Both specimens made of sintered alumina ceramics (98%) - self-mated contact.Linear reciprocating motion.Lubrication: DRY. Sliding velocity (peak): 0.1 m/s. Load (normal force): 5N. Test rig: TPZ-1 Tribometer.Running time: progressive increments of 10, 15, 30, 60, 180...

• VIbration monitoring in reciprocating siding friction tests. Ball-on-flat contact. Sintered alumina ceramics (98%). No lubrication (DRY). Specim. set K04

  Dane Badawcze

  open access

  • J. Łubiński
  • K. Druet

  - seria: Wear in reciprocating siding friction tests. Ball-on-flat contact. Sintered alumina ceramics (98%).

  VIbration monitoring in reciprocating siding friction tests in ball-on-flat contact. Both specimens made of sintered alumina ceramics (98%) - self-mated contact.Linear reciprocating motion.Lubrication: DRY. Sliding velocity (peak): 0.1 m/s. Load (normal force): 5N. Test rig: TPZ-1 Tribometer.Running time: progressive increments of 10, 15, 30, 60, 180...

• VIbration monitoring in reciprocating siding friction tests. Ball-on-flat contact. Sintered alumina ceramics (98%). No lubrication (DRY). Specim. set K01

  Dane Badawcze

  open access

  • J. Łubiński
  • K. Druet

  - seria: Wear in reciprocating siding friction tests. Ball-on-flat contact. Sintered alumina ceramics (98%).

  VIbration monitoring in reciprocating siding friction tests in ball-on-flat contact. Both specimens made of sintered alumina ceramics (98%) - self-mated contact.Linear reciprocating motion.Lubrication: DRY. Sliding velocity (peak): 0.1 m/s. Load (normal force): 5N. Test rig: TPZ-1 Tribometer.Running time: progressive increments of 10, 15, 30, 60, 180...

• VIbration monitoring in reciprocating siding friction tests. Ball-on-flat contact. Sintered alumina ceramics (98%). Lubricant - PARAFFIN OIL. Specim. set K08

  Dane Badawcze

  open access

  • J. Łubiński
  • K. Druet

  - seria: Wear in reciprocating siding friction tests. Ball-on-flat contact. Sintered alumina ceramics (98%).

  VIbration monitoring in reciprocating siding friction tests in ball-on-flat contact. Both specimens made of sintered alumina ceramics (98%) - self-mated contact.Linear reciprocating motion.Lubrication: PARAFFIN OIL. Sliding velocity (peak): 0.1 m/s. Load (normal force): 5N. Test rig: TPZ-1 Tribometer.Running time: progressive increments of 10, 15, 30,...

• VIbration monitoring in reciprocating siding friction tests. Ball-on-flat contact. Sintered alumina ceramics (98%). Lubricant - DISTILLED WATER. Specim. set K02

  Dane Badawcze

  open access

  • J. Łubiński
  • K. Druet

  - seria: Wear in reciprocating siding friction tests. Ball-on-flat contact. Sintered alumina ceramics (98%).

  VIbration monitoring in reciprocating siding friction tests in ball-on-flat contact. Both specimens made of sintered alumina ceramics (98%) - self-mated contact.Linear reciprocating motion.Lubrication: DISTILLED WATER. Sliding velocity (peak): 0.1 m/s. Load (normal force): 5N. Test rig: TPZ-1 Tribometer.Running time: progressive increments of 10, 15,...

• VIbration monitoring in reciprocating siding friction tests. Ball-on-flat contact. Sintered alumina ceramics (98%). Lubricant - DISTILLED WATER. Specim. set K06

  Dane Badawcze

  open access

  • J. Łubiński
  • K. Druet

  - seria: Wear in reciprocating siding friction tests. Ball-on-flat contact. Sintered alumina ceramics (98%).

  VIbration monitoring in reciprocating siding friction tests in ball-on-flat contact. Both specimens made of sintered alumina ceramics (98%) - self-mated contact.Linear reciprocating motion.Lubrication: DISTILLED WATER. Sliding velocity (peak): 0.1 m/s. Load (normal force): 5N. Test rig: TPZ-1 Tribometer.Running time: progressive increments of 10, 15,...

• VIbration monitoring in reciprocating siding friction tests. Ball-on-flat contact. Sintered alumina ceramics (98%). Lubricant - DISTILLED WATER. Specim. set K07

  Dane Badawcze

  open access

  • J. Łubiński
  • K. Druet

  - seria: Wear in reciprocating siding friction tests. Ball-on-flat contact. Sintered alumina ceramics (98%).

  VIbration monitoring in reciprocating siding friction tests in ball-on-flat contact. Both specimens made of sintered alumina ceramics (98%) - self-mated contact.Linear reciprocating motion.Lubrication: DISTILLED WATER. Sliding velocity (peak): 0.1 m/s. Load (normal force): 5N. Test rig: TPZ-1 Tribometer.Running time: progressive increments of 10, 15,...

• VIbration monitoring in reciprocating siding friction tests. Ball-on-flat contact. Sintered alumina ceramics (98%). Lubricant - PARAFFIN OIL. Specim. set K09A - full-run

  Dane Badawcze

  open access

  • J. Łubiński
  • K. Druet

  - seria: Wear in reciprocating siding friction tests. Ball-on-flat contact. Sintered alumina ceramics (98%).

  VIbration monitoring in reciprocating siding friction tests in ball-on-flat contact. Both specimens made of sintered alumina ceramics (98%) - self-mated contact.Linear reciprocating motion.Lubrication: PARAFFIN OIL. Sliding velocity (peak): 0.1 m/s. Load (normal force): 5N. Test rig: TPZ-1 Tribometer.Running time: progressive increments of 10, 15, 30,...

• VIbration monitoring in reciprocating siding friction tests. Ball-on-flat contact. Sintered alumina ceramics (98%). Lubricant - PARAFFIN OIL. Specim. set K09 - pre-run

  Dane Badawcze

  open access

  • J. Łubiński
  • K. Druet

  - seria: Wear in reciprocating siding friction tests. Ball-on-flat contact. Sintered alumina ceramics (98%).

  VIbration monitoring in reciprocating siding friction tests in ball-on-flat contact. Both specimens made of sintered alumina ceramics (98%) - self-mated contact.Linear reciprocating motion.Lubrication: PARAFFIN OIL. Sliding velocity (peak): 0.1 m/s. Load (normal force): 5N. Test rig: TPZ-1 Tribometer.Running time: progressive increments of 10, 15, 30,...

• Dynamics Conscious Approach to Tribometer Design and Tribo-testing

  Publikacja

  • J. Łubiński
  • S. Grymek
  • K. Druet
  • H. Olszewski

  - Key Engineering Materials - Rok 2012

  In the paper findings are discussed on the issue of dynamic characteristics of a tribometer as a factor influencing the result of the tribological experiment. An advanced approach to tribo-testing is attempted with integrated dynamic analysis of the tribometer and the sliding pair. The fundamental idea is explored of the tribometer being regarded as any machine in which friction is inflicted with all the resulting consequences...

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• Wpływ wybranych właściwości maszyny badawczej na wynik eksperymentu tribologicznego z tarciem ślizgowym

  Publikacja

  • J. Łubiński

  - Rok 2017

  Niniejsza monografia stanowi podsumowanie przekrojowych badań związanych z wpływem właściwości stanowiska badawczego (tribometru) na przebieg i rejestrowane wyniki eksperymentu tribologicznego z tarciem ślizgowym ciał stałych smarowanych cieczą w warunkach tarcia bez efektów smarowania hydrodynamicznego. Autor przedstawia wyniki kompleksowych analiz właściwości dynamicznych stanowiska badawczego w kontekście efektów obserwowanych...

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• Adaptation of the arbitrary Lagrange–Euler approach to fluid–solid interaction on an example of high velocity flow over thin platelet

  Publikacja

  • P. J. Ziółkowski
  • T. Ochrymiuk
  • V. Eremeev

  - CONTINUUM MECHANICS AND THERMODYNAMICS - Rok 2019

  The aim of this study is to analyse the behaviour of a thin plate with air flow velocities of 0.3–0.9 Ma. Data from the experiment and numerical tools were used for the analysis. For fluid–solid interaction calculations, the arbitrary Lagrange–Euler approach was used. The results of the measurements are twofold. The first one is the measurement of the flow before and after vibrating plate, i.e. pure flow plate, and the second consists...

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• Vibration signals collected for concrete beams with GFRP reinforcement subjected to elevated temperatures (120C-240C)

  Dane Badawcze

  open access

  • B. Zima

  The dataset contains the time domain signals obtained during dynamic tests of concrete beams reinforced with GFRP bars. The vibration were induced with the use of modal hammer, while the signals were collected by the accelerometers attached at the beam surface. The signals were captured before and after subjecting the concrete beams to elevated temperatures.

• DLC coating in ring-on-ring sliding with water lubrication 10MPa/0.1m/s

  Dane Badawcze

  open access

  • A. Neyman
  • J. Łubiński
  • A. Olszewski
  • K. Druet

  Wear tests in sliding friction of DLC coating on 1.4021 (EN 10088-1) heat treated stainless steel. Ring - on - ring contact in unidirectional sliding, DLC-W over DLC-W. Mean contact stress: 10MPa. Sliding velocity: 0,1 m/s. Mean friction radius: 9.5mm. Lubricant: WATER. Tribometer: PT-3. Overall test time >15h. The test was augmented by vibration...

• DLC coating in ring-on-ring sliding with saline solution (0.9% wt.) lubrication 20MPa/0.1m/s

  Dane Badawcze

  open access

  • A. Neyman
  • J. Łubiński
  • A. Olszewski
  • K. Druet

  Wear tests in sliding friction of DLC coating on 1.4021 (EN 10088-1) heat treated stainless steel. Ring - on - ring contact in unidirectional sliding, DLC-W over DLC-W. Mean contact stress: 20MPa. Sliding velocity: 0,1 m/s. Mean friction radius: 9.5mm. Lubricant: SALINE SOLUTION (0.9% wt.). Tribometer: PT-3. Overall test time >15h. The test was augmented...

• DLC coating in ring-on-ring sliding with saline solution (0.9% wt.) lubrication 10MPa/0.1m/s

  Dane Badawcze

  open access

  • A. Neyman
  • J. Łubiński
  • A. Olszewski
  • K. Druet

  Wear tests in sliding friction of DLC coating on 1.4021 (EN 10088-1) heat treated stainless steel. Ring - on - ring contact in unidirectional sliding, DLC-W over DLC-W. Mean contact stress: 10MPa. Sliding velocity: 0,1 m/s. Mean friction radius: 9.5mm. Lubricant: SALINE SOLUTION (0.9% wt.). Tribometer: PT-3. Overall test time >15h. The test was augmented...

• DLC coating in ring-on-ring sliding with water lubrication 20MPa/0.1m/s

  Dane Badawcze

  open access

  • A. Neyman
  • J. Łubiński
  • A. Olszewski
  • K. Druet

  Wear tests in sliding friction of DLC coating on 1.4021 (EN 10088-1) heat treated stainless steel. Ring - on - ring contact in unidirectional sliding, DLC-W over DLC-W. Mean contact stress: 20MPa. Sliding velocity: 0,1 m/s. Mean friction radius: 9.5mm. Lubricant: WATER. Tribometer: PT-3. Overall test time >15h. The test was augmented by vibration...

• DLC coating doped with W in ring-on-ring sliding with water lubrication 20MPa/0.1m/s

  Dane Badawcze

  open access

  • A. Neyman
  • J. Łubiński
  • A. Olszewski
  • K. Druet

  Wear tests in sliding friction of 1% W (tungsten) doped DLC coating on 1.4021 (EN 10088-1) heat treated stainless steel. Ring - on - ring contact in unidirectional sliding, DLC-W over DLC-W. Mean contact stress: 20MPa. Sliding velocity: 0,1 m/s. Mean friction radius: 9.5mm. Lubricant: WATER. Tribometer: PT-3. Overall test time >15h. The test was...

• DLC coating doped with W in ring-on-ring sliding with water lubrication 10MPa/0.1m/s

  Dane Badawcze

  open access

  • A. Neyman
  • J. Łubiński
  • A. Olszewski
  • K. Druet

  Wear tests in sliding friction of 1% W (tungsten) doped DLC coating on 1.4021 (EN 10088-1) heat treated stainless steel. Ring - on - ring contact in unidirectional sliding, DLC-W over DLC-W. Mean contact stress: 10MPa. Sliding velocity: 0,1 m/s. Mean friction radius: 9.5mm. Lubricant: WATER. Tribometer: PT-3. Overall test time >15h. The test was...

• DLC coating doped with W in ring-on-ring sliding with saline solution (0.9% wt.) lubrication 20MPa/0.1m/s

  Dane Badawcze

  open access

  • A. Neyman
  • J. Łubiński
  • A. Olszewski
  • K. Druet

  Wear tests in sliding friction of 1% W (tungsten) doped DLC coating on 1.4021 (EN 10088-1) heat treated stainless steel. Ring - on - ring contact in unidirectional sliding, DLC-W over DLC-W. Mean contact stress: 20MPa. Sliding velocity: 0,1 m/s. Mean friction radius: 9.5mm. Lubricant: SALINE SOLUTION (0.9% wt.). Tribometer: PT-3. Overall test time >15h....

• DLC coating doped with W in ring-on-ring sliding with saline solution (0.9% wt.) lubrication 10MPa/0.1m/s

  Dane Badawcze

  open access

  • A. Neyman
  • J. Łubiński
  • A. Olszewski
  • K. Druet

  Wear tests in sliding friction of 1% W (tungsten) doped DLC coating on 1.4021 (EN 10088-1) heat treated stainless steel. Ring - on - ring contact in unidirectional sliding, DLC-W over DLC-W. Mean contact stress: 10MPa. Sliding velocity: 0,1 m/s. Mean friction radius: 9.5mm. Lubricant: SALINE SOLUTION (0.9% wt.). Tribometer: PT-3. Overall test time >15h....

• Experimental and Numerical Study on Dynamics of Two Footbridges with Different Shapes of Girders

  Publikacja

  • A. Banaś
  • R. Jankowski

  - Applied Sciences-Basel - Rok 2020

  The paper presents the experimental and numerical results of the dynamic system identification and verification of the behavior of two footbridges in Poland. The experimental part of the study involved vibration testing under different scenarios of human-induced load, impulse load, and excitations induced by vibration exciter. Based on the results obtained, the identification of dynamic parameters of the footbridges was performed...

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• Contact with coupled adhesion and friction: Computational framework, applications, and new insights

  Publikacja

  • J. C. Mergel
  • J. Scheibert
  • R. Sauer

  - JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS - Rok 2021

  Contact involving soft materials often combines dry adhesion, sliding friction, and large deformations. At the local level, these three aspects are rarely captured simultaneously, but included in the theoretical models by Mergel et al., (2019). We here develop a corresponding finite element framework that captures 3D finite-strain contact of two deformable bodies. This framework is suitable to investigate sliding friction even...

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• DYNAMIC RESPONSE OF FORUM GDANSK STRUCTURE DUE TO RAIL TRAFFIC

  Publikacja

  • M. Miśkiewicz
  • Ł. Pyrzowski
  • M. Rucka
  • K. Wilde
  • J. Chróścielewski

  - Archives of Civil Engineering - Rok 2017

  The paper presents the study of the impact of vibration induced by the movement of the railway rolling stock on the Forum Gdańsk structure. This object is currently under construction and is located over the railway tracks in the vicinity of the Gdańsk Główny and Gdańsk Śródmieście railway stations. The analysis covers the influence of vibrations on the structure itself and on the people within. The in situ measurements on existing...

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• Tribo-Environment Dependent Chemical Modification of Sliding Interfaces in Ultrananocrystalline Diamond Nanowall Film: A Correlation with Friction and Wear

  Publikacja

  • R. Rani
  • K. Panda
  • N. Kumar
  • S. Kamatchi
  • R. Pandian
  • M. Ficek
  • R. Bogdanowicz
  • K. Haenen
  • I. Lin

  - Journal of Physical Chemistry C - Rok 2018

  Tribological properties of ultrananocrystalline diamond nanowall (UNCD NW) films were investigated quantitatively in three different and controlled tribo-environmental conditions, proposing the passivation and graphitization mechanisms. However, these mechanisms are rather complicated and possibly can be understood in well-controlled tribological conditions. It was shown that the friction and wear of these films were high in highPage 1...

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• The Idea of Using Bayesian Networks in Forecasting Impact of Traffic-Induced Vibrations Transmitted through the Ground on Residential Buildings

  Publikacja

  • A. Siemaszko
  • A. Jakubczyk-Gałczyńska
  • R. Jankowski

  - Geosciences - Rok 2019

  Traffic–induced vibrations may constitute a considerable load to buildings. In this paper, vibrations transmitted through the ground caused by wheeled vehicles are considered. This phenomenon may cause cracking of plaster, cracks in load-bearing elements or even, in extreme cases, collapse of the whole structure. Measurements of vibrations of real structures are costly and laborious. Therefore, the aim of the present paper is to...

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• Numerical analysis of a temporary steel grandstand

  Publikacja

  • N. Lasowicz
  • R. Jankowski

  - Rok 2014

  The purpose of this paper is to present the results of the numerical analysis focused on the response of the temporary steel scaffolding grandstand subjected to human-induced vibrations due to jumping. Shell as well as beam elements have been used in the numerical model. Its first stage has involved conducting modal analysis in order to determine the modes of free vibrations and the corresponding natural frequencies for the empty...

• Experimental study on earthquake-induced pounding between steel structures

  Publikacja

  • B. Sołtysik
  • R. Jankowski

  - ce/papers - Rok 2023

  Pounding between adjacent structures has been repeatedly observed during major earthquakes. The phenomenon may cause some local damage at the points of interactions, it may also lead to substantial destruction, permanent deformations or total collapse of colliding structures. The effects of earthquake-induced structural pounding have been studied for more than three decades now. However, most of the studies concerned masonry as...

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• Mode shapes of a beam and plate with defects, obtained by experimental modal analysis

  Dane Badawcze

  open access

  • M. Rucka
  • K. Wilde

  The DataSet contains the experimental results of the first mode shape for a beam and a plate.

• Analiza drgań przewodu jezdnego sieci trakcyjnej w aspekcie oceny jej stanu technicznego.

  Publikacja

  • K. Karwowski
  • M. Michna
  • M. Mizan
  • A. Wilk

  - Logistyka - Rok 2015

  Górna sieć trakcyjna jest nadal najefektywniejszym sposobem zasilania kolejowych pojazdów elektrycznych. Sieć jezdna nie ma możliwości technicznych redundancji, co wymaga okresowej oceny stanu technicznego w celu zapewnienia prawidłowej współpracy z odbierakami prądu pojazdów. W artykule przedstawiono aspekty oceny stanu technicznego górnej sieci trakcyjnej na podstawie modelowania matematycznego i wybranych badań laboratoryjnych....

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• CPTU/DMT control of heavy tamping compaction of sands

  Publikacja

  • N. Kurek
  • L. Bałachowski

  - Rok 2015

  Heavy tamping compaction method in cohesionless alluvial soil was evaluated with CPTU and DMT tests. Some examples of interpretation of soundings in pre-treated and compacted sands are given. The compaction work was performed in two stages. Compaction control was performed after each stage of tamping. Additional tests were performed two weeks after the compaction works completion to study the set-up effect. While typical increase...

• Multi Parameter Sliding Test Result Evaluation for The Selection of Material Pair for Wear Resistant Components of a Hydraulic motor Dedicated for Use With Environmentally Friendly Working Fluids

  Publikacja

  • J. Łubiński
  • P. Śliwiński

  - Solid State Phenomena - Rok 2015

  In the paper the method and results are presented of the testing of tribological performance of a number of hard materials available commercially. The tests consisted in unidirectional sliding with liquid lubrication. The load and velocity regime chosen were similar to a standard four-ball lubricity test with constant velocity and load increasing over time. The regime was modified in such a way that over the initial part of the...

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• Effect of Simultaneous Valve Closures in Hydraulic Piping Systems

  Publikacja

  • K. Urbanowicz
  • I. Haluch
  • A. Bergant
  • A. Deptuła
  • P. Śliwiński

  - Rok 2023

  The paper investigates wave interference (between pressure waves) occurring in simple hydraulic systems. Water hammer was induced by simultaneous closure of three valves located at the reservoirs of a “Y” type hydraulic system. Numerical simulations were carried out with the help of the freeware computer package Allievi enabling the reader to replicate results in a direct manner. The influence of the following quantities has been...

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• Focused ion beam-based microfabrication of boron-doped diamond single-crystal tip cantilevers for electrical and mechanical scanning probe microscopy

  Publikacja

  • E. Gacka
  • P. Kunicki
  • A. Sikora
  • R. Bogdanowicz
  • M. Ficek
  • T. Gotszalk
  • I. W. Rangelow
  • K. Kwoka

  - MEASUREMENT - Rok 2022

  In this paper, the fabrication process and electromechanical properties of novel atomic force microscopy probes utilising single-crystal boron-doped diamond are presented. The developed probes integrate scanning tips made of chemical vapour deposition-grown, freestanding diamond foil. The fabrication procedure was performed using nanomanipulation techniques combined with scanning electron microscopy and focused ion beam technologies....

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• Analysis of unsteady flow forces on the thermowell of steam temperature sensor

  Publikacja

  • S. Kornet
  • D. Sławiński
  • P. Ziółkowski
  • J. Badur

  - Transactions of the Institute of Fluid-Flow Machinery - Rok 2015

  In this paper, 3D numerical analysis of unsteady flow forces acting on the measuring sheath of steam temperature is presented. According to that purpose, the CFD (Computation Fluid Dynamic [1]) approach has been used. The nonstationary of fluid acting on the measuring sheath such as: Strouhal frequency, amplitude of pressure, structure of vortex, peak of pressure, field of pressure, field of velocity etc. are studied analytically...

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• Analiza drgań kładki kompozytowej wywołanych działaniem wiatru

  Publikacja

  • B. Sobczyk
  • J. Chróścielewski
  • W. Witkowski

  - Biuletyn Wojskowej Akademii Technicznej - Rok 2015

  W pracy omówiono sposób przeprowadzenia uproszczonej, numerycznej analizy drgań kładki kompozytowej wywołanych działaniem wiatru. Rozważaniom poddano swobodnie podpartą konstrukcję o rozpiętości 16 m i przekroju w kształcie litery U. W pierwszej kolejności przeprowadzono dwuwymiarową analizę opływu niepodatnego kształtu przekroju kładki w poziomym strumieniu wiatru o prędkości 10 m/s. Obliczenia numeryczne przeprowadzono programem...

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• Fawad Ahmed PhD Scholar

  Osoby

  I am Ph.D. Scholar in Faculty of Mechanical Engineering at Gdansk University of Technology, Poland. My research focuses on improving the thermal management of batteries that are used in Electric Vehicles.  I received my MS in Thermal Energy Engineering from the National University of Sciences and Technology, Pakistan. My MS thesis was related to the application of thermal energy storage systems for space heating. I tried to improve...

• The new concept of capillary forces aided evaporator for application in domestic organic rankine cycle

  Publikacja

  • D. Mikielewicz
  • P. Szymański
  • K. Błauciak
  • J. Wajs
  • J. Mikielewicz
  • E. Ihnatowicz

  - INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER - Rok 2010

  This paper presents studies on the possibility of applying capillary forces induced in the porous structure to a modern design of evaporator. The potential application of such heat exchanger is for example an evaporator of the domestic micro combined heat and power (CHP) unit. One of the problems in the micro-CHP is excessive demand for pumping power. The proposed design helps in overcoming that issue. In the evaporator outlined...

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• Experimental study on the feasibility of alternative materials for tilting pad thrust bearings operating in transition to mixed friction

  Publikacja

  • M. Wasilczuk
  • M. Wodtke

  - Friction - Rok 2024

  In hydrodynamic bearings traditional bearing alloys: Babbitts and bronzes are most frequently utilized. Polymer sliding layers are sometimes applied as a valuable alternative. Hard diamond-like carbon (DLC) coatings, which are also considered for certain applications may show some advantages, as well. Although material selection is of secondary importance in a full film lubrication regime it becomes important in mixed friction...

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• Building damage due to structural pounding during earthquakes

  Publikacja

  • B. Sołtysik
  • R. Jankowski

  - Journal of Physics : Conference Series - Rok 2015

  Earthquake-induced pounding between adjacent buildings has been identified as one of the reasons for substantial damage or even total collapse of colliding structures. A major reason leading to interactions in buildings results from the differences in their dynamic parameters and also from insufficient distance between the structures. Although the research on structural pounding has been much advanced, the studies have mainly been...

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• JOURNAL OF SOUND AND VIBRATION

  Czasopisma

  ISSN: 0022-460X , eISSN: 1095-8568

• Tobacco Induced Diseases

  Czasopisma

  ISSN: 1617-9625