Search results for: ambient vibrations

• Vibrations in Physical Systems

  Journals

  ISSN: 0860-6897

• JOURNAL OF SOUND AND VIBRATION

  Journals

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

• Span's low damped vibrations and vibration's damping by modal disparity inducted by cable stays temporal addition

  Publication

  • K. Lipiński

  - Year 2008

  W pracy przedstawiono problem obecności słabo tłumionych drgań przęseł mostów wraz z metodą ich aktywnego tłumienia. Badania przeprowadzono korzystając z analizy numerycznej. Analizowany mechanizm zamodelowano korzystając z metody elementów skończonych. W praco przedstawiono zwarty opis wykorzystanej metody. Następnie, zbudowano dwa alternatywne modele, różniące się liczbą odciągów usztywniających przęsło. Wyznaczono postaci i...

• Ambient vibrations - footbridge over the Kolibkowski Stream in Gdynia, span P2

  Open Research Data

  open access

  • A. Banaś

  Ambient vibration tests carried out on the P2 span of the footbridge over the Kolibkowski Stream. The research was carried out using a set of 14 acceleration sensors - MEMS accelerometers TE 4332M3-002 and TE 4312M3-002, which allowed for simultaneous measurement and recording of 20 acceleration channels. These sensors are characterized by a natural...

• Ambient vibrations - footbridge over the Kolibkowski Stream in Gdynia, span P3

  Open Research Data

  open access

  • A. Banaś

  Ambient vibration tests carried out on the P3 span of the footbridge over the Kolibkowski Stream. The research was carried out using a set of 14 acceleration sensors - MEMS accelerometers TE 4332M3-002 and TE 4312M3-002, which allowed for simultaneous measurement and recording of 20 acceleration channels. These sensors are characterized by a natural...

• Vibration

  Journals

  eISSN: 2571-631X

• The Fate of BTEX Compounds in Ambient Air

  Publication

  • M. Słomińska
  • P. Konieczka
  • J. Namieśnik

  - CRITICAL REVIEWS IN ENVIRONMENTAL SCIENCE AND TECHNOLOGY - Year 2014

  As a result of the industrialization and urbanization in the world, human pressure on the environment is intensifying, leading to detrimental changes in both biotic and abiotic compartments. One of the many consequences of this state of affairs is the increasing rate of emission into the atmosphere of volatile organic compounds, including the so-called BTEX (benzene, ethylbenzene, toluene, xylenes) compounds. The authors review...

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• SHOCK AND VIBRATION

  Journals

  ISSN: 1070-9622 , eISSN: 1875-9203

• Review of the determination of pesticide residues in ambient air

  Publication

  • M. Kosikowska
  • M. Biziuk

  - TRAC-TRENDS IN ANALYTICAL CHEMISTRY - Year 2010

  W publikacji dokonano przeglądu najważniejszych metodyk oznaczania pozostałości pestycydów w powietrzu zewnętrznym. W publikacji przedstawiono także techniki używane do oznaczeń końcowych. Obecnie najpopularniejszą techniką oznaczeń końcowych jest chromatografia gazowa bądź cieczowa sprzężona ze spektrometrem mas.

• Environmental fate of BTEX compounds in ambient air

  Publication

  • M. Słomińska
  • P. Konieczka
  • J. Namieśnik

  - CRITICAL REVIEWS IN ENVIRONMENTAL SCIENCE AND TECHNOLOGY - Year 2012

  As a result of the industrialization and urbanization in the world, human pressure on the environment is intensifying, leading to detrimental changes in both biotic and abiotic compartments. One of the many consequences of this state of affairs is the increasing rate of emission into the atmosphere of volatile organic compounds, including the so-called BTEX (benzene, ethylbenzene, toluene, xylenes) compounds. The article reviews...

• Ambient Science

  Journals

  ISSN: 2348-5191 , eISSN: 2348-8980

• Advances in Vibration Engineering

  Journals

  ISSN: 0972-5768

• SOUND AND VIBRATION

  Journals

  ISSN: 1541-0161

• Chemical instability of the cobalt oxyhydrate superconductor under ambient conditions

  Publication

  • M. Foo
  • R. Schaak
  • V. Miller
  • T. Klimczuk
  • N. Rogado
  • Y. Wang
  • G. Lau
  • C. Craley
  • H. Zandbergen
  • N. Ong... and 2 others

  - SOLID STATE COMMUNICATIONS - Year 2003

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• Cold Start Emissions Investigation at Different Ambient Temperature Conditions

  Publication

  • P. Bielaczyc
  • J. Merkisz

  - Year 1998

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• Determination of ability of hydrotronic systems to start in low ambient temperatures

  Publication

  • R. Jasiński

  - Solid State Phenomena - Year 2010

  Przedstawiono wyniki badań symulacji komputerowej zespołów układów hydrotronicznych w warunkach szoku termicznego. Pokazano metodę określania zdatności hydrotronicznych zespołów i układów podczas rozruchu w warunkach szoku termicznego.

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• Influence of design of hydraulic components on their operation in low ambient temperatures

  Publication

  • R. Jasiński

  - Key Engineering Materials - Year 2012

  W artykule przestawiono wpływ konstrukcji zespołów hydraulicznych na ich działanie w niskich temperaturach otoczenia.

• Modelling of vibrations of a liquid filled tank

  Publication

  • K. Trębacki

  - Polish Maritime Research - Year 2008

  Przeprowadzono analizę teoretyczną i numeryczną zbiorników długich i krótkich wypełnionych całkowicie lub częściowo cieczą. Wyznaczenie obciążeń hydrodynamicznych dotyczy bezpośrednio wytrzymałości konstrukcji samego zbiornika, a przez to pozwala określić wytrzymałość konstrukcyjną całego kadłuba. Szczególne wymagania stawiane są zbiornikom do przewozu cieczy radioaktywnych, gdyż należy zapewnić bardzo wysoki stopień bezpieczeństwa...

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• Circular saw vibrations or dynamics of the spindle

  Publication

  • R. Wasielewski
  • K. Orłowski
  • J. Sandak

  - Year 2009

  Sawing of wood with circular saws is a typical example of cutting with multi-blade tools. In that kind of cutting, theposition accuracy of following tool blades is a crucial factor which affects the cutting process and machining final effects.Position tooth errors may cause deterioration in cutting conditions, changes in loads of individual teeth and the tool as a whole,and also a decrease in accuracy and surface quality after...

• Modes of vibrations occuring in the washboarding phenomenon

  Publication

  • K. Orłowski

  - Annals of WULS, Forestry and Wood Technology - Year 2003

  W oparciu o współczesną literaturę oraz wyniki badań własnych przedstawiono teorie zjawiska washboarding dla obróbki na pilarkach taśmowych z użyciem wąskich i szerokich pił. Zaprezentowano również wytłumaczenie wspomnianego zjawiska dla przypadku obróbki na pilarkach ramowych. Poprzez analogię do drgań typu chatter (drgania samowzbudne w obróbce metali) zaproponowano nazwy regenerative washboarding, dla drgań samowzbudnych na...

• The analysis of mechanical vibrations with use of the MATHCAD.

  Publication

  • T. Kucharski

  - Year 2004

  Przedstawiono zagadnienie analizy drgań mechanicznych ze wspomaganiem komputerowym za pomocą programu MATHCAD. Omówiono zagadnienia zastosowania programu w edukacji i w obliczeniach inżynierskich.

• Mode vibrations of plates – experimental analysis

  Publication

  • A. D. Kaczmarek-Penia•kova
  • L. Javorek
  • K. Orłowski

  - Annals of WULS, Forestry and Wood Technology - Year 2014

  In this paper results of the square MDF plate and circular saw blades examination with the use of the harmonic method to static identification of resonant frequencies and shapes of mode vibrations are presented. Obtained results reveled that for circular saws with large holes in a saw blade appeared two resonant frequencies for the same nodal number.

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• The reduction of vibrations in circular sawing machines

  Publication

  • K. Orłowski
  • P. Dudek

  - Annals of WULS, Forestry and Wood Technology - Year 2017

  The presented in this paper the main objectives of the research were to explore vibrations signals of the main spindle system, the machine tool body and a circular saw to extract informative features for assessment of the designs of the panel saw Fx3 and its follower Fx550.Even though the main spindle of the new table sliding saw Fx550 has its rotational speeds larger about 20% in comparison to the Fx3, peak values of the vibrational...

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• Luminescence of Ca(NbO3)2:Pr3+ at ambient and high hydrostatic pressure

  Publication

  • S. Mahlik
  • M. Grinberg
  • A. Kaminskii
  • M. Bettinelli
  • P. Boutinaud

  - Journal of Luminescence - Year 2009

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• Luminescence of CaWO4:Pr3+ and CaWO4:Tb3+ at ambient and high hydrostatic pressures

  Publication

  • S. Mahlik
  • E. Cavalli
  • M. Bettinelli
  • M. Grinberg

  - RADIATION MEASUREMENTS - Year 2013

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• Luminescence of Gd2(WO4)3:Ln3+at ambient and high hydrostatic pressure

  Publication

  • S. Mahlik
  • A. Lazarowska
  • B. Grobelna
  • M. Grinberg

  - JOURNAL OF PHYSICS-CONDENSED MATTER - Year 2012

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• Comparison of the measurement techniques employed for evaluation of ambient air odour quality

  Publication

  • W. Wojnowski
  • T. Majchrzak
  • J. Gębicki
  • T. Dymerski
  • J. Namieśnik

  - Year 2016

  The paper presents the results of investigation on ambient air odour quality in a vicinity of the industrial sewage treatment plant being a part of the crude oil processing plant. The investigation was performed during spring-winter season using a prototype of electronic nose and the Nasal Ranger field olfactometers. The prototype was equipped with a set of six semiconductor sensors by FIGARO Co. and one PID-type sensor. The field...

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• RESEARCH OF HYDRAULIC PISTON PUMPS’ START-UP IN LOW AMBIENT TEMPERATURES

  Publication

  • R. Jasiński

  - Year 2017

  Starting hydraulic pumps in low ambient temperatures may cause: decreased hydraulic-mechanical efficiency, larger vibration of hydraulic installation, faster wear and more frequent damage to the elements of pumps, change of material properties of elements, increase of pressure drop. As a result of increase of resistance of cold oil flow in the suction pipe, large underpressure may be experienced, causing incomplete filling of pump...

• Evaluation of the Commercial Electrochemical Gas Sensors for the Monitoring of CO in Ambient Air

  Publication

  • G. Jasiński
  • M. Dmitrzak
  • P. Jasiński

  - Year 2018

  Air pollution is a growing concern of civilized world, which has a significant impact on human health and the environment. Recent studies highlight that the exposure to polluted air can increase the incidence of diseases and deteriorate the quality of life. Hence, it is necessary to develop tools for real-time air quality monitoring. For air pollution monitoring a wide range of stationary gas and particulate analysers can be used....

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• Influence of the low ambient temperature on the start-up process of hydraulic pumps

  Publication

  • R. Jasiński

  - Year 2019

  Starting hydraulic pumps in low ambient temperatures may cause: decreased hydraulic-mechanical efficiency, larger vibration of hydraulic installation, faster wear and more frequent damage to the elements of pumps, change of material properties of elements, increase of pressure drop. As a result of pressure drop in the suction pipe, large underpressure may be experienced, causing incomplete filling of pump working chambers with...

• Electrical Propterties of Solution Mixtures for Bath Supervision in Ambient Assisted Living

  Publication

  • A. Bujnowski
  • K. Osiński
  • A. Poliński
  • T. Kocejko
  • J. Wtorek
  • A. Andrushevich

  - Year 2018

  Impedance properties of bath solution are compared. Any ingredient such as soap, shampoo or bathing salt changes bath-solution’s electrical properties eg. impedance. We have measured and analysed influence of typical bathing ingredients on electrical properties of the solution. We investigate impedance changes over frequency range from 100Hz tu 100kHz as it is most applicable for person detection. Electrical properties of bath...

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• Nickel-nanodiamond coatings electrodeposited from tartrate electrolyte at ambient temperature

  Publication

  • I. Makarova
  • I. Dobryden
  • D. Kharitonov
  • A. Kasach
  • J. Ryl
  • E. Repo
  • E. Vuorinen

  - SURFACE & COATINGS TECHNOLOGY - Year 2019

  In this study, nanocrystalline Ni and Ni-diamond coatings were obtained by electrodeposition from tartrate electrolyte at ambient temperature aiming at improving corrosion and wear properties of the material. The created surfaces were investigated with regard to microhardness, adhesion, wear- and corrosion-resistance. The various methods such as atomic force microscopy, scanning electron microscopy, electrochemical impedance spectroscopy...

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• Problems of the starting and operating of hydraulic components and systems in low ambient temperature. Part III.Methods of determining parameters for correct start-ups of hydraulic components and systems in low ambient temperatures

  Publication

  • R. Jasiński

  - Polish Maritime Research - Year 2009

  W artykule przedstawiono metody: eksperymentalną, analityczną i symulacji komputerowej określania zdatności oziębionych zespołów hydraulicznych do pracy w warunkach zasilania gorącym czynnikiem roboczym powodujących tzw. szok termiczny.

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• VIBRATIONAL SPECTROSCOPY

  Journals

  ISSN: 0924-2031 , eISSN: 1873-3697

• Raman scattering tensors for translational vibrations of ice

  Publication

  • L. Ziemczonek
  • M. Suffczynski

  - Il Nuovo Cimento D - Year 1991

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• Viscoplastic analysis of damped vibrations of circular plate

  Publication

  • A. Ambroziak

  - Year 2005

  Głównym celem artykułu jest przedstawienie procedury do nieliniowej statycznej i dynamicznej analizy MES z lepkoplastycznym prawem Bodnera-Partoma. Przedstawione są podstawowe równania modelu konstytutywnego wraz z koncepcją implementacji do komercyjnego programu MSC.Marc przy użyciu procedury UVSCPL. Przedstawiono przykład analizy numerycznej płyty kołowej, zweryfikowany eksperymentalnie. Dodatkowo przedstawiono koncepcje wyznaczania...

• Friction induced vibrations in sliding of monolithic alumina

  Publication

  • J. Łubiński
  • K. Druet

  - Year 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.

• Reduction of steel chimney vibrations with a pendlum damper.

  Publication

  • R. Jankowski
  • M. Kujawa
  • C. K. Szymczak

  - Year 2004

  Karman vortices observed around chimneys may induce dangerous structural vi-brations at certain wind velocities. The aim of this paper is to analyse theeffectiveness of pendulum damper in vibration reduction of a steel chimney. A two degree-of-freedom system is used to model the behaviour of the struc-ture equipped with a damper. The results of the study show that the use of pendulum with tuned frequency leads to significant...

• Chladni and circular saw disc vibrations visualisation

  Publication

  • L. Javorek
  • K. Orłowski

  - Year 2011

  In this paper are described some methods for saw disc vibration monitoring in march of time (chronology). Ernst Chaldni, the father of sound visualisation and his patternsis are mentioned. In the last partof article are introduced results received with authors measuring systems.

• Traffic-induced vibrations. The impact on buildings and people

  Publication

  • A. Jakubczyk-Gałczyńska
  • R. Jankowski

  - Year 2014

  Traffic-induced vibrations have recently been of major concern to engineers as one of the aspects of so called physical environmental pollution. The interest is related to the observations of serious negative effects of such kind of vibrations on buildings and their inhabitants. Traffic-induced vibrations may cause plaster cracks, structural damage and even failure and collapse of the structure. They may also be the reason of serious...

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• Application of Fast Cameras to String Vibrations Recording

  Publication

  • J. Kotus
  • P. Szczuko
  • M. Szczodrak
  • A. Czyżewski

  - Year 2015

  A hardware and software solution for guitar string vibration measurement by fast cameras is described. Orthogonal setup for 3D image acquisition is proposed capable to capture several thousand image frames per second. Dedicated image processing algorithm was developed and described in the paper, aimed at tracking the movement of some selected points along the string. Fast and accurate tracking results provided a detailed information...

• MACHINE VISION DETECTION OF THE CIRCULAR SAW VIBRATIONS

  Publication

  • J. Sandak
  • K. Orłowski

  - Journal of Machine Engineering - Year 2018

  Dynamical properties of rotating circular saw blades are crucial for both production quality and personnel safety. This paper presents a novel method for monitoring circular saw vibrations and deviations. A machine vision system uses a camera and a laser line projected on the saw’s surface to estimate vibration range. Changes of the dynamic behaviour of the saw were measured as a function of the rotational speed. The critical rotational...

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• Ambiente & Sociedade

  Journals

  ISSN: 1414-753X

• Effects of surface texturing and kind of lubricant on the coefficient of friction at ambient and elevated temperatures

  Publication

  • S. Wos
  • W. Koszela
  • P. Pawlus
  • J. Drabik
  • E. Rogos

  - Tribology International - Year 2018

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• Evaluation of Fire Hazard in Electrical Installations Due to Unfavorable Ambient Thermal Conditions

  Publication

  • S. Szultka
  • S. Czapp
  • A. Tomaszewski
  • H. Ullah

  - Fire - Year 2023

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• Comparison of the tests for equivalence of the measurement methods for measurement of PM10 dust in ambient air

  Publication

  • J. Gębicki
  • K. Szymańska

  - POLISH JOURNAL OF ENVIRONMENTAL STUDIES - Year 2011

  The paper presents the motives for conducting the equivalence tests and the reasons of discrepancies between the results of PM10 dust concentration obtained via the reference method and the methods based on 'on-site' measurement. The reference and non-reference methods of measurement of PM10 dust concentration in air have been discussed. Field tests for equivalence, following the Polish standard and the European Union (EU) guidelines,...

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• Evaluation of fire hazard in electrical installations due to unfavorable ambient thermal conditions

  Publication

  • S. Szultka
  • S. Czapp
  • A. Tomaszewski
  • H. Ullah

  - Fire - Year 2023

  Evaluation of fire hazard caused by electrical installations is a difficult and important topic, and it limits the possibility of loss of life or health of people, as well as the occurrence of significant property damage. In particular, this hazard was caused by power cables and especially photovoltaic (PV) installations. The authors proved that power cables directly exposed to strong solar radiation are likely to exceed maximum...

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• The influence of inflation pressure and ambient temperature on the value of the truck tires rolling resistance

  Publication

  • W. Owczarzak
  • S. Sommer

  - Autobusy. Technika, Eksploatacja, Systemy Transportowe - Year 2019

  The articlediscusses the effect of inflation pressure and the ambient temperature on the value of the rolling resistance of truck tires which directly translates into fuel consumption. For this purpose, a series of measurements was made at two ambient temperatures (at 25°C and -15°C), using different pumping pressures.

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• Volumetric and torque efficiency of pumps during start-up in low ambient temperatures

  Publication

  • R. Jasiński

  - Year 2021

  The volumetric, torque and total efficiency of hydraulic pumps change during start-up in low ambient temperatures, as well as in thermal shock conditions, un-til they reach the set conditions. The time to reach steady-state conditions de-pends on many parameters: ambient temperature, flow rate, fluid temperature, design of hydraulic units. The author carried out tests of hydraulic pumps in the Hydraulics Laboratory of the Faculty...

• Advances in Acoustics and Vibration

  Journals

  ISSN: 1687-6261 , eISSN: 1687-627X