vibration test Articles | Environmental XPRT

Ambient Vibration Testing of the Vasco da Gama Bridge, Portugal - Case Study

The results presented here were obtained by performing a re-analysis with ARTeMIS Modal Pro of the database created by Professors Alvaro Cunha and Elsa Caetano (Laboratory of Vibrations and Structural Monitoring of the Faculty of Engineering of the University of Porto, Portugal) during the dynamic tests performed on the Vasco da Gama Bridge at the commissioning stage, under contract with ...

Sep. 16, 2019

By Structural Vibration Solutions A/S

Vibration testing of a carbon composite fuselage

This paper describes the details of an experimental investigation focusing on the vibration characteristics of a composite fuselage structure of an ultralight unmanned aerial vehicle (UAV). The UAV has a total empty weight of 70.3 kg and 6.3 m in length. The fuselage structure consists of the fuselage body with an integrated vertical stabiliser. All structural components are fabricated from ...

Nov. 8, 2010

By Inderscience Publishers

Structural performance of prestressed façade limestone panels

Experimental studies on the behaviour and performance of prestressed natural stone hollow panels were performed using prestressing wires as internal tendons to apply a compression force to pre–assembled dimension stone slabs forming the panels. Six prototypes were subjected to three–point bending and vibration tests, and the effect of filling the panel void with polyurethane and of the ...

Sep. 23, 2013

By Inderscience Publishers

Training students on the TRIZ method using a patent database

The objective of this research is to develop a better method of teaching invention to young students with little engineering experience. The project used for this purpose was aimed at: 1) the creation of a new engine subsystem for better automobile fuel economy and 2) a feasibility study of a variable compression system. This project was conducted as an undergraduate thesis by three mechanical ...

Feb. 10, 2004

By Inderscience Publishers

Ambient Vibration Testing of a Dam, Canada - Case Study

The measurements and analysis presented here are performed by Professor Carlos Ventura, University of British Columbia, Vancouver, Canada. This case consider measurements conducted on a Canadian dam. The dam is 130 m long and 58 m high, and built in 1930. The measurements were conducted using an 8-channel measurement system. The sensors were Kinemetrics Episensor, forced balanced accelerometers. ...

Sep. 16, 2019

By Structural Vibration Solutions A/S

Ambient Vibration Testing of a Bell Tower, Switzerland - Case Study

The measurements and analysis presented here are performed by Dr. Reto Cantieni, RCI Dynamics, Switzerland. This case consider measurements conducted on the bell tower of the St. Peter & Paul church in Zürich, Switzerland. The measurements were conducted using a LMS Pimento data acquisition system. The sensors were PCB 93B31 accelerometers. The measurement campaign was divided into four ...

Sep. 17, 2019

By Structural Vibration Solutions A/S

Dynamic Behavior of the Bumpy Road Shaking Table System

Vibration tests were performed on the “bumpy road shaking table” system at the Cambridge University Geotechnical Centrifuge to investigate its dynamic behavior under operating conditions. In these tests, steel plates of known weights were fastened onto the base of the model container. The container was then subjected to “earthquake motions” simulated by the shaking table system and the ...

Jun. 1, 1989

By ASTM International

Modal Analysis of the Infante D. Henrique Bridge, Portugal - Case Study

Modal Analysis using SSI-UPC Merged Test Setups This case study presents an Operational Modal Analysis made using the SSI-UPC Merged Test Setups algorithm available in ARTeMIS Modal Pro. The results of an Ambient Vibration Test and Analysis of the Infante D. Henrique Bridge are presented below. The measurements have been made by Professors Alvaro Cunha and Filipe Magalhães, Faculdade de ...

Sep. 17, 2019

By Structural Vibration Solutions A/S

Sat-Com Communications Solutions - AGREE Chamber & Electrodynamic Shaker - Case Study

Namibia, Africa-based company Sat-Com Communications Solutions prides itself on being a 100% Namibian company. Founded in 1996, Sat-Com originally manufactured television and FM-radio transmitters and other broadcasting equipment. Now, Sat-Com focuses on manufacturing products for the military/defense sector, primarily man pack and base station Multiband-SDR-Radios. Sat-Com’s goal is to ...

Jan. 10, 2020

By Thermotron Industries

Changes in subjective ratings of impulsive steering wheel vibration due to changes in noise level: a cross-modal interaction

Cross-modal effects occur when subjective opinions of stimuli from one sense (e.g., tactile at steering wheel) are influenced by simultaneous stimuli in another sense (auditory). A steering wheel rig was used to provide specified vibration stimuli to participants' hands, and a recording of vehicle sound was played in accordance with the vibrations. Participants were subjected to test conditions ...

Aug. 17, 2007

By Inderscience Publishers

Vibration isolation for engine mount systems using an active hybrid robust controller

In this paper, a hybrid robust controller is proposed for reducing vibration on single input/single output (SISO) and multiple input/multiple output (MIMO) engine mount systems. The controller is designed to achieve robust stability and fast convergence by using a combination of the filtered-x least mean squares (FXLMS) and H∞ robust control methods. Plant response is identified by a ...

Aug. 3, 2005

By Inderscience Publishers

Investigations on damping characteristics of a honge oil-based magnetorheological fluid damper

Magnetorheological (MR) fluid damper is a kind of intelligent control device that can be used to reduce response of a vibrating member instantaneously with very few moving parts, which is essential in most of the mechanical systems, but challenging. In the present work, a prototype of smart damper using MR fluid (MR damper) is designed based on Bingham plastic model and fabricated to conduct ...

Oct. 20, 2011

By Inderscience Publishers

Application of Wire Rope Isolator for Vibration Damping in Vibration and Shock Isolation

With the deepening of isolation research and the development of isolation technology, nonlinear isolators suitable for various occasions have emerged. Laminated springs for the automotive industry are widely used in China. The principle is to use the dry friction between the steel plates to reduce the vibration and impact caused by the unevenness of the road. There are metal conical coil springs ...

Nov. 23, 2019

By Xi`an Hoan Microwave Co., Ltd.

Minor construction measures that influences vibration in concrete floors from foot steps and electric motors

Concrete floor constructions often suffer from high frequency vibrations. Humans aerobics workouts and various motors are sensitive to that kind of vibrations and it is of interest to find simple methods that reduce floor vibrations and thereby increase the comfort for habitants. Two steel framed concrete floors equipped with a vibration damping compound is used as a test object under laboratory ...

Jul. 23, 2013

By Inderscience Publishers

LEDFUL Advertising LED Display More Advantages and Features

LEDFUL is one of the most professional commercial led display manufacturers in China. LEDFUL advertising LED display providing solutions for commercial advertising, video billboard, shopping mall, cooperate, media, government, etc LEDFUL Energy Saving LED display by using high efficiency IC driver and improved PCB design and power conversion efficiency. Cylinder LED display, Curved LED display, ...

Sep. 13, 2019

By Shenzhe Ledful Electronics Co.,Ltd.

Experimental investigation of power-assisted steering pump noise for housing material change from cast iron to aluminium

Noise and vibration have an important influence on a customer's perception of vehicle quality. In this research, the major power-assisted steering pump noise propagation mechanism is determined. Noise and vibration comparison tests have been completed for subjectively good and bad cast-iron housed pumps, as well as for an aluminium housed pump. Decoupling tests for the steering rack disconnected ...

Sep. 21, 2007

By Inderscience Publishers

Application of Wire Rope Isolator for Vibration Damping in Vibration and Shock Isolation

With the deepening of isolation research and the development of isolation technology, nonlinear isolators suitable for various occasions have emerged. Laminated springs for the automotive industry are widely used in China. The principle is to use the dry friction between the steel plates to reduce the vibration and impact caused by the unevenness of the road. There are metal conical coil springs ...

Oct. 29, 2019

By Xi`an Hoan Microwave Co., Ltd.

Investigation on axial vibration of high-speed vehicle engine crankshaft based on Rayleigh differential method

A new mathematical model of axial vibration was constructed by simplifying the crankshaft to a continuous stepped shaft model and formulating kinetic formulae of shafts and masses. Applying a vector matrix, a single order or a whole system vibration can be analysed. Using a new testing device, vibrations at the free-end of the engine shaft were measured and compared with the calculation result. ...

Dec. 9, 2008

By Inderscience Publishers

OF Series

Outdoor Commercial Advertising LED Display OF4 | OF5 | OF6 | OF8 | OF10S | OF10D | OF16S Energy saving to save cost Front maintenance to save space Wifi, 4G, cloud, usb, remote control All weather resistant for stable operation High brightness provide perfect performance Parameter Value OF4 OF5 OF6 OF8 OF10S OF16S Pixel Pitch(mm) 4 5 6 8 10 16 Pixel Matrix Per Sq.m 62500 40000 27777 15625 10000 ...

Sep. 15, 2019

By Shenzhe Ledful Electronics Co.,Ltd.

Harmonic response analysis and research of bus body based on the modal shapes

The finite element model of the bus body is built in ANSYS software, and the finite element model was validated by stress tests. The mode shapes and the natural frequencies of the bus body determine its dynamic response properties, such as the transmission of vibration from the engine. The modal analysis is performed by using the ANSYS. Through the preliminary analysis of the modal shape and ...

Sep. 12, 2011

By Inderscience Publishers

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