vibration test Articles | Environmental XPRT

Vibration testing of fuel probes

Aerial Refuelling The American Bell-Boeing V-22 Osprey is a multimission, military, tilt rotor aircraft with both a vertical and short takeoff and landing capability. It combines the functionality of a conventional helicopter with the high-speed cruise performance of a long-range turboprop aircraft. But even though it is long-range, some missions require in-flight refuelling. The V-22 Osprey can ...

Jun. 14, 2010

By Brüel & Kjær Sound & Vibration Measurement 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. 7, 2010

By Inderscience Publishers

Ensuring satellite reliability with vibration testing

They offer space test and ground-based facilities where they design and build instruments, and analyse and process data. They also operate ground-station facilities, and lead conceptual studies for future missions. Working with space and ground-based groups around the world, they are now the largest space science department in Europe, and have been involved in over 150 missions in recent years, ...

Apr. 30, 2013

By Brüel & Kjær Sound & Vibration Measurement A/S

Smartphone app improves vibration testing setup at Faurecia

Setting up for modal analysis is time consuming and can be a painstaking task. But with the Transducer Smart Setup app, automotive seating manufacturer, Faurecia, could drastically reduce the setup time and risk of human errors. Modal testing is necessary and the challenges are abundant. Setup errors and human input errors are not difficult to introduce and can make an already ...

Jun. 26, 2017

By Brüel & Kjær Sound & Vibration Measurement A/S

Vibration monitoring and analysis in aircraft engine test cells

Snecma, part of the SAFRAN group, is dedicated to the production of engines for both air and space. Working alone or in partnership, Snecma designs, develops and produces engines for civil and military aircraft, launch vehicles and satellites. The company is organised in three divisions: Commercial Engines – Snecma and GE Transportation team up to produce the bestselling family of CFM56 ...

Aug. 31, 2006

By Brüel & Kjær Sound & Vibration Measurement A/S

Chevy volt uses LDS vibration test system for electric vehicle battery durability tests

General Motors General Motors, one of the world’s largest automakers, traces its roots back to 1908. With its global headquarters in Detroit, GM employs 204,000 people in every major region of the world and does business in some 140 countries. GM and its strategic partners produce cars and trucks in 34 countries, and sell and service these vehicles through the following brands ...

Dec. 8, 2010

By Brüel & Kjær Sound & Vibration Measurement A/S

Reduction of roof rack noise and vibration

The noise and vibration design of automotive add-on component roof rack was investigated. Different modification options were evaluated which include mounting location alteration, mounting damping change and material revision. Results from experimental modal analysis and sound pressure spectrum measurement in a wind tunnel indicate the direction of design modification for reduction of the roof ...

Nov. 7, 2010

By Inderscience Publishers

TRaC UK – LDS V984 vibration testing of fuel probes for the V22 Osprey

The Partnership Founded in 1934 as Flight Refuelling Limited (FRL), Cobham plc is a British manufacturing company based in Wimborne Minster, Dorset, England. It is organised into four core technology divisions – Mission Systems, Defence Systems, Avionics and Surveillance, and Aviation Services. The Cobham Mission Systems Division claims to be the world market leader for air-to-air ...

Dec. 8, 2010

By Brüel & Kjær Sound & Vibration Measurement A/S

Engine Testing

Engine testing involves measurement of rotating speed and torque of the engine by applying load controlled by a dynamometer connected to its output shaft. HORIBA has developed various types of dynamometer for the purpose of engine testing. They are mainly classified into two types; one is absorbing only dynamometer such as hydraulic dynamometers and eddy-current dynamometers, the other is ...

Feb. 7, 2010

By HORIBA Europe GmbH

Chevy volt battery durability testing

Accelerated Lifetime Tests Hybrid power technology development is ramping up globally in today’s ultra competitive automotive industry – and these technologies of the future demand vibration test solutions that can efficiently perform accelerated lifetime tests even on large and fully operational assemblies. General Motors’ 3000 sq.m battery test ...

Aug. 2, 2010

By Brüel & Kjær Sound & Vibration Measurement A/S

Inalfa - production testing of sunroof systems

Production Testing of Sunroof Systems Sound and vibration are growing in importance as critical factors in product quality. Therefore, manufacturers are required to perform noise and/or vibration quality testing prior to shipping a product. The proper implementation of such a test is a significant challenge – one that can offer a very large return on investment. To address this ...

Dec. 9, 2010

By Brüel & Kjær Sound & Vibration Measurement A/S

Brake Test Systems

For quality assurance and technical refinement of brakes, which are of course highly important for vehicle safety, the brake R&D engineering community makes extensive use of a variety of dedicated brake test systems. For example, a friction tester can evaluate wear-behaviour and friction coefficient of materials and is utilized for managing the production quality of such materials. An inertia ...

Feb. 7, 2010

By HORIBA Europe GmbH

A Device for the Measurement of Sub-Surface Ground Vibrations

A reliable measurement of free-field stress waves from transient loading has several important applications, for example, in the design of effective wave barriers to protect sensitive equipment and in the design of underground protective structures against explosive loading, to name a few. The characteristics of a stress wave are highly dependent on the energy source and the soil medium through ...

Aug. 31, 1996

By ASTM International

Asset Management Condition Assessment for Stockton: To Test or Not To Test

ABSTRACTTo help ensure assets are maintained to high standards, a 20-year service contact between the City of Stockton and OMI/Thames Water required a condition assessment of all managed assets. Due to the size and complexity of the system, it was not possible to test all assets as part of the condition assessment. A methodology was developed to prioritize assets to be subjected to further ...

Oct. 21, 2006

By Water Environment Federation (WEF)

Application of particle damping for vibration attenuation in brake drum

The mechanism of noise of brake is very complex. A particle damper can be introduced without changing the shape of the structure and the addition of mass, and it may be applied in extreme temperature environments where most conventional dampers would fail. However, previous particle damper designs have been based on trial-and-error experimentation. In this paper, the feasibility of an application ...

Jun. 7, 2011

By Inderscience Publishers

Wind tunnel testing

With all the time and care we put into their existence, each of our products quickly becomes our “baby.” It’s hard to abuse something so near and dear, but for product designers like me, this type of testing is necessary. We did a couple of rounds of wind tunnel testing on a WSD-1 (the Dyacon wind sensor) using an ELD wind tunnel with an 18″ square ...

Jan. 9, 2014

By Dyacon, Inc.

Resonant Column Testing of Frozen Ottawa Sand

The unique properties of frozen soils have posed special problems for engineers seeking to install stable structures in cold climates. Foundations, pipelines, and other structures subjected to high-frequency low-amplitude vibrations present special problems to the designer even when construction occurs in nonfrozen ground. When these dynamically loaded structures must be founded in frozen soil, ...

Aug. 31, 1987

By ASTM International

MIRA Ltd., EU noise directive testing

The Company Vehicle engineering specialist, MIRA, is a leading design, development and certification consultancy delivering engineering solutions from individual tests to turnkey vehicle design programmes. MIRA’s customers include vehicle manufacturers and equipment suppliers across the automotive, defence, aerospace and rail sectors. Around 400 dedicated employees, ...

Dec. 9, 2010

By Brüel & Kjær Sound & Vibration Measurement A/S

Vibration-based approach to lifetime prediction of electric motors for reuse

This paper is concerned with lifetime prediction of components in washing machines. Vibration signals were measured on electric motors during an accelerated lifetime test ranging from 26.7 to 38.5 simulated years. Loose bearings have initiated air-gap eccentricity and rotor-to-stator rubbing, which resulted in a motor breakdown. Significant frequency bands were identified using a spectral ...

Feb. 15, 2010

By Inderscience Publishers

Evaluation and reduction of steering column vibration of a rear wheel drive sedan

Vehicle noise, Vibration and Harshness (NVH) has become a key enabler for successful distinction between competitive vehicles because consumers have come to judge vehicle quality by NVH levels. One of many critical areas of NVH is the amount of vibration felt in the steering wheel as the customer drives the vehicle. This paper presents the evaluation of steering column vibration for a rear-wheel ...

May 10, 2004

By Inderscience Publishers

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