vibration test Articles

  • MIRA utilise PULSE Sound Power Software for EU compliance

    MIRA is a leading automotive design, development and certification consultancy providing a wide range of European certification and homologation services for automotive and non-automotive customers, as well as conducting tests which are accepted for national approval in many countries worldwide. They provide Automotive Type Approval services for automotive legislation (“e” marking) and also ...

  • Dynamic Lateral Response of a Pile Group in Clay

    A series of lateral dynamic loading tests were conducted on a rigid concrete cap supported by nine 273-mm-diameter steel pipe piles in a square group. The piles were driven 13.7 m into a layered deposit of overconsolidated clay. A linear inertial mass vibrator applied horizontal constant-rate frequency sweep and steady state loadings from frequencies above the first mode resonance to frequencies ...


    By ASTM International

  • Beam model for tyre tread block dynamics

    The tyre provides the only connection between vehicle and road. Therefore, tyre performance is essential for the passengers' safety and comfort. Especially in winter the tyre can improve the vehicle handling and safety. For that reason, the winter tyre development gains more and more attention. Due to the special environmental demands for winter tyre tests the development process for winter tyres ...


    By Inderscience Publishers

  • A model and experimental investigation of belt noise in automotive accessory belt drive system

    This paper presents a model to characterise V-ribbed belt (Micro-VTM) noise in accessory belt drive system (ABDS), or front-end accessory drive (FEAD) of automotive engines. It has been known that radial friction-induced vibrations generate belt misalignment noise and tangential friction-induced vibrations relates to belt slip noise. In this study, these two kinds of vibrations are found ...


    By Inderscience Publishers

  • Predicting noise, vibration and harshness performance degradation through fatigue analysis

    Vehicle performance from a noise, vibration and harshness (NVH) perspective is typically evaluated at zero mileage. As the vehicle accumulates miles, systems that are considered as NVH sources and systems that are part of a noise and vibration path tend to see some degradation due to loosened joints, burnished gears, burnished bearings, etc. Up to date, efforts made to understand and predict NVH ...


    By Inderscience Publishers

  • 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 ...


    By Inderscience Publishers

  • 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 ...


    By ASTM International

  • Sensitivity analysis of simulation model on railway rolling noise prediction

    The railway rolling noise prediction software (RRNPS) is a simulation model for predicting the sound pressure levels during a train passage due to wheel/rail roughness, based on vibration dynamics, contact mechanics and sound radiation modules. Some field validation has been done under European and Australian conditions. Comparisons between simulations and measurements have shown that this ...


    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 ...


    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 ...


    By Inderscience Publishers

  • 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 ...


    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 ...


    By Inderscience Publishers

  • How to Install Stainless Sanitary Ball Valves

    Here are some steps for installing a stainless sanitary ball valve. Remove the protective cap on both sides of the flange first and clean it with the valve fully open. Before installation, it should carry out the whole machine ...


    By Adamant Valves

  • Automotive Diaphragm Riveting Assembly Machine

    The machine completes the automatic feeding, positioning and riveting of the automotive diaphragm, which is composed of pressure cylinder, a pressure device, 2 transport manipulator and unloading conveyor belt, etc. These components have a significant impact on the natural frequency, stress distribution and other indicators. The ...

  • Free-surface flow simulations for discharge-based operation of hydraulic structure gates

    We combine non-hydrostatic flow simulations of the free surface with a discharge model based on elementary gate flow equations for decision support in the operation of hydraulic structure gates. A water level-based gate control used in most of today's general practice does not take into account the fact that gate operation scenarios producing similar total discharged volumes and similar ...


    By IWA Publishing

  • 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 ...


    By HORIBA Europe GmbH

  • Optimisation of engine mounting systems using experimental FRF vehicle model

    Engine and body mount systems play a crucial role in vehicles' comfort. Engine mounts protect the engine from excessive movement and forces due to low frequency road and high frequency engine excitations. On the other hand, body mounts protect the cabin from vibration forces exerted by the body. Normally, a complete set of mounts is conceived at early stages of design, subsequently the set is ...


    By Inderscience Publishers

  • Investigation into noise problems in vehicle structure using vibro-acoustic approach

    The main focus of this paper is the study of the relationship between components of vibration and noise inside the passenger cabin of a production vehicle. The noise inside automobiles is largely composed of contributions from the engine, ground and wind. The engine and tyres successively transfer the vibration via the structural connections to the body panels, which then propagates through the ...


    By Inderscience Publishers

  • Performance of damage detection algorithms for health monitoring of joints in steel frame structures using vibration–based techniques

    Steel frame structures are widely used for industrial buildings, bridges, off–shore structures, etc., due to their high reliability and less construction time. In these types of structures, beams and columns are often connected by welding or fasteners forming rigid joints. In this study, viability of several damage detection algorithms for health monitoring of joints in planar frame structures ...


    By Inderscience Publishers

  • Assessment of room temperature influence on finger blood flow response induced by short-term grasping of vibrating handle

    Objective: To investigate the influence of room temperature on finger blood flow (FBF) change in healthy subjects exposed to short-term grasping of a vibrating handle under different room temperatures. Methods: FBF was measured using a blood flowmeter in six male subjects on the dorsum of the middle phalanx of third finger in both hands once at the end of every minute for an equal duration of 5 ...


    By Springer

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