vibration severity Articles

  • Bearing fault severity estimation using time–based descriptors for rotating electric machines

    This paper evaluates the bearing fault severity in rotating electric machines based on the time–based descriptors derived from machine vibration signal. Time–based descriptors are independent of bearing dimensions and machine dynamics. To establish the relationship between the time–based descriptor and bearing fault severity, a wide range of defective bearings are examined on an experimental ...


    By Inderscience Publishers

  • 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

  • VSEP treats well and surface water to provide ultra clean drinking water

    New Logic Research manufactures a proprietary vibrating membrane filtration system that is uniquely suited for treatment of commercial and domestic drinking water. The use of a vibrating membrane mechanism to avoid membrane fouling is new and is just the kind of improvement needed to make the use of membrane filtration an effective and economical treatment solution for drinking water. New Logic ...


    By New Logic Research, Inc.

  • Minimum and Maximum Densities of Granular Materials

    Laboratory tests were conducted to determine minimum and maximum densities of arroyo sand, concrete sand, Ottawa sand, and glass beads. Minimum densities were determined by six different methods using two different molds. Maximum density tests were performed using an electromagnetic vibrator producing vertical simple harmonic motion. The vibration parameters investigated were frequency, ...


    By ASTM International

  • Numerical prediction of damping in structures with frictional joints

    In many vehicle and space structures, friction in bolted joints is the primary source of energy dissipation during vibrations. Several simplified finite element models have proven their capacity to describe the energy dissipation owing to micro-slip in joints. However, these simplified models require extensive physical testing in order to extract model parameters. This paper proposes a ...


    By Inderscience Publishers

  • Dynamic characterisation of elastomeric engine mounts of different geometry used in automotive industry: simulation approach

    Generally, the vehicle engine mounting system consists of an engine as the vibration source and several mounts connected to the vehicle structure. The modern engine mounting systems have been successfully used to isolate the driver and passenger from both noise and vibration generated by the engine. However, there is still a need to improve the performance of engine mounting systems because of ...


    By Inderscience Publishers

  • Concrete Construction Health Effects

    It’s no secret that working in Concrete Construction is dangerous. The immediate safety hazards are well known. Getting speared or cut on rebar, sore from the hard physical labor; cuts or punctures from nails; and struck by tools, materials or equipment can all cause injuries. Add to that possible falls especially at the leading edge; cuts or shock from powered equipment; burns or explosion ...


    By SafetySmart

  • Evaluation of various theories of the thickness and curvature approximations for free vibrational analysis of cylindrical and spherical shells

    Cylindrical and spherical shells are largely used in several engineering fields, especially in aerospace vehicles as structural elements and in automotive vehicles as shafts or exhaust and induction systems. Due to their particular relations with vibrations of automotive structures, this work compares various significant shell theories to evaluate the free vibration response. Thin shell theories ...


    By Inderscience Publishers

  • Vibro-acoustic analysis of functionally graded circular discs under thermal environment

    A circular disc made up of Functionally Graded Material (FGM) with several cases of FGM index are modelled and their vibration response to a harmonic point load in a thermal environment with temperature dependant material properties was computed by using the Finite Element Method (FEM). A macro was developed by the corresponding author in ANSYS Parametric Design Language for modelling FGM using ...


    By Inderscience Publishers

  • Operational transfer path measurements and analysis - Case Study

    As a developer of in-wheel powertrain, Elaphe Propulsion Technologies Ltd. has to make sure that it’s powertrain does not emit excessive vibrations, that will result in structure-borne noise. Since vehicle suspension is typically not considered to also perform as a motor insulation system, there is a lack of knowledge on specific vibration insulation properties, especially in higher ...


    By DEWESoft

  • Marine Monitoring to Maximise the Performance of Marine Machinery

    Considering the cost of putting to sea, it is well worth investing in vibration monitoring equipment that can help engineers to protect and maximise the performance of marine machinery. Here, we discuss the challenges facing engineers and offers advice on how to successfully install and use vibration sensing equipment on marine vessels. As machinery has become more complex and mankind has ...


    By Hansford Sensors

  • Element Inspection Criteria for Couplings

    Baldor-Dodge Raptor’s easy to assemble, patent-pending split rubber element significantly decreases total cost of ownership and extends driven equipment life. Designed for drop-in interchangeability, the Raptor offers easy installation and reduced maintenance in an innovative design. When it is time to inspect or maintenance the coupling, it is important to know what to look for so elements ...


    By Modern Pumping Today

  • Food industry: Monitoring a fan imbalance - Case Study

    Equipment, Context: The Plant is located in Northern Europe, producing amino acids amongst other products. The site is operating 24/7 all year long. The fan (impeller) is supplying drying process with hot air. Fan is unique and doesn’t receive a deep prediction system or strategy. Fan bearing housing is equipped with a vibration ...


    By Wi-Care

  • Vibration reduction in water pump motor with magnetically boosted Tuned Mass Damper - Case Study

    Problem description: A 75kW water pump motor experiences excessive vibration levels (up to 11mm/s RMS) due to the presence of a structural resonance in the mechanical supporting structure (see below). The frequency of this structural resonance lays in the operating range of the variable speed motor, leading to a significant vibrations amplification. The vibration measurements have been ...


    By Micromega Dynamics SA

  • Algae control in drinking water treatment - case study

    For the Ministry of Agriculture in Cyprus, LG Sound b.v installed 33 LG Sonic, ultrasonic devices in the Limassol water treatment plant, to prevent bad odour and taste to the water caused by geosmins in the water. The earthy taste problem persisted during summer of 2010 and various physical, chemical and biological tests were done in order to check the process efficiency, which showed problems ...


    By LG Sonic

  • 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

  • Vibration – What is It? How does it Affect My Operation? What can I Do About It?

    ABSTRACTThis paper describes how pump vibration can create problems in conveyance systems. Potential sources of vibration are reviewed as well as factors that affect pump vibration. Examples are presented that demonstrate pump vibration problems: (1) when a wet well level was lowered to obtain system storage capacity, (2) in a new installation, and (3) when one pump in an installation functioned ...

  • Analysis of semi-active suspension systems for four-axles off-road vehicle using half model

    Handling and ride quality are affected by many factors, including high-frequency vibrations, body booming, body roll and pitch motion, vertical motion by the suspension system and frequency vibration transmitted from the road input excitations. This article focuses on the most significant vibration source that affects handling and ride quality, which is the suspension system. Passive suspension ...


    By Inderscience Publishers

  • 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 ...


    By Inderscience Publishers

  • 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

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