shaft vibration Articles

  • Experimental investigation of active vibration control for gear set shaft

    In this study, three different active vibration control (AVC) algorithms are implemented and compared in the experimental investigation of gear set shaft vibration control. Apart from feedforward and feedback control system, a hybrid controller is proposed, which is a combination of the adaptive control with filtered-x least mean squares (FXLMS) algorithm and feedback structure with robust ...


    By Inderscience Publishers

  • Transverse vibration of multi-segment shaft system joined with multiple hinges

    A driveshaft with discontinuities (i.e., joints) is a major component in various industries including marine and automotive ones. The segments of a multi-piece driveshaft in automotive applications are joined using constant velocity or universal joints or a combination of both. The design of the driveshaft of an automotive system is primarily driven by its natural frequency. This paper presents ...


    By Inderscience Publishers

  • Opening the envelope on bearing vibration

    A sophisticated signal processing technique can help to pinpoint bearing failure at an early stage. Chris Hansford, Managing Director at Hansford Sensors, explains. Experienced operators can often tell if a machine is not working properly, on the basis that is does not ‘sound right’. The same principle can be applied – using modern electronics – to identify the exact cause ...


    By Hansford Sensors

  • Analytical and experimental study on bending vibration of internal combustion engines shafting system based on wave equations

    This paper proposes a new analytical approach to study the bending vibration of N step shafting system. Changes of the shaft step properties under rotary condition are governed by two–dimensional wave equations. The source of the bending vibration is first analysed. Then strain and stress equations of the spinning shaft are established. After Hamilton principle is applied, a two–dimensional wave ...


    By Inderscience Publishers

  • Vibrating feeders for stockpiling and reclaim

    The expanding applications of vibratory feeders for controlling the flow of bulk materials, and their adaptation for processing requirements, have developed considerable interest in stockpiling and reclaim systems. The general design of these units consists of a material transporting trough, or platform, driven by a vibratory force system. The flexibility and variety of designs is limited only by ...


    By General Kinematics

  • A rigorous beam model for static and vibration analysis of generally laminated composite thick beams and shafts

    A first order shear deformation model for static and vibration analysis of composite thick beams and shafts is proposed and verified. The model is based on an earlier one proven to be accurate only for cross–ply laminates. The proposed model uses equivalent stiffness parameters that enable it to be accurate for every laminate. A three dimensional (3D) finite element model (FEM) is used to verify ...


    By Inderscience Publishers

  • Case study: STM vibrating screens

    Challenge Customer wanted to replace an existing vibrating screen due to frequent mechanical failure issues. Existing screen technology utilized the traditional brute force drive with large shafts, bearings, and motors. In the application, brute force screen technology typically had a useable life of around 1 year before mechanical failure occurred. The new screen needed to fit into the ...


    By General Kinematics

  • Monitoring vibrations, mechanical seals, and bearings for safety and performance

    With more than 70 years of experience in plastics processing, Switzerland-based Quadrant Group is a leading expert in a wide range of polymer materials and technologies for polymer conversion. In order to maintain a high level of quality in the production process, Quadrant's heat-transfer pumps must work safely and reliably. These pumps are commonly subjected to high loads. At the same time, ...


    By ALLWEILER GmbH

  • Vibrating Screen Separators: Maintenance and Downtime Issues

    A vibrating screen separator is a big investment for any operation and an important part of your overall process. A good screening machine will be able to reliably meet your production goals while keeping your overhead costs to a minimum. The potential for maintenance and downtime are important considerations to factor into a new ...


    By VibraScreener Inc.

  • 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 ...

  • Optimisation of frequencies of a two-span shaft system joined with a hinge

    A driveshaft with discontinuities (i.e. joints) is a major component in various industries. A multi-piece driveshaft in automotive applications is joined using constant velocity or universal joints or a combination of both. This article presents an exact solution for the vibration of a two-piece driveshaft with an intermediate single joint. The joint is modelled as a frictionless internal hinge. ...


    By Inderscience Publishers

  • Fatigue initiated overload failure of a 4130 alloy steel pump shaft

    This paper describes the failure investigation of a vertically mounted tank cleaning pump system from an off–shore oil platform. The incident involved the catastrophic failure of an intermediate shaft, connecting pump shaft and surrounding components. Corrosion to the shaft ball bearings on the pump shaft generated excessive vibrations which transferred via a universal joint to the connecting ...


    By Inderscience Publishers

  • Modal parameters of a flexible disk–flexible shaft system from simulated data

    A global multiple–input multiple–output modal parameter scheme is employed with the frequency response function (FRF) matrix, to accurately estimate modal parameters of the closely coupled modes of a flexible disk–flexible shaft system from simulated data. The Lagrangian approach is combined with the assumed mode method to derive the governing equations of motion, where the uncoupled disk and ...


    By Inderscience Publishers

  • Modal parameters of a flexible disk-flexible shaft system from simulated data

    A global multiple-input multiple-output modal parameter scheme is employed with the frequency response function (FRF) matrix, to accurately estimate modal parameters of the closely coupled modes of a flexible disk-flexible shaft system from simulated data. The Lagrangian approach is combined with the assumed mode method to derive the governing equations of motion, where the uncoupled disk and ...


    By Inderscience Publishers

  • Industrial Noise and Vibration: High-speed balancing - Case Study

    Dynamic balancing of rotating elements is an important aspect of the manufacture and the repair of any turbomachinery. A rotating element that is out of balance can cause major operational difficulties, which may prevent the timely start-up of a facility. Furthermore, the unbalanced element can cause internal damage that will rob a machine of its design efficiency, reduce machine reliability, and ...


    By Sulzer

  • 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. ...


    By Inderscience Publishers

  • Effect of servomotor control parameters on the dynamic behaviour of a coupled elastic shaft-elastic beam system

    In this study, a servomotor-driven coupled elastic shaft-elastic beam system is analysed. This mechanism has considerable applications in the industry and can be present in vehicles. Equations of motion are derived with respect to the generalised coordinates of the elastic shaft, elastic beam and the servomotor rotation. Frequency equations and mode shapes for the elastic beam and elastic shaft ...


    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 ...

  • 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

  • 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

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