Magnetorheological Hydraulic Suspension Dynamic Simulation Analysis And Structural Optimization

Car as one of the means of transport that are essential to people’s lives, its comfortand safety performance is required higher and higher, minimize vehicle vibration,reducing vehicle noise is an important way to improve vehicle comfort performance.The engine internal incentives and the external incentives brought about by unevenpavement cause vehicle vibration, therefore designing the vibration isolation devices,which effectively isolate the internal incentives to transfer to the frame and the externalincentives transfer to the engine, is the focus of this study.In this thesis, a comprehensive analysis of the basis of the course of development ofthe engine mount at home and abroad, the status quo, the types and the advantages anddisadvantages, combining some of the advantages of the other suspensions, andapplication of MRF material as a suspension medium, designing magnetorheologicalhydraulic suspension structure, in order to improve the performance ofmagnetorheological hydraulic suspension, This paper focuses on magnetorheologicalhydraulic suspension magnetic circuit design, parameters affect suspension dynamicperformance, magnetorheological hydraulic suspension structure optimization and so on,through experiment to verify the results of the study. The main contents are as follows:①Magnetorheological hydraulic suspension internal magnetic circuit design, which considers the direction of action of the magnetic field, magnetorheological fluid,the core material select, the inertia track design, the number of turns of the coil andother factors. application of magnetic field analysis software analyze the four differentsuspension of internal structure of the magnetic field, ensure magnetic field lines toreasonably distribute of inertia channel large enough magnetic induction program, themagnetorheological fluid flow through the inertia track MR effect into full play, therebyimproving the overall performance of the suspension, magnetorheological hydraulicsuspension structure designing, material selection and structural parameters optimizedto provide a reference.②By adjusting the cross-sectional area of the inertia track and inertia channellength and rubber main spring stiffness and rubber main spring equivalent to the area ofthe piston and flexibility of the upper fluid chamber volume, anslyzing of the fiveparameters impact the magnetorheological hydraulic suspension of dynamic stiffnessand hysteresis angle. For the design of the inertia track structure parameters, rubber main spring material selection, structural dimensions designed to provide theoreticalguidance.③Magnetorheological hydraulic suspension modal analysis，get suspended sixnatural frequencies and natural formation, analyze the suspension deformation trend, themagnitude of deformation. In order to the suspension achieve the desired effect ofvibration isolation, you can adjust the structure of the magnetorheological hydraulicsuspension, materials and mounting, adjust the suspension of the natural frequency, asfar as possible away from the suspension natural frequency of the excitation frequency.Modal analysis of magnetorheological hydraulic suspension structure design andoptimization, material selection, mounting provide theoretical reference.④In practical work, the main rubber spring part is prone to fatigue wear.Analyzing the main rubber spring fatigue, getting rubber main spring areas of stressconcentration and the safety factor. In the process of optimizing the structuralparameters of the main rubber spring, fatigue analysis provides a theoretical basis toextend rubber main spring life and improve the rubber main spring tear resistance,abrasion resistance, impact resistance, flex resistance, at the same time to improve theoverall magnetorheological hydraulic suspension comprehensive the performance has avery important significance.⑤By MTS assay platform of different inertial channel cross-sectional area,different inertial channel length, different rubber main spring stiffness, different rubbermain spring equivalent piston area magnetorheological hydraulic suspension test samplefor testing, get parameters and in the coil is energized1.5A current conditionsmagnetorheological hydraulic suspension performance, analyze magnetorheologicalhydraulic suspension of dynamic stiffness curves and hysteresis angle curve than thedynamic stiffness curve and hysteresis angle of ordinary hydraulic suspension in therange from0to50Hz frequency, a significantly improved effect, therebymagnetorheological hydraulic suspension performance than ordinary hydraulicsuspension performance has been significantly improved.