Magnetorheological Elastomers Double Rotor Self Powered Damper Structure Design And Dynamic Analysis

As people’s living standards rise, cars have gradually entered into ordinary families and people also have more and more high requirement to the comfort of automobiles.Due to the rigidity and damping of the present shock absorber are fixed, the vibration reduction effect is not adjustable, thus affecting the riding comfort. New type shock absorber such as the magnetorheological damper, although its stiffness damping can be adjusted, sealing requirement is higher, so it can’t meet the demand of current vibration reduction. The traditional shock absorber vibration energy transformed into heat energy and finally passed into the air. If the vibration energy were recycled, energy consumption of the car will be reduced. This has become a problem to be solved, which cost the yoke of the external power and transform vibration energy into electrical energy storage for MR damper.This study aims to research a kind of the double rotor self-powered damper based on magnetorheological elastomer to solve the above problems, which vibration reduction and the power supply are integrated. In this paper, the concrete content of the structure design, theoretical analysis and simulation experiment research are as follows:1. The vibration module and self-supply module research status of the damper are comparatively analyzed both at home and abroad; The developing course of MRE is expounded and the several main movement transformation ways are studied.2. The production materials and processes of MRE are analyzed; Compare the advantages with its disadvantages of two work modes of magnetorheological elastomers,and extrusion model is selected. Model simulation of MRE is done, which found out the top 5 order natural frequency, and its features is analyzed; The MRE forced vibration damping system of single degree freedom quality- spring- model is set up.3. In view of the defect of the stiffness and damping adjusting of current shock absorber, a kind of double rotor self-powered damper which based on MRE is put forward; The system working principle of each module is explained, and important elements of the various modules are preferred respectively; The magnetic circuit ofvibration reduction module is theoretical analyzed and the structure is designed.4. Using Ansoft Maxwell platform, the damping module of the double rotor self-powered damper based on magnetorheological elastomer is finite element simulated,and the magnetic field distribution of each part of the structure is analyzed; The magnetic clouds of system are analyzed and magnetic concentration structures are optimized; The law of the core magnetic field concentration at different radius is studied and the magnetic induction intensity of MRE under different current and air gap is analyzed, providing a theoretical basis for the design of shock absorber and structure optimization of the control system.5. The response of human to vibration and the body sensitive area of various organs are studied, as well as the damping shock absorber performance is evaluated with the root mean square method; The input system, vibration system and output system are theoretical analyzed; The automobile vibration system is simplified and two degrees of freedom model is established.6. The B road random signal is set up in Matlab platform, as Adams simulation input; The dynamic simulation model is established using Adams platform under different current intensities, the change rule of the displacement and acceleration root-mean-square value are studied; The displacement and acceleration root-meansquare value change trends are further studied at various speeds and the optimal parameters of magnetorheological elastomer damper are obtained.