The Mechanical Structure Of The Multi-degree-of-freedom Electro-hydraulic Vibrating Table And The Design Of The Hydraulic Control Part

The vibration of electromechanical products can not be ignored and it's very important to carry out the vibration test.However,it's not feasible to do it in real environment because of expensive price.The shaking table test is a reliable way of simulating vibration environment?checking equipment reliability and dynamic strain.The paper is about how to use modern design method to design and study multi-degree of freedom electro-hydraulic shaking table used for simulating special vehicle vibration.Firstly,the overall scheme is determined according to the specific requirements,the main shape dimensions and the connecting device structure of the shaking table have also been finished.Based on this model,the dynamic simulation is carried out in five kinds of operating conditions and the largest driving force of the vertical and horizontal hydraulic cylinders.is found Tilting 15° and 4° are the most important two operating conditions because of more stress.Then,checking the rigidity&strength of the hydraulic cylinders and connecting devices with considering bolt pretension by using finite element method.According to the result,the parts designed are properly optimized.At last,based on module designed thought,the hydraulic system diagram,which includes the key dynamic system circuit,horizontal vibration system circuit and vertical vibration system circuit,is designed.Modular hydraulic manifold blocks of electro-hydraulic shaking table are designed,A rational layout for pump stations is carried out,too.The paper starts from the requirement,The dynamics performance and hydraulic system of the shaking table is studied based on the dynamic theory and finite element theory.This design has great significance for the quality and improvement of shaking table test device.