Virtual Prototype Modeling And Design Of Vibration Table With High Thrust For Particle Impact Noise Detection System

As an indispensable basic component of electrical system,the reliability of sealed electrical components directly affects the reliability of electrical system,and the existence of redundancy is a common and fatal failure mechanism of sealed electrical components.In order to reduce the harm of redundancy to the reliability of electrical system,the sealing electrical components will be screened strictly before they are put into use.Particle Impact Noise Detection(PIND)test is a very effective and widely used method for detecting redundancy.The detection range and performance of PIND detection system are determined by its core component,electric shaking table.A PIND detection system needs to test relays with high quality,but the electric shaking table used in the system can not meet the requirements at present.It needs to be improved and designed,so it is necessary to study the modeling of the electric shaking table used in the system.Firstly,this paper establishes the corresponding numerical calculation models for the three core systems of the electro-magnetic mechanism system,reaction system and collision system of the electric vibration table.By establishing the existing numerical calculation models for each system of the small thrust electric vibration table,the feasibility and accuracy of the established numerical calculation model of the electric vibration table are verified.The numerical calculation model of each system is used to analyze each system of the electric vibration table,and the corresponding design scheme of the high thrust electric vibration table is obtained.After putting forward the design scheme of the large thrust electric vibration table,the corresponding virtual prototype model of the large thrust electric vibration table is established to solve the dynamic characteristics such as electromagnetic characteristics and motion characteristics of the large thrust electric vibration table.In order to solve the problem of non-linearity of reaction characteristics of large thrust electric vibration table,the mechanical-electrical-magnetic coupling model of large thrust electric vibration table is established by means of FLUXADAMS coupling calculation technology.In this coupling model,the following models are established: the non-linear finite element model of electromagnetic mechanism of high-thrust vibration table;the dynamic model of reaction system of high-thrust vibration table with flexible body;and the continuous impact force model of impact part of high-thrust vibration table.The virtual prototype model is used to verify the feasibility of the design scheme of the large thrust electric vibration table,and the actual prototype is made.The simulation results arecompared with the experimental results.It is found that the design scheme is in good agreement and achieves the expected effect,which proves the practicability of the method for the design of the large thrust electric vibration table.In order to solve the problem that the vibration noise will affect the test results of excess substance detection when the sinusoidal vibration test is carried out on a large thrust electric platform.In this paper,the acoustic model of high thrust electric vibration table is established,and the acoustic characteristics of high thrust electric vibration table are analyzed.The sound isolator is designed to eliminate the influence of noise generated by high thrust electric vibration table on the sound sensor in PIND detection system,and the sound isolation effect of the isolator is evaluated by the acoustic model of the isolator.Finally,it is verified by experiments that the high-thrust electric vibration table can complete the corresponding sinusoidal vibration test and impact test,and its vibration noise will not interfere with the sound signal of the detected surplus,and the high-thrust electric vibration table can be well used in the detection of the surplus in the PIND system.