According to the basic principle of the shearer’s travelling mechanism to build the virtual prototype based on UG and ADAMS, and then carry out kinematics simulation of this virtual prototype .The error of angular velocity of every level transmission between virtual prototype and theoretic values . The results can be taken as the guideline for future structural design and dynamic simulation analysis.

Acording to the fact that the finite element model of electromagnetic vibration shaker for virtual experiment is not accurate enough to complete accurately spacecraft test, made a correlation analysis of the finite element output frequency response function and the measured frequency response function by their correlation coefficients. Analyzed the sensitivity of the materials for FRF and screened the parameters to update, made the correlation coefficient error of electromagnetic vibration shaker finite element model frequency response function and the measured as the optimization objective, the optimization and modification of shaker finite element model parameters were completed by iteration method. The frequency response function of the modified finite element model approximately agreed with the experimental frequency response function. It met the virtual experiments of electromagnetic vibration shaker.

A belt conveyor is a kind of major equipment to carry loose materiel and is widely used in industries such as mine port, metallurgy, etc. for its numerous advantages. But Because of the influence of belt itself and outside factor, the accident that the belt is cut off often appears, which make a grate threat for safe production. Gives detail introduction to several types of broken belt protectors used in home, analyzes its working principle and advantages and disadvantages, provide certain reference for the user choice.

with the development of finite element technology, finite element model is becoming to the main analysis tool. However, because some theoretic assumptions, unsuitable constraint and uncertain material property are applied, the simulation result of finite element model isn’t different from the testing data. In order to improve the design quality and safety of spacecraft, this paper deduced the formula of spacecraft finite element updating, developed the spacecraft finite element model updating system, the software mainly of five parts: the frequency response function calculation, the loading inverse solution, the finite element model updating, the data display, virtual experimentation. Software can complete exciting force inverse, parameter sensitivity analysis, parameters screening and finite element model updating. The calculation result of updated finite element model is in accordance with testing curve shape on the main vibration direction, first-order frequency error is ±5%, response error is ±10%. Software meet the need of finite element model updating, it provide a software base for spacecraft design.