On The Simulative Study For The Structure Vibration Reduction Technology Of ANSYS

With the increasing development of the technology in modern national defense, it laid higher claim for precision navigation. The SINS(Strapdown Inertial Navigation System) was widely employed in the field of aviation, aerospace and military owing to its advantages of simple structure, light weight and precision-guided system etc. At the same time,since the movement of the SINS with the carrier in the air, the complicated environment, the navigation accuracy of the SINS was seriously interfered by ambient vibration. So it was quite necessary to control the vibration of the SINS.In this article, based on a large number of related literature at home and abroad, there are the simulative analysis studies in passive vibration isolation system, active vibration isolation system and hybrid vibration isolation system. And it compared and analyzed the simulation effect of vibration reduction of three kinds of vibration isolation system.The research issues are listed as following:1. this paper establishes the equivalent solid models in the light of SINS of the certain equipment. It obtains Vibration and the vibration characteristic of the SINS through using the finite element method by ANSYS software on the modal analysis and transient dynamic analysis.2. On the basis of the passive vibration isolation principle and the mathematical model of passive vibration isolation system of theoretical analysis and simplified, it has designed the SINS passive vibration isolation system, and theoretical and simulation analyzed of common model of vibration isolation. By ANSYS simulation on the damping of shock absorber is optimized configuration. Then the effect of vibration reduction of passive vibration isolation system is verified by making a modal analysis and transient dynamic analysis.3. On the basis of the passive vibration isolation principle and Hamilton principle it has designed the SINS active vibration isolation system based on the analysis of piezoelectric smart material, At the same time it has carried on the optimized allocation of piezoelectric actuator. The effect of vibration reduction of active vibration isolation system is verified by making a modal analysis and transient dynamic analysis.4. On the basis of the passive vibration isolation and the active vibration isolation, it has designed the SINS hybrid vibration isolation through joining the damping rubber mat and the piezoelectric pile in system. And a modal analysis and transient dynamic analysis is done on the SINS hybrid vibration isolation by ANSYS software. To comparing vibration reduction effect of the without damping system, the passive vibration isolation system, the active vibration isolation system and the hybrid vibration isolation system, it is verified the feasibility of the passive hybrid vibration isolation system.5. The system response time put forward higher requirements through analyzing and discussing the influence of time delay on the active vibration isolation.