The Design And Analysis Of Large Optical Vibration Isolation Platform

The optical platform is used for vibration isolation in many optical experiments and optical measurements.The technical specifications of the platform,such as the natural frequency,transmissibility and the frequency range for vibratin isolation,directly affects the accuracy of the experimental results.Therefore,the design method and vibration characteristic analysis of the platform is very important.To satisfy the request for vibration isolation of the optical platform,different platform structures and supporting schemes with airsprings have been discussed in the essay.The eassy determines the final scheme by comparing the supporting stiffness,static deformation and supportting stability.The key parameters to effect the isolation performance of the optical platform are volume of the air chamber,ralative damping coefficient,the volume ration between the main and the sub air chambers.The eassy choose the suitable parameters to ensure a low natural frequency and transmissibility.The eassy also design a new air spring structure which is based on the analysis of air spring vibration isolation systerm.This new air spring strucure can adjusting the natural frequency and transmissibility of the vibration isolation systerm.Among the different structure design schemes,topological optimization ia also be used to improve the stiffness of the final paltform stucture design scheme.The FEM software Hyperworks is used to analyze the modal and frequency response of the vibration isolation systerm.The smilulation results show the feasibility of the desigan scheme.The analysis of air spring vibration isolation systerm and structural design method based on topological optimization can improve the performance of the optical platform.It can provide some help for designing optical platform in the future.