Structure Analysis and Design of Lightweight Optical Bench

摘要

Aiming at the structure design of lightweight and highly rigid optical bench, based on finite element method and complex mode theory, a compared analysis is made of the inherent frequencies and modal damping ratios of the honeycomb sandwich structure with trussed core design and the stiffened plate structure for the same weight. The structure parameters of the honeycomb sandwich structure are designed, such as the size of the honeycomb cell, core thickness and bench height, and the influences of these parameters on the inherent frequencies of the structure are explored. The results show that the honeycomb sandwich structure possesses higher rigidity weight ratio and superior dynamic characteristics than the stiffened plate structure for the same weight. Honeycomb sandwich structure with proper design can meet the requirements of lightweight optical bench design.