基于拓扑优化技术的光电平台弹性轴优化设计

竖直方位弹性轴系是机载光电平台关键部件以及主要承受载荷的部件,由于其负载重大,所以竖直弹性轴的强度、刚度与基频频率将直接影响光电平台的跟踪精度与稳定性。本文采用拓扑优化技术结合挠性设计思想对弹性轴进行结构优化设计,合理布置加强筋位置,弹性轴质量减轻38.5%,壁厚减小40%,基频数值提高19.7%,且在高温载荷下由于温度应力引起最大变形量减小23%,在不影响机械性能以及热性能的前提下优化结构,减轻了重量。

Topology Optimization Design for Elastic Shafting of Optoelectronic Platform

The vertical azimuth shafting is the key component and the main bearing component of airborne optoelectron-ic platform, because of its heavy load and large inertia moment, its strength, stiffness and fundamental frequency will directly affect the tracking accuracy and tracking stability. The topology optimization combining with flexibility design thought is adopted in this paper to exercise optimal design on elastic shafting, the stiffeners are distributed rationally, the quality of elastic shafting reduces by 38.5% and its wall thickness reduces by 40% but the value of fundamental fre-quency increases by 19.7% and the deformation caused by temperature stress under high-thermal load reduces by 23%, the weight decreases and the mechanical structure is optimized without influencing mechanical properties or thermal property.