光学载荷钢丝绳减震器的结构设计与分析

Structural Design and Analysis of Optical Load for Wire-Rope Shock Absorber

为了减小振动对大负载光学载荷在飞行过程中相机成像质量的影响,设计了一种新型向心结构的减震器。针对传统减振器的不足,提出了向心结构的设计方案,可以很好地将力进行解耦,通过在升降板上沿圆环均布的方式排列安装,有效避免了光学载荷内部发生碰撞。为了检验向心结构的减振效果,通过拉伸试验与有限元分析相结合的方式对光学载荷验证。结果表明,在120 kg负载下,整体结构最大变形为3 mm,最大应力为34.3 MPa,实际振型频率为9.81 Hz,均满足设计要求。

To reduce the effect of vibration on camera image quality during flight under heavy optical loads,a new type of centripetal shock absorber was designed.In view of the shortcomings of traditional shock absorbers,a design scheme for the centripetal structure is proposed that can effectively decouple the force.By uniformly distributing the force along the ring on the lifting plate,collisions within the optical load were effectively avoided.To test the vibration-damping effect of the centripetal structure,the optical load was verified using a combination of tensile tests and finite element analysis.The results showed that under a load of 120 kg,the maximum deformation of the entire structure was 3 mm,the maximum stress was 34.3 MPa,and the actual mode frequency was 9.81 Hz,which met the design requirements.