电视导引头光学整流罩的瞬态热应力耦合分析

Coupled Transient Thermal Stress Analysis of TV Seeker Optical Fairing

导弹在高马赫速度飞行时,电视导引头的光学整流罩的外表面温度会不断增加,随着温度的增加,导引头将发生热变形。导引头的变形最终导致成像质量下降。为解决上述问题,利用热应力耦合分析方法,将电视导引头的瞬态热度场与瞬态应力场的耦合过程进行了研究。采用APDL语言进行二次开发,完成了光学整流罩的瞬态温度场与瞬态应力场的耦合分析。结果表明,整流罩能满足实际工况需求。通过仿真,在提出电视导引头设计时需要考虑在第一材料段与第二材料段之间使用一些柔性连接,为类似的瞬态热应力耦合分析提供了借鉴。

When the missile flying at high speed, the outer surface temperature of TV seeker optical fairing will continue to increase. And then it will lead to the generation of thermal deformation, furthermore, it will affect image quality. In this paper, the thermal stress coupling analysis method was used to analyse the progress of transient ther- mal field and transient stress field coupling. What is more, APDL language was used for secondary development, and optical fairing transient thermal stress coupling engineering analysis was completed. The results show that the fairing can meet the needs of the actual working conditions, which provides a reference for similar transient thermal stress coupling analysis.