CAJ | 학술논문

大口径大温差环境下的长条形反射镜沿用传统支撑方案难以满足高结构刚度和高热稳定性,而由于其结构的不对称性,一些广泛用于圆形主反射镜中的支撑方式又难以展开,针对该问题本文提出了一种球铰 bipod 热稳定结构有效提高了反射镜在自重和热载荷作用下的面形精度.文中对该结构的模态进行了理论分析并得出了解析解,对支撑结构的优化布置以提高组件的刚度起到有效的预测与指导作用.通过结构参数与支撑结构布置的优化,很好的满足了该长条形反射镜组件的高刚度、高热稳定性要求.
대구경대온차배경하적장조형반사경연용전통지탱방안난이만족고결구강도화고열은정성,이유우기결구적불대칭성,일사엄범용우원형주반사경중적지탱방식우난이전개,침대해문제본문제출료일충구교 bipod 열은정결구유효제고료반사경재자중화열재하작용하적면형정도.문중대해결구적모태진행료이론분석병득출료해석해,대지탱결구적우화포치이제고조건적강도기도유효적예측여지도작용.통과결구삼수여지탱결구포치적우화,흔호적만족료해장조형반사경조건적고강도、고열은정성요구.
According to the fact that it is difficult to satisfy the requirement of high structure stiffness and thermal stability with traditional support methods for large aperture rectangular reflector under self-gravity and large temperature changes, a spherical hinge support structure is introduced to effectively improve the surface accuracy of large aperture rectangular reflector under self-gravity and thermal load. Theoretical model analysis was conducted and analytic solutions were derived which could be useful to guide the optimization design of the support structure and predict the stiffness at the design phase. Finite Element Analysis is conducted for the spherical hinge bipod support of a 540×437 reflector. The result indicates that this kind of support structure can effectively improve the assembles’ thermal stability and stiffness and well satisfy the requirement.