Integrated analysis of strap mount for a circular mirror

摘要

In order to solve the nonlinear contact problem with the friction action in the mirror assembly, the modeling analysis is carried out by the MPC method of shell-to-solid coupling. Considering the friction factor existing in the contact region, the deformation and stress of the strap obviously changes from fixed region, transition region to contact region, which further produces a serious edge effect around the mirror and leads to the uneven stress distribution. The results show the maximal deformation of the assembly is 9.98 μm and the maximal stress is 10.5 MPa, which has much tolerance to the precision requirement of structure and the admissible stress of material; the influence of heat effect on the surface deformations of mirror is proved to be far greater than that of only gravity load. The advantages of the contact model built by the MPC method are more close to the actual working conditions and more accurate analysis results can be obtained.