上海航天（中英文）2025，Vol.42Issue(z1)：219-226,8.DOI:10.19328/j.cnki.2096-8655.2025.S1.027
点式分离机构界面刚度等效建模与试验研究
Study on Equivalent Modeling and Experiment for Interface Stiffness of Point-Type Separation Mechanisms
潘望白 1张哲源 1欧阳涵1
作者信息
- 1. 上海宇航系统工程研究所,上海 201109
- 折叠
摘要
Abstract
The point-type separation mechanism is widely used in launch vehicle-satellite separation interfaces.The stiffness characteristics of its connection and release assembly are one of the key factors affecting the fundamental frequency of satellites,while the nonlinear behavior complicates the dynamic analysis.By performing nonlinear static simulations that account for contact and preload effects,the variation of local stiffness with load is quantified.The local stiffness under specific loads is then equivalently linearized as the assembly's dynamic stiffness modeled by Timoshenko beams.Through a set of simulated satellite,comparative studies between simulation and experiment test are conducted.The test reveals a consistent trend that both assembly stiffness and the combined structure's fundamental frequencies decrease with the increasing load.The simulation results align well with the test data,validating the effectiveness of using load-dependent local stiffness as an equivalent linearized parameter.This approach provides a feasible method for equivalent interface stiffness modeling in satellite dynamic analysis with point type separation mechanisms.关键词
点式分离机构/梁单元/非线性刚度/界面刚度Key words
point type separation mechanism/beam element/nonlinear stiffness/interface stiffness分类
航空航天引用本文复制引用
潘望白,张哲源,欧阳涵..点式分离机构界面刚度等效建模与试验研究[J].上海航天（中英文）,2025,42(z1):219-226,8.
