摘要
基于任意拉格朗日-欧拉有限元(ALE)方法处理液体大幅晃动问题,并系统地建立了航天器刚-液耦合动力学的数值模型。通过液体受惯性力、刚体受流体作用力与力矩来实现系统的耦合,采用交错算法对液体晃动模块与刚体动力学模块进行迭代求解。将刚-液耦合系统的数值计算结果与物理试验及液体刚化计算结果进行了比较,验证了本文方法的适用性和准确性。成功通过数值仿真观察到耦合系统中贮箱横向振动的非线性软弹簧特性、液体的高阶模态响应,并分析了液体晃动对耦合系统的影响。
The numerical model for the liquid-filled coupling dynamics of spacecraft is established based on the arbitrary Lagrangian-Eulerian finite element(ALE)method.The coupling effect is realized by exerting inertia forces to the liquid and sloshing forces and moments to the rigid body.The staggered algorithm is adopted to solve the liquid-sloshing module and the rigid body module in an iterative way.Parts of the results of the numerical simulations are compared with those in literatures,and the proposed methods in this dissertation are proved to be applicable and accurate.The soft spring nonlinear characteristics during the lateral oscillation of the tank and the high-order mode of the liquid are observed in the numerical simulations successfully.The influences of the liquid sloshing on the coupling system are analyzed.
作者
岳宝增
马伯乐
唐勇
刘峰
YUE Bao-zeng;MA Bo-le;TANG Yong;LIU Feng(School of Aerospace Engineering,Beijing Institute of Technology,Beijing 100081,China;College of Electronics and Information Engineering,Shenzhen University,Shenzhen 518000,China;China Academy of Space Technology,Beijing 100094,China)
出处
《宇航学报》
EI
CAS
CSCD
北大核心
2022年第2期173-182,共10页
Journal of Astronautics
基金
国家自然科学基金(12132002,11772049)。
关键词
耦合动力学
充液航天器
液体大幅晃动
有限元方法
球形贮箱
Coupling dynamics
Liquid-filled spacecraft
Large-amplitude liquid sloshing
Finite element method
Spherical tank
