充液航天器试验的三维数值分析  

Three-dimensional numerical analysis of liquid-filled spacecraft test

作　　者：曾江红[1] 王照林[1] 程建华[1] 董建令[1] 

机构地区：[1]清华大学工程力学系

出　　处：《清华大学学报（自然科学版）》1995年第2期76-81,共6页Journal of Tsinghua University(Science and Technology)

基　　金：国家自然科学基金;航天工业总公司五院资助

摘　　要：对自旋充液航天器地面气浮台试验的动力学特性进行了分析和计算。以刚体系统的动量矩定理和流体运动的基本方程为基础，考虑液体晃动、涡旋、重力、离心力及Ｃｏｒｉｏｌｉｓ力等因素的影响，并运用Ｐｆｅｉｆｆｅｒ推广的关于流体均匀涡旋运动的理论，导出了液体晃动的边值问题和流固耦合旋转系统运动的联立微分方程组。运用边界元方法求解了重力场中部分充液偏置贮箱内液体晃动的三维边值问题，并将系统运动的联立微分方程组交换后化为广义特征值问题来求解。从而求得液体晃动的能量耗散率和系统的章动时间常数。his paper investigates the dynamic characteristics of liquid motion in partially filled tanks of the spinning spacecraft ground test on an air-bearing table.Based on the theorems of moment of momentum of a rigid system and the basic equations of fluid,considering the influence of the liquid sloshing,vorticity of liquid,gravitation, centrifugal and Coriolis inertial forces, and using the theory of homogeneous vorticity introduced by Pfeiffer,the boundary value problem of liquid sloshing and the differential equations of the fluid-solid coupled system are derived. The boundary element method is applied to solve the three dimensional boundary value problem. The differential equations are transformed to a generalized eigenvalue problem to be solved.The dissipative rate of energy and the nutation time constant of the system are obtained.

关 键 词：充液航天器试验 液体晃动 航天器 数值分析 

分 类 号：V417.2[航空宇航科学与技术—航空宇航推进理论与工程]