| 基于ALE有限元方法的充液刚体耦合动力学仿真 |
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| 引用本文： | 周宏,李俊峰,王天舒.基于ALE有限元方法的充液刚体耦合动力学仿真[J].清华大学学报(自然科学版),2008,48(11). |
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| 作者姓名： | 周宏 李俊峰 王天舒 |
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| 作者单位： | 清华大学,航天航空学院,北京,100084 |
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| 基金项目： | 国家自然科学基金
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| 摘 要： | 假设液体是不可压缩的粘性液体,用Jourdain形式的普遍动力学原理建立充液系统的动力学控制方程,并采用交替积分法求解此数值计算模型.液体模块采用Lagrange-Euler描述方法建立有限元计算模型;充液刚体模块利用二阶显式Runge-Kutta格式离散的常微分方程组.在刚-液耦合界面将传递系统质心、转动惯量、晃动力、晃动力矩以及惯性力等耦合物理量.计算结果表明该方法能正确地反映充液耦合系统的运动学特征.与假设液面未扰充液系统的响应结果相比,耦合计算获得的结果具有较大幅度的角速度响应.
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| 关 键 词： | 刚-液耦合动力学 液体晃动 ALE有限元方法 |
Dynamics simulation of a fluid-filled coupling system using the ALE finite element method |
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| ZHOU Hong,LI Junfeng,WANG Tianshu.Dynamics simulation of a fluid-filled coupling system using the ALE finite element method[J].Journal of Tsinghua University(Science and Technology),2008,48(11). |
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| Authors: | ZHOU Hong LI Junfeng WANG Tianshu |
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| Institution: | ZHOU Hong,LI Junfeng,WANG Tianshu(School of Aerospace,Tsinghua University,Beijing 100084,China) |
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| Abstract: | The kinematical and kinetic characteristics of a rigid-liquid interaction system were numerically simulated with the assumption that the fluid is incompressible and viscous.The dynamical equations of a liquid-filled tank were deduced using Jourdain principle,including the momentum and angle momentum equations for the coupling system and Navier-Stokes equations for the liquid sloshing.The arbitrary Lagrangian-Eulerian(ALE) finite element method was used to simulate the flows in the tank for moving free surfa... |
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| Keywords: | rigid-liquid coupling dynamics liquid sloshing arbitrary Lagrangian-Eulerian(ALE) finite element method |
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