计算机与数字工程2018，Vol.46Issue(3)：437-444,458,9.DOI:10.3969/j.issn.1672-9722.2018.03.004
柔体系统动力学算法中的形函数选择问题研究
Research on Selection of Shap Function in Flexible Multi-body System Dynamics
赵洋 1王德石1
作者信息
- 1. 海军工程大学兵器工程系 武汉430033
- 折叠
摘要
Abstract
To precisely control and simulate the dynamics of a flexible-body system as well as to make the computation effec?tive,it is necessary to study how to select elastic body,s shape function.In a floating coordinate system,the Lagrangian equation is used to deduce the general dynamics equation for a flexible-body system.For three types of shape functions,the coefficient matrixes of the dynamics algorithm are compared to investigate the effects of the selected shape functions on computational accuracy and effi?ciency.Our study shows that the floating coordinate system has effect on the coupling degree of the equations while the computation?al accuracy and efficiency are mainly subjected to shape functions.Under the assumption of static deformation,the dynamics equa?tion are simple and the computational efficiency is the highest.For both the finite element model and the vibration modal model,the efficiency becomes low with increasing the number of the meshes and the number of the modal truncations. The form of the shape function depends on both the accuracy and the efficiency,which,however,are contradictory to each other.The shape function shall be appropriately and conditionally selected to simulate and control the dynamics of a flexible-body system.关键词
多柔体动力学/形函数/模态坐标/静力变形/浮动坐标Key words
flexible multi-body system dynamics/shape function/mode coordinates/static deformation/floating coordi⁃nate system分类
通用工业技术引用本文复制引用
赵洋,王德石..柔体系统动力学算法中的形函数选择问题研究[J].计算机与数字工程,2018,46(3):437-444,458,9.
