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| Rigid elements and their application in dynamics of multibody systems |
| Received:December 17, 2010 Revised:April 20, 2011 |
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| DOI：10.7511/jslx201104010 |
| KeyWord:multibody systems rigid elements moments of inertia |
| Author | Institution |
| 齐朝晖 |
大连理工大学 工业装备结构分析国家重点实验室,大连 |
| 方慧青 |
大连理工大学 工业装备结构分析国家重点实验室,大连 |
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| Abstract: |
| In many multi-body software based on the traditional theories of dynamics of multibody systems, parameters such as the mass, the center of mass and the moments of inertia of a body usually have to be given artificially, which results in many difficulties in practice applications, because these parameters are not easy to obtain especially when bodies are complicated in shape. This paper presented a methodology enables to overcome these difficulties. The main idea is to divide a body into many pieces with regular shape called rigid elements.Two kinds of element, the rigid beam element and the rigid tetrahedron element are constructed in this paper, with the consideration of their ability to represent any solid body. Based on the new methodology, a software with mesh generator was developed, which can obtain the inertia parameters of bodies with any shape automatically. The correctness of present rigid elements was verified by numerical examples. |
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