基于李群局部标架的多柔体系统动力学建模与计算 1)
DYNAMIC MODELING AND COMPUTATION FOR FLEXIBLE MULTIBODY SYSTEMS BASED ON THE LOCAL FRAME OF LIE GROUP 1)
基于李群局部标架的多柔体系统动力学建模与计算 1) |
| 刘铖, 胡海岩 |
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DYNAMIC MODELING AND COMPUTATION FOR FLEXIBLE MULTIBODY SYSTEMS BASED ON THE LOCAL FRAME OF LIE GROUP 1) |
| Liu Cheng, Hu Haiyan |
| 图17 开口球壳上$A$、$B$点的位移大小考虑到板壳单元惯性力与梁单元惯性力计算方法类似,本节中不再加以分析板壳结构的动力学问题. 由于局部标架的引入,板壳结构的单元质量矩阵与切线刚度矩阵满足刚体运动的不变性. 在数值计算中,六自由度的板壳单元质量矩阵与切线刚度矩阵的更新次数将急剧减少,具体数值性质可参考4.5小节中的大型桁架结构展开动力学模拟. |
| Fig.17 Magnitudes of displacements at nodes $A$ and $B$ of a hemispherical shell |
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