| 陈成,刘锦阳,许艳涛,谢永诚.控制棒驱动机构步跃提升碰撞的动力学建模[J].计算力学学报,2017,34(3):267~273 |
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| 控制棒驱动机构步跃提升碰撞的动力学建模 |
| Dynamic modeling for the impact of control rod drive mechanism under step loads |
| 投稿时间：2016-02-05 修订日期：2016-05-24 |
| DOI：10.7511/jslx201703001 |
| 中文关键词: 控制棒驱动机构 刚柔耦合多体动力学 接触碰撞 罚函数法 数值仿真 |
| 英文关键词:control rod drive mechanism rigid-flexible coupling contact-impact penalty method numerical simulation |
| 基金项目:国家自然科学基金（11272203，11132007）；民口专项（ZB01K03W02）资助项目 |
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| 摘要点击次数: 1829 |
| 全文下载次数: 1931 |
| 中文摘要: |
| 控制棒驱动机构（CRDM）在步跃提升时，钩爪部件会与承压壳体上的提升磁极发生面面碰撞。本文基于混合坐标法建立控制棒驱动机构有限元离散的刚-柔耦合动力学方程，用罚函数法计算了钩爪部件与承压壳体之间的碰撞力和应力分布情况。结果表明，刚柔耦合多体方法在仿真小变形碰撞时可以提高计算效率，同时又能达到与有限元方法同等的精度。进一步对碰撞模型不同区域的网格疏密和尺寸大小做了定量分析，得到了降低有限元网格数量的方法，可为工程中碰撞模型的网格划分提供参考。 |
| 英文摘要: |
| Under step loads,contact-impact may occur between the pole and housing of the control rod drive mechanism.Based on the formulation in the floating frame of reference discretized equations of motion for the rigid-flexible coupled structure are derived,and penalty method is used for calculating the impact force and the stress distribution of the housing.Compared with the finite element method,the rigid-flexible coupling method can greatly improve the computational efficiency while maintaining the same accuracy.Furthermore,in order to reduce the number of finite elements used,the finite element mesh size of different regions of the structure is analyzed quantitatively.The conclusion can provide a good guideline for contact-impact analysis in engineering. |
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