## 留言板

 引用本文: 王宇楠, 邢誉峰. 变质量梁的自适应Newmark法[J]. 北京航空航天大学学报, 2014, 40(6): 829-833.
Wang Yunan, Xing Yufeng. Self-adaptive Newmark method of variable-mass beam dynamic system[J]. Journal of Beijing University of Aeronautics and Astronautics, 2014, 40(6): 829-833. doi: 10.13700/j.bh.1001-5965.2013.0400(in Chinese)
 Citation: Wang Yunan, Xing Yufeng. Self-adaptive Newmark method of variable-mass beam dynamic system[J]. Journal of Beijing University of Aeronautics and Astronautics, 2014, 40(6): 829-833. (in Chinese)

• 中图分类号: O342

## Self-adaptive Newmark method of variable-mass beam dynamic system

• 摘要: 用变质量梁来模拟推进剂减少的液体火箭.先以一弹簧-变质量小球系统为例，用其求解结果与解析解进行比较.再以时不变的简支梁为算例，确定多自由度系统下与结构动特性协同的自适应Newmark方法中的参数选取.最后用时变的简支梁模型模拟贮箱质量的实际变化方式，运用与结构动特性协同的自适应Newmark方法、模态叠加法、Newmark平均加速度方法（NMA法）和Fox-Goodwin方法（NMF法）对其求解.比较结果证明自适应Newmark算法对于时变系统的适用性，尤其具有高精度特性.

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##### 出版历程
• 收稿日期:  2013-07-04
• 网络出版日期:  2014-06-20

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