| 结构非平稳随机响应的增维精细时程积分 |
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| 引用本文： | 张文首,林家浩,刘婷婷,于骁.结构非平稳随机响应的增维精细时程积分[J].振动与冲击,2006,25(5):18-20. |
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| 作者姓名： | 张文首 林家浩 刘婷婷 于骁 |
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| 作者单位： | 大连理工大学工程力学系工业装备结构分析国家重点实验室,大连,116024 |
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| 摘 要： | 对于不同形式的均匀调制演变随机激励，给出计算线性多自由度体系非平稳随机响应的增维精细时程积分法。先用虚拟激励法将随机荷载化为确定性荷载，然后把确定性荷载用状态方程表示，进而构造出形式统一的增维精细时程积分格式。算例表明，本文方法不仅与混合型精细时程积分格式具有同样的精度，而且计算效率更高。
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| 关 键 词： | 非平稳随机振动 演变 精细时程积分 随机激励 随机响应 |
| 收稿时间： | 08 2 2005 12:00AM |
| 修稿时间： | 10 18 2005 12:00AM |
Precise Time-Integration Method with Augmented Matrix for Analysis of Non-Stationary Random Responses |
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| Zhang Wenshou,Lin Jiahao,Liu Tingting,Yu Xiao.Precise Time-Integration Method with Augmented Matrix for Analysis of Non-Stationary Random Responses[J].Journal of Vibration and Shock,2006,25(5):18-20. |
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| Authors: | Zhang Wenshou Lin Jiahao Liu Tingting Yu Xiao |
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| Abstract: | A precise time-integration scheme with augmented matrix for analysing the non-stationary random responses of linear MODF structures to various uniformly modulated evolutionary random excitations is proposed. The random excitations are transformed into pseudo excitations expressed in the state equations before the resulting deterministic equations of motion are solved by the proposed precise time-integration scheme with augmented matrix and in unified form. The numerical results show that the scheme proposed herein has the same accuracy as High-Precision Integration of Mixed Type, however is more efficient. |
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| Keywords: | non-stationary random vibration evolution precise time-integration random excitation random response |
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