| 弹性-粘弹性复合结构随机响应的各阶谱矩的计算方法 |
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| 引用本文： | 冉志,张天舒,方同.弹性-粘弹性复合结构随机响应的各阶谱矩的计算方法[J].振动工程学报,2003,16(3):363-367. |
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| 作者姓名： | 冉志 张天舒 方同 |
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| 作者单位： | 1. 东华大学理学院,上海,200051
2. 西北工业大学工程力学系,西安,710072 |
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| 摘 要： | 提出了一种新的计算弹性-粘弹性复合结构随机响应的各阶谱矩的计算方法，它是一种时域复模态分析方法。利用此方法获得了弹性-粘弹性复合结构在白噪声、滤过白噪声等典型平稳随机激励下随机响应的各阶谱矩的解析表达式，分析了粘弹性对各阶谱矩的影响。此计算方法简便、易用，无论单自由度或多自由度系统均适用，为进一步研究弹性-粘弹性复合结构在随机激励下的可靠性打下良好基础。
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| 关 键 词： | 弹性-粘弹性复合结构 随机振动 计算 可靠性 随机响应 谱矩 |
| 修稿时间： | 2002年6月13日 |
Calculation of Random Response Spectral Moments of Elastic-Viscoelastic Combined System |
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| Ran Zhi Zhang Tianshu.Calculation of Random Response Spectral Moments of Elastic-Viscoelastic Combined System[J].Journal of Vibration Engineering,2003,16(3):363-367. |
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| Authors: | Ran Zhi Zhang Tianshu |
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| Abstract: | In the analysis of reliability of system under random excitations, the spectral moments of response are very important parameters. Usually, the spectral moments are obtained by the frequency domain methods. In this paper, a new method of calculating random response spectral moments of elastic-viscoelastic combined systems under random excitations is presented . which is a method of complex modal analysis in time domain. By this means, the spectral moments of elastic-viscoelastic combined systems under typical stationary random excitations, such as white noise, filtered white noise are obtained in analytical forms. In addition, the influence of viscoelastic on spectral moments is analysed. The method is simple and easy to apply to SDOF or MDOF systems. |
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| Keywords: | random vibration elastic-viscoelastic combined system spectral moment |
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