| 基于离散小波变换的多自由度结构非平稳随机响应计算 |
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| 引用本文： | 樊剑,唐家祥. 基于离散小波变换的多自由度结构非平稳随机响应计算[J]. 振动工程学报, 2001, 14(4): 438-442 |
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| 作者姓名： | 樊剑 唐家祥 |
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| 作者单位： | 华中科技大学土木系, |
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| 摘 要： | 将地面运动模拟成非平稳随机过程，基于离散小波变换得到地面运动离散小波系数的统计值，并以此作为输入，推导了多自由度结构和随机响应公式，通过对响应偏谱的计算，得到随时间变化的响应频率特性和名阶谱参数，利用Monte-Carlo法和本文方法进行了计算实例对比，验证了本文方法的正确性。
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| 关 键 词： | 非平稳随机振动 随机响应 离散小波变换 多自由度结构 计算 |
| 修稿时间： | 2000-06-05 |
Non-Stationary Seismic Response of MDOF Structures Using Discrete Wavelet Transform |
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| Fan Jian Tang Jiaxiang. Non-Stationary Seismic Response of MDOF Structures Using Discrete Wavelet Transform[J]. Journal of Vibration Engineering, 2001, 14(4): 438-442 |
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| Authors: | Fan Jian Tang Jiaxiang |
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| Abstract: | A discrete wavelet based formulation is presented in this paper for the stochastic analysis of a linear MDOF damped structure subjected to non stationary earthquake ground motion. Its characteristics in frequency domain and the moments of the instantaneous power spectral density function of the response are obtained using partial spectral analysis. Comparison between the results of Monte Carlo method and the method presented in this paper shows that the non stationary earthquake response of MDOF structures can be determined correctly by using the discrete wavelet based analysis. |
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| Keywords: | non stationary random vibration stochastic response discrete wavelet transform |
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