| 受非均匀调制演变随机激励结构响应快速精确计算 |
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| 引用本文： | 林家浩 张亚辉. 受非均匀调制演变随机激励结构响应快速精确计算[J]. 计算力学学报, 1997, 14(1): 2-8 |
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| 作者姓名： | 林家浩 张亚辉 |
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| 作者单位： | 大连理工大学工程力学研究所 |
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| 基金项目： | 国家自然科学基金,英国皇家学会资助 |
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| 摘 要： | 本文假定结构受到非均匀调制的演变随机激励，亦即其调制函数是时间与频率二者的函数，导出了有关的虚拟激励算法，并采用精细逐步积分格式，进行时变功率谱计算，获得了很高的计算效率和精度。
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| 关 键 词： | 调制 逐步积分 功率谱 随机振动 |
Fast and precise computation of structural responses to non uniformly modulated evolutionary random excitations |
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| Lin Jiahao,Zhang Yahui,Sun Dongke,Sun Yong. Fast and precise computation of structural responses to non uniformly modulated evolutionary random excitations[J]. Chinese Journal of Computational Mechanics, 1997, 14(1): 2-8 |
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| Authors: | Lin Jiahao Zhang Yahui Sun Dongke Sun Yong |
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| Abstract: | In this paper, the evolutionary random excitations acting on structures are assumed to be non uniformly modulated, i.e. the modulation functions depend both on time and frequency. The corresponding pseudo excitation method (PEM) is derived. By combining PEM with the High Precision Direct (HPD) integration scheme, the time dependent PSD of various structural responses can be computed precisely and very quickly. |
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| Keywords: | modulate random step by step integration power spectrum |
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