摘要
响应谱矩对于系统的特性预测来说是十分有用的信息.通常,谱矩都是用频域法来计算的.在现有的文献中,有关的分析结果或只涉及到经典阻尼情形,或只对白噪声激励情形进行了讨论;对于限带白噪声激励情形都没有讨论过.本文通过时域模态分析,提出了一种计算响应谱矩的新方法.这种方法既能用于经典阻尼情形,也能用于非经典阻尼情形;并适用于三种典型随机激励,即白噪声、限带白噪声和滤过白噪声激励.
Response spectral moments are useful information for system performance prediction. Usually, spectral moments are calculated by the frequency domain method. Among the existing references some related analytical results are restricted to the classical damping cases; some are restricted to the white noise excitation; and none deals with the band-limited white noise excitation. By using the time domain modal analysis, the authors suggest a new method for calculating the response spectral moments, which can apply to both classical and non-classical damping cases and to all three kinds of random excitations, i.e. white noise, filtered white noise, and band-limited white noise.
出处
《力学学报》
EI
CSCD
北大核心
1989年第1期65-74,共10页
Chinese Journal of Theoretical and Applied Mechanics
基金
国家自然科学基金
关键词
响应谱矩
复模态
白噪声
随机振动
Response spectral Moments, White noise, Complex Modal Analysis.
