摘要
随机振动理论与有限元方法相结合而产生的随机响应分析方法,广泛适用于工程结构在受到多个随机力激励或随机运动激励时的响应分析。已经编制的多点随机激励响应分析程序(DSJX),在例题考核和工程应用中的结果都十分令人满意。计算时,除结构本身的数据外,只须提供具有平稳性和各态历经性的激励信号的功率谱。分析方法中既包含了模态互相关,又包含了激励信号的互相关,从而保证了方法的分析精度。
The random response analysis method developed by combining the theory of random vibration and the finite element method is widely adequate for the response analysis of engineering structures subjected to multiple-force or multiple-displacement excitation. The cofresponding computer program produced is satisfactory in the testing of examples and in the engineering applications. Beside the data of the structure, the power spectra of excitation signals which are all stationary and ergodic should be provided. The cross-correlations of the modal response and the cross-correlations of the multiple excitationsignals are considered in order to ensure the calculating accuracy.
关键词
随机振动
有限元
工程结构
random vibration
finite element method
engineering structure
