At present, the power spectrum method in the field of random vibration analysis, that is, to calculate the power spectrum of various responses from the given excitation power spectrum, has developed into a mature method. However, this method has not been widely used in engineering design in the past. The purpose of this paper is to study the efficient algorithm of multi-dimensional and multi-point random seismic response analysis of spatial grid structure. Firstly, the paper introduces the quick assessment of earthquake personnel loss from the aspects of the factors affecting the magnitude of earthquake disaster and the assessment process of earthquake personnel loss. Then, it further discusses the theoretical formula of multi-dimensional virtual excitation method, further extends the “virtual excitation method” to the multi-dimensional multi-point non-stationary random earthquake response analysis of spatial grid structure, gives the peak response estimation method, and discusses the multi-dimensional ground, the random model of vibration and the selection of parameters, the random seismic response of latticed shell structure is analyzed by special computer program. The experimental results show that the non-stationary random seismic response of the latticed shell is slightly smaller than that of the stationary random seismic response, with a ratio of about 0.9. The laws of the steady and non-stationary random vibration response of the latticed shell members are similar.

Xiaoyong Zhang. An Efficient Algorithm for Multi-dimensional and Multi-point Random Seismic Response Analysis of Spatial Grid Structure based on Computer. International Journal of Multimedia Computing (2023), Vol. 4, Issue 1: 69-85. https://doi.org/10.38007/IJMC.2023.040105.

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