在地震作用下结构的模糊随机振动

地震干扰不仅具有明显的随机性,而且由于地震烈度和场地土分类本身定义不明确而带来强烈的模糊性,本文在上述模糊性和随机性的基础上,建立了地震地面运动含模糊参数的平稳过程简化模型,研究了在其作用下单自由度滞后体系的模糊随机振动的分析与计算方法,由于问题的复杂性和某些数学上的困难,文中作了一些必要的简化,以作为模糊随机振动理论的初步探讨。

FUZZY RANDOM VIBRATION OF STRUCTURES SUBJECTED TO EARTHQUAKE

Earthquake excitation possesse not only evident randomness but also strong fuzziness resulted from the uncertainties in the definitions of the earthquake intensity and the sue loil classification. In this paper, the ground motion during an earthquake is idealized as a simplified model of a stationary filtered white noise with fuzzy parameters and a method is presented for analyzing the fuzzy random vibration of single-degree-of-freedom hysteretic system subjected to this kind of excitation. Because of the complexity and some difficulties in mathematics of the problem under consideration, some necessary simplifications have to be made in order to establish the preliminary theory of fuzzy random vibration.