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一、前言 所谓系统的最不利反应,就是在某个限定的输入函数范围内,寻求一个输入,它在这个限定范围内的所有输入中,使系统产生最大的反应,这个反应就叫做最不利反应,相应的输入叫做最不利输入。 系统的最不利反应与输入函数的限定范围有关,输入函数的限定范围不同,同一系统相应的最不利反应是不一样的。Drenik和Shinozuka曾分别从“输入函数的总能量不大于某个值”和“输入函数福里哀谱的幅值不大于某个频率函数”来限定输入函数的范围,并
I. INTRODUCTION The most unfavorable reaction of the so-called system is to seek an input within a defined range of input functions. In all inputs within this limited range, the system produces the greatest response. This reaction is called the most adverse reaction. The corresponding input is called the worst input. The most unfavorable reaction of the system is related to the limited range of the input function. The limited range of the input function is different, and the corresponding most adverse reaction of the same system is not the same. Drenik and Shinozuka once defined the scope of the input function from “the total energy of the input function is not greater than a certain value” and “the amplitude of the input function Fourier’s spectrum is not greater than a certain frequency function”, and