【摘要】 本文介绍随机应力的测试和数据处理方法．以客车车身骨架作为例子，讨论了概率密度函数、自相关函数和功率谱密度函数，并利用这些函数来分析和讨论客车的动力特性，骨架的疲劳损伤和疲劳寿命．更多还原

【Abstract】 This paper presents a method of measuring the randomly varying stress and analysing the digital signal. Herein we take the bus carcase as an exa- mple .The probability density function, the autocorrection function, and the meansquare spectral density are considered. By using those functions we ana- lyse and discuss the dynamic properties of the bus, and the damage and life in fatigue of the carcase.更多还原