【摘要】 分析了求解一般系统应力谱的过程,在应力谱计算中提出了单位应力矩阵的概念,解决了由系统随机响应计算应力功率谱密度的问题,并讨论其在一般情况下的存在性.最后用一个算例说明文中提出方法的有效性.更多还原

【Abstract】 The key to analyzing the fatigue life of a random vibration system is to determine its stress power density spectra (SPDS) at the fatigable position of load bearing components. A method called unit stress matrix method is proposed in this paper to calculate the SPDS of nonselfvibration components in a random vibration system. The existence of the unit stress matrix is discussed. An example is presented to show the effectiveness of the proposed method and the procedure of calculation.更多还原