宽带随机谱下一种实用的等效应力计算模型  

A practical model of equivalent stress range calculation under broad band random loading

作　　者：吕澎民[1] 赵邦华[1] 严隽耄[1] 

机构地区：[1]西南交通大学,兰州铁道学院

出　　处：《甘肃工业大学学报》1996年第3期75-82,共8页Journal of Gansu University of Technology

摘　　要：以平稳Ｇａｕｓｓｉａｎ随机载荷下峰值应力概率分布的统计理论为基础，建立了一种实用的宽带随机载荷谱下等效应力计算模型．计算结果表明：该模型与精确模型在整个计算范围内均能良好吻合，较国际上已有的几种近似模型有更大的适应范围和更高的精度．A practical model of equivalent stress range calculation under broad band random loding,based on the statistical theory of the peak distribution of a stationary Ganssian random process is proposed. The calculation results show that the model agrees quitely with the exact model within the whole calculation range.Comparing with several existent models,it is found that the model has wider suitabe range and higher pricision.

关 键 词：随机载荷 等效应力 疲劳寿命 计算模型 

分 类 号：O346.2[理学—固体力学]