正态与对数正态应力—强度模型下求取可靠度的计算机辅助图解法

Use computer aided graphic method to obtain degree of reliability with the model of normal and lognormal strain-stress

可靠度是概率设计的一项定量可靠性指标，本文介绍了一种根据正态与对数正态应力—强度模型求取可靠度值的计算机辅助图解法。通过高级语言与数据库的数据传递，编写与ＡｕｔｏＣＡＤ的接口程序。在ＡｕｔｏＣＡＤ工作环境下，借助Ａｕｔｏｌｉｓｐ功能，实现了图形的自动生成及未知图解参数的自动求解。该方法对机械构件的可靠性设计的全过程ＣＡＤ化，具有一定的应用价值。

Abstract As the degree of reliability is a quantitative reliability target in probability design,so in this paper,the computer aided graphic method is intruduced to obtain degree of reliability with model of normal and lognormal strain stress.By data transmit of high-level language and data base,edit interface program to Auto CAD.By Auto CAD,with function of Autolisp to realize auto-formation and auto derivation of unknown graphic parameter.This method possesses a certain utility value to CAD of reliable design of mechanical components.