响应面法计算结构的可靠度.已知极限状态方程，变量服从对数正态分布，变量均值和标准差已知。-Response surface methodology to calculate the reliability of structures known to limit state equation, variables lognormal distribution, the mean and the standard deviation is known variables.

该程序使用了4点雨流方法实现汽车耐久试验的载荷分布计算，计算均值和范围(The program uses 4-point rainflow method to calculate the load distribution of vehicle durability test.)