光弹性确定复合型应力强度因子K_Ⅰ和K_Ⅱ的误差分析

来源期刊：中南大学学报(自然科学版)1994年第2期

论文作者：伍洪泽

文章页码：248 - 251

关键词：误差分析; 模型误差; 观察误差; 截断误差; 舍入误差

Key words：error analysis; model error; observational error; truncate error; round-off error

摘    要：复合型应力强度因子K_Ⅰ和K_Ⅱ的光弹性测定值是K_Ⅰ和K_Ⅱ的近似值.本文提出了影响K_Ⅰ和K_Ⅱ精确值的误差有模型误差、观察误差、截断误差、及舍入误差,并对前二项误差做了详细分析,指出了确定误差的方法和计算公式,提出了减小误差的途径.

Abstract: The value of combinedstrests intensitv factor K_Ⅰ and K_Ⅱ determined by photoelasticityis an approximate value.In this paper,it is indicated that the errors which affect the exactvalue of K_Ⅰ and K_Ⅱ are model error,observational error,truncate error and round-off error.Adetailed analvsis is made to the model error and observational error.The method of defin-ing errors and calculation formula are given and the way of decreasing errors is suggested.