使用workbench模拟软件,采用简化尸体模型,基于对84个样品尸体的冷却曲线的拟合、回归分析,发现并总结出冷却曲线与尸体几何形状、衣着和边界条件的规律性关系,利用该关系和现场一段时间的连续肛温测量曲线可获得尸体初始肛温值和PMI,由此该数值模拟法可改善PMI推断精度。 Based on fitting and regression analysis of the cooling curves of 84 samples, the workbench simulation software was used to simplify the model. The relationship between the cooling curves and body geometry, clothing and boundary conditions was found and summarized. Using this relationship and The results showed that the initial rectal temperature and PMI of the corpse were obtained from the continuous rectal temperature measurement curve at the scene for a period of time. Thus, the numerical simulation method can improve the PMI inference accuracy.