摘要：【中文】本发明涉及一种用于确定在工艺工程装置(1)的材料中的不同的第一位置处普遍存在的机械应力(304)的数量的方法，其中在工艺工程装置(1)的材料中的不同的第一位置处普遍存在的机械应力(304)的数量是使用经验模型(M3)由工艺工程装置的材料中的不同的第二位置处普遍存在的温度(301)的数量确定的，经验模型(M3)通过训练数据(207′)进行训练，该训练数据是使用工艺工程装置(1)的热液压工艺模拟模型(M1)和结构力学模型(M2)导出的。 【EN】The invention relates to a method for determining the amount of mechanical stress (304) prevailing at different first locations in a material of a process-engineering plant (1), wherein the amount of mechanical stress (304) prevailing at different first locations in the material of the process-engineering plant (1) is determined from the amount of temperature (301) prevailing at different second locations in the material of the process-engineering plant using an empirical model (M3), the empirical model (M3) being trained using training data (207') derived using a thermo-hydraulic process simulation model (M1) and a structural mechanical model (M2) of the process-engineering plant (1).