基于弹塑性力学的精馏釜结构优化分析

Structure Optimization Analysis of Distillation Kettle Based on Elastic-plastic Mechanics

基于弹性力学进行结构强度分析,由于设备结构不连续处存在较大的应力奇异性,使得计算结果与设备实际所承受的应力不相符。针对某精馏釜的实际设计和结构,基于弹塑性力学理论,通过建模、划分网格、施加载荷与约束,分析该精馏釜的应力分布,并对其壁厚和加强筋结构优化。计算结果表明,基于弹塑性力学的计算结果可靠,设计壁厚小于传统方法设计方法,符合ASMEVIII-2-2015《压力容器建造另一规则》要求。

Based on the analysis of structural strength by elastic mechanics, there is a large stress singularity due to the discontinuity of the equipment structure, which makes the calculation result not consistent with the actual stress of the equipment. According to the actual design and structure of a distillation reactor, based on the theory of elastic-plastic mechanics, through modeling, meshing, loading and constraint analysis, the stress distribution of distillation kettle is analyzed;and the wall thickness and stiffener structure are optimized. The results show that the calculation results are reliable and the design of wall thickness is smaller than the traditional method. It meets the requirements of ASME Ⅷ-2-2015 'another rule of pressure vessel construction'.