集装箱液体包装袋有限元分析及优化设计

Finite Element Analysis and Optimization Design of Flexitank

目的研究液袋的长度、厚度及装载不同粘度的液体对液袋撕裂行为的影响。方法利用CATIA软件,建立不同长度、厚度和装载不同粘度液体的集装箱液袋模型;基于ABAQUS软件,在静态和动态下对集装箱液袋进行模拟。结果经过模拟分析,得到了液袋的应力、应变、应变能密度和最大撕裂能。正交分析选出最佳方案后,计算出静态下最大应变为0.064 77,最大应变能密度为0.1928×10^(-3) J/mm^3,最大撕裂能为0.1868 J/mm^3;动态下最大应变为0.063 04,最大应变能密度为0.1885×10^(-3) J/mm^3,最大撕裂能为0.1828 J/mm^3。结论结晶度较低PE膜的撕裂主要与薄膜的最大撕裂能有关,通过增大液袋长度可相应降低PE层顶部的最大撕裂能,提高液袋的安全性能。动态下液袋PE层顶部的撕裂破损是液袋损坏的主要原因。

This work aims to study the effects of length, thickness and different viscosity liquid of film on tearing of flexitank. CATIA software was used to establish a flexitank model with different lengths, thicknesses and different liquid viscosity. The flexitank was simulated under static and dynamic conditions with the ABAQUS soft. After simulation analysis, data on stress, strain, strain energy density and maximum tear energy of the flexitank were obtained. After selecting the best solution by orthogonal analysis, the maximum strain under static was 0.064 77, the maximum strain energy density was 0.1928×10^-3 J/mm^3, the maximum tear energy was 0.1868 J/mm^3, and the maximum strain under dynamic was 0.063 04. The strain energy density was 0.1885×10^-3 J/mm^3 and the maximum tear energy was 0.1828 J/mm3. The tear of the PE film with lower crystallinity is mainly related to the maximum tearing energy of the film. Increasing the length of the flexitank can reduce the maximum tearing energy at the top of the PE layer and improve the safety performance of the flexitank. The tearing at the top of the PE layer of the flexitank under dynamic conditions is the main cause of damage to the flexitank.