abaqu cae中作梁的分析时可否定义不规则的profile形状？

三角形，梯形这种，用arbitrary profile 就行了。更复杂的截面，需要操作INP。可以在帮助文档中搜索“Meshed cross-sections”：

Meshed cross-sections:

• allow for the description of a beam cross-section including multiple materials and complex geometry;