In finite element method, beam element and link element are basic elements when analyzing truss. But, the link has the initial defect more or less because of the manufacture and transport.

• 在进行结构分析的有限元分析中,梁单元和杆单元是采用杆系有限单元法分析的基本单元,但是,由于制造和运输、施工过程中的影响,杆件可能或多或少地存在初弯曲。