起重机械立柱的局部屈曲失效分析与模型试验

Local buckling failure analysis and model test of hoisting machinery column

局部屈曲失效是起重机械立柱结构失效的一种形式,对立柱结构的稳定性和安全性有着重要影响。针对起重机械立柱结构,基于薄板小挠度屈曲理论,对立柱薄板进行了局部屈曲失效分析,推导出均匀受压四边简支薄板的理想弹塑性屈曲载荷临界力和临界应力公式;利用ANSYS有限元分析软件,对立柱结构的薄板屈曲现象进行仿真,并且结合模型试验对失效现象进行了实物验证和对比分析。研究结论可作为起重机械立柱结构设计和安全校核的技术参考。

Local buckling is a failure form of hoisting machinery column structure,which has an important influence on the stability and safety of hoisting machinery. Based on the small deflection buckling theory of thin plate,critical force and critical stress formulas of buckling load of thin plates was deduced. The buckling of thin plates was simulated by ANSYS finite element analysis software,and the failure phenomena were verified and compared with the result of model test. The conclusion of this study can be used as a technical reference for the structural design and safety check of hoisting machinery column structure.