弯管弯曲仿真中的芯棒结构建模

针对芯棒结构的特殊性与多样性而引起的芯棒结构在弯管弯曲过程仿真时建模不唯一性的现象，探讨了芯棒结构的作用机理，提出了刚体球铰接、刚体销铰接、超弹体连接3种建模方法；根据同一芯棒不同分析模型的仿真效果，提出了芯头的仿真模型应根据具体的研究对象而采用不同的芯棒模型的仿真建模策略；结果表明该策略有助于提高仿真效率，避免仿真建模时的盲目性，有利于对不同要求的研究对象进行有针对性的研究。

Modeling Study of Mandrel Structures in the Simulation of Tube Bending

For the phenomenon of particularity and diversity of mandrel structure which resulting in its non-uniqueness ofsimulation modeling at the pipe bending process. the mechanism of mandrel structure was discussed. and three modelssuch as rigid ball hinge, rigid pin hinge, super-elastic connecting were proposed; According to the simulation effects ofdifferent models with same mandrel, it was proposed that different mandrel models should be used depending on theresearch object; The results show that the strategy can help improve simulation efficiency, avoid blindness of simulationmodeling, and beneficial to have specific research with different requirements.