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为合理处理铁道车辆车体上的板梁组合结构,解决车体结构分析中典型的板梁偏心连接问题,构建了偏心节点的节点位移关系式,利用APDL语言实现了批量约束方程的施加;并根据ANSYS软件中梁单元、板单元、实体单元的基本特征构造了5种板梁组合结构模型,对它们进行了有限元分析及对比。研究结果表明:对于同一典型的板梁结构,用板梁偏心组合建模(单点约束)方案得到的模型与用实体建模方案得到的模型有限元分析结果比较接近,用全板壳建模的两种方案均相对实体单元模型约束稍强,而用板梁偏心组合建模(双点约束)方案得到的模型则约束过强;同时采用板梁组合建模的模型单元数和节点数相对较少,可以节省计算机时,降低计算费用。
In order to deal with the plate and beam combination structure of the railway car body reasonably, the typical plate beam eccentric connection problem in the structural analysis of the car body is solved, and the node displacement relation of the eccentric node is established. The application of the batch constraint equation is realized by APDL language. According to the basic characteristics of beam elements, plate elements and solid elements in ANSYS software, five kinds of beam-beam composite structure models are constructed, and their finite element analysis and comparison are carried out. The results show that for the same typical plate beam structure, the model obtained by the combination of plate and beam eccentric combination (single point constraint) is close to the finite element analysis result obtained by the solid modeling method, Both of the two schemes are slightly stronger than those of the solid element model, while the model obtained by the eccentric beam combination model (double-point constraint) is more constrained. The number of model elements and the number of nodes Less, you can save the computer, reduce the cost of computing.