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飞机结构中确定连接紧固件传递载荷是强度校核的关键。文章基于MSC.NASTRAN对模拟紧固件连接的组合单元方法及其在板体单元混用模型中的应用进行研究,通过算例分析表明,组合单元法适用于板体单元混用模型,计算结果准确可靠。经算例比较,组合单元法所得螺栓剪力与工程方法计算结果较好吻合,可直接计算螺栓拉伸内力。
Determining the transfer load of the connecting fasteners in the aircraft structure is the key to strength check. Based on MSC.NASTRAN, a combined element method for simulating fastener connection and its application in mixed model of plate element are studied in this paper. The example analysis shows that the combination element method is suitable for the mixed model of plate element and the calculation result is accurate and reliable . After comparing the examples, the bolt shear obtained by the combined element method is in good agreement with the engineering method, and the bolt internal force can be directly calculated.