【摘要】 对存在接触、摩擦和预紧等非线性因素的螺栓连接结构有限元建模方法进行对比研究,建立了面向某型导弹舱段径向连接结构的求解效率高、适用性强的有限元模型,并分析求解。研究从不同形式的连接结构建模策略和螺栓预紧力施加手段两方面展开,通过基础平板连接结构,验证了4种组合建模方法的精度和有效性,对比优选出最优的建模方法。仿真结果表明,梁单元配合多点约束的建模方法配合直接施加法的预紧力施加方法,是一种可实现导弹舱段径向螺栓连接结构高效求解的有限元建模方法。本研究可作为导弹结构在方案设计阶段的理论基础,同时为下一步的结构优化设计提供有效的技术支持,具有一定的工程应用参考价值。更多还原

【Abstract】 The modeling methods of the bolted connection structure,which contains some nonlinear factors such as contact,friction and preload was stuidied,and an efficient method with wide range of application was proposed. How to establish bolted connection and how to add preload are two main parts in the study. It demonstrates the accuracy and the effectiveness of four combined methods and chooses the best one from them through a test connection structure. The results show that it is high efficient to use the beam element with adding preload directly to analyze the radially bolted connection between missile cabins. The study provides the theoretical basis of the structural design in scheme design stage of a missile,an effective technical support for further structural optimization design,and a certain reference value for engineering applications.更多还原