战术导弹结构动力学灵敏度分析研究

Study on the structural sensitivity analysis of the tactics missile

研究了战术导弹的结构动力学频率灵敏度、振型灵敏度分析技术。首先,给出了结构模态灵敏度分析的理论和计算公式。然后,给出了某型导弹的结构动力学分析有限元模型。最后,分析了战术导弹各连接面刚度对全弹振动频率和振型的灵敏度。研究发现处于结构振型波峰或者波谷的中部连接面的刚度对全弹模态影响较大。该方法为模型修正和结构设计提供了参考。

The frequency and shape sensitivity analysis of the tactics missile are investigated. Firstly, the theory and the formula of the mode sensitivity analysis are put forward. Secondly, a tactics missile’ FEM model is established. At last, the frequency and shape sensitivity to stiffness of the connecting surfaces are studied.It is found that the connecting surface which is located at the wave crest or trough of the shapes and the middle of the missile influences the modes of the missile obviously. The analysis method can support the model update and structure design.