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研究了不同梁模型对战术导弹结构动力学特性的影响。首先,给出了三种梁模型,其中包括一种欧拉梁模型和两种铁木辛克梁模型。其次,基于模型战术导弹的初始数据,建立其有限元模型。最后,基于给出的三种梁模型计算了导弹的模态,并与试验数据对比。研究发现,欧拉梁模型在预示导弹低阶模态时,精度较好,但在高阶时不如铁木辛克梁模型,且使用变剪切系数的铁木辛克梁的模型模态预示结果更加接近试验结果。
The effect of different beam models on the dynamic characteristics of tactical missile structures was studied. First, three kinds of beam models are given, including one Euler beam model and two kinds of Timoshenko beam models. Secondly, based on the initial data of the model tactical missile, the finite element model is established. Finally, the modal of the missile is calculated based on the given three beam models and compared with the experimental data. The study shows that the Eulerian beam model is more accurate in predicting the low-order modes of missiles, but not as good as the Timoshenko beam model at higher orders, and the model modal prediction of the Tiemunsik beam using the variable shear coefficient is closer to the test result.