In order to analyze the dynamic characteristics of the missile road transportation system, a multi-body coupled dynamics model is constructed for “transportation vehicle - packing box - bomb body - missile component”. Firstly, the dynamic model of transportation vehicle and missile components is established according to Newton's second law, the missile body is divided into three units, the flexible body dynamic model is established based on the theory of Euler-Bernoulli beam with variable cross section and the finite unit method, and the rigid-flexible coupling dynamics equations of “Transportation Vehicle-Packing Box-Bullet-Missile Components” are constructed through the principle of matching the degrees of freedom, and the state-space equations are deduced. Then, the model parameters are determined and the numerical simulation model is constructed using Matlab/Simulink platform. Finally, the sinusoidal sweep test is carried out on the road simulation test bed for model validation. The test results show that the displacement curves and amplitude-frequency characteristic curves are in good agreement, and the simulation peak errors at 3Hz and 5Hz frequencies are 1.67% and 2.83%, respectively, and the root-mean-square errors are 1.88% and 4.95%, respectively, which verifies the validity of the model. The model provides a reliable theoretical basis for the evaluation of the dynamic characteristics and optimal design of the missile road transportation system.

Yongyong Yan, Qihui Ling, Zeyu Li. Modeling and Experimental Study on Rigid-flexible Coupling Dynamics of Missile Road Transportation. Academic Journal of Engineering and Technology Science(2025), Vol. 8, Issue 2: 68-75. https://doi.org/10.25236/AJETS.2025.080209.

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