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In order to study the coupling effect of the equipment and the launching site during the erecting process of the vehicle missile system, the lumped parameter model of the multi-stage hydraulic cylinder is deduced, the flexible multi-body dynamic model is established in ADAMS, and the normal and tangential coupling forces in the coupling relationship are derived. The coupling calculation model of the weapon system and the launching site is established in the co-simulation of the ADAMS and MATLAB/Simulink. The results show that the vertical slip of the launching platform is much greater than longitudinal and lateral ones. The erection angles of the cylinders at all levels when they begin to extend are 0°, 22.16°, 43°, and 65.52°, respectively, of which the speeds are 50 mm/s or so, and there are little limit impacts between the cylinders. The thickness of the surface layer has greatest influence on the stability and security of the launching platform, followed by the thickness of the base layer as well as the elastic moduli of the surface layer and the base layer. The conclusion provides important theoretical basis for the selection of the unsupported launching site

The coupling effects of the missile launcher and the ground in vehicle-mounted missile erecting