空投重物在水面迫降过程中由于水面冲击载荷较大，很容易致使重物坠毁。为了

It is easy for the heavy objects to crash due to the large impact load of the water surface during the forced landing of the airdropped heavy objects. In order to improve the crash resistance of air-dropped heavy objects, based on any Lagrangian-Euler theory, a liquid-solid coupled finite element model for the analysis of the forced drop performance of air-dropped heavy objects was established, and numerical simulation and experimental verification were carried out. After the model is verified, the numerical results are very close to the experimental data, and the verified model is used to analyze and optimize the dynamic characteristic parameters of the forced drop of the surface of the airdropped heavy object by using the orthogonal test design method, and the better parameter matching is obtained to improve Anti-crash performance.

Airdrop heavy objectin in the water surface forced landing process because of the surface impact load is large, it is easy to cause heavy weight to crash. In order to improve the anti-crash resistance of airdrop heavy objects, according to arbitrary Lagrangian-Ola theory, a liquid-solid coupling finitucom model for the performance analysis of air-dropped heavy objects is established, and numerical simulation and experimental verification are carried out. After the model has been verified, its numerical results are very close to the experimental data, and the parameters of dynamic characteristics of the jet-drop surface forced landing are analyzed and optimized by using the validated model to improve the dynamic characteristics of the surface landing of heavy objects, and better parameter matching can be obtained to improve the anti-crash performance.

In the process of forced landing of heavy objects on the water surface, the heavy objects are easy to crash because of the large impact load on the water surface. In order to improve the crashworthiness of air dropped heavy objects, a liquid-solid coupling finite element model for the performance analysis of forced landing of air dropped heavy objects on water surface is established based on the arbitrary Lagrange Euler theory, and the numerical simulation and experimental verification are carried out. After the model is verified, the numerical results are very close to the experimental data, and using the method of orthogonal experimental design to analyze and optimize the dynamic parameters of the surface landing of air dropped heavy objects, from which better parameter matching can be obtained to improve the crashworthiness.