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Study on the coupling calculation method for the launch dynamics of a self-propelled artillery multibody system considering engraving process

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Defence Technology（防务技术） 2024年第9期39卷 67-85页

作者： Shujun Zhang Xiaoting Rui Hailong Yu Xiaoli Dong Institute of launch dynamics Nanjing University of Science and TechnologyNanjing 210094China National Key Laboratory of Complex Multibody System dynamics Nanjing 210094China

The launch dynamics theory for multibody systems emerges as an innovative and efficacious approach for the study of launch dynamics,capable of addressing the challenges of complex modeling,diminished computational efficiency,and imprecise analyses of system dynamic responses found in the dynamics research of intricate multi-rigid-flexible body systems,such as self-propelled *** advancement aims to enhance the firing accuracy and launch safety of self-propelled *** the shortfall of overlooking the band engraving process in existing theories,this study introduces a novel coupling calculation methodology for the launch dynamics of a self-propelled artillery multibody *** method leverages the ABAQUS subroutine interface VUAMP to compute the dynamic response of the projectile and barrel during the launch process of large-caliber self-propelled ***,it examines the changes in projectile resistance and band deformation in relation to projectile motion throughout the band engraving *** analysis of the computational outcomes with experimental data evidences that the proposed method offers a more precise depiction of the launch process of self-propelled artillery,thereby enhancing the accuracy of launch dynamics calculations for self-propelled artillery.

关键词： Self-propelled artillery Engraving process Multibody system dynamics launch dynamics

Study on launch dynamics of the Tank Marching Fire

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Journal of Shanghai Jiaotong university(Science) 2016年第4期21卷 443-449页

作者：刘飞飞芮筱亭于海龙张建书周秦渤朱炜 Institute of launch dynamics Nanjing University of Science & Technology

As an army main battle equipment, it is required that the tank should have high firing accuracy and high first round hit probability during marching. The initial disturbance of the projectile is the premier factor that takes effect on the marching fire accuracy of the tank. And the marching fire accuracy of the tank depends on the launch dynamics behaviors of the tank. In this paper, the launch dynamics theory of a tank marching fire is studied, and its launch dynamics model is established. Based on the transfer matrix method for multibody system(MSTMM) and the automatic deduction theorem of overall transfer equations, the overall transfer equation and the overall transfer matrix of a tank multibody system are deduced; the launch dynamics equations of the tank marching fire are deduced, and the dynamic response of the tank system, the motion of projectile in barrel, the initial disturbance of the projectile and the vertical target dispersion are exactly simulated; meanwhile, the results of simulation are verified by tests. This work provides both theoretical foundation and simulation approaches for improving the marching fire accuracy of the tank.

关键词： marching fire launch dynamics firing accuracy initial disturbance

Simulation analysis of launch dynamics for high fire rate gun based on rigid-flexible coupling

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Simulation analysis of launch dynamics for high fire rate gu...

Novel sensitivity analysis method and dynamics optimization for multiple launch rocket systems

第四届国际自动化测试与仪器仪表学术会议

作者： Guo Ying Su Zhongting Han Xiaoping Xue Jing Academy of Armored Force Engineering

A rigid-flexible coupling simulation model of high fire rate gun was built up based on multi-body dynamic and finite element method in order to study the effecting law of muzzle disturbance when the projectile comes out from the muzzle and the rule of muzzle disturbance because of the fire *** mode analysis of the high fire rate gun was carried and the natural frequency and mode shape of the first six vibration mode were obtained using ANSYS finite element analysis software considered the flexible *** control function of pressure of every tube was designed aiming at the particularity of fire *** height and orientation vibration characteristic under different fire rate was received by *** simulation result could afford the theory guidance and technique sustain of the improvement of high fire rate gun fire density.

关键词： high fire rate gun ANSYS ADAMS rigid-flexible coupling launch dynamics

来源： cnki会议评论

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Journal of Southeast University(English Edition) 2022年第1期38卷 15-19页

作者： Tu Tianxiong Wang Guoping Rui Xiaoting Miao Yunfei Institute of launch dynamics Nanjing University of Science and TechnologyNanjing 210094China

This study establishes the launch dynamics method,sensitivity analysis method,and multiobjective dynamic optimization method for the dynamic simulation analysis of the multiple launch rocket system(MLRS)based on the Riccati transfer matrix method for multibody systems(RMSTMM),direct differentiation method(DDM),and genetic algorithm(GA),*** show that simulation results of the dynamic response agree well with test *** sensitivity analysis method is highly programming,the matrix order is low,and the calculation time is much shorter than that of the Lagrange *** the increase of system complexity,the advantage of a high computing speed becomes more *** parameters that have the greatest influence on the dynamic response include the connection stiffness between the pitching body and the rotating body,the connection stiffness between the rotating body and the vehicle body,and the connection stiffnesses among 14^(#),16^(#),and 17^(#)wheels and the ground,which are the optimization design *** optimization,angular velocity variances of the pitching body in the revolving and pitching directions are reduced by 97.84%and 95.22%,respectively.

关键词： Riccati transfer matrix method for multibody systems multiple launch rocket system launch dynamics sensitivity analysis optimization design