Dynamic Characteristic Simulation and Optimization of Ground Test System for Airborne Launch Rack

doi:10.16182/j.issn1004731x.joss.24-0730

Abstract

Abstract:

To solve the ground equivalent test problem of the airborne launch system, an optimization method for the dynamic characteristics of the ground launch rack test system based on a multi-variable optimization approach was proposed. Through the discussion on the boundary conditions of the foundation, an effective dynamic simulation model of the ground launch test system was established. By comparing the dynamic characteristics of the launch rack structure in the airborne state and the ground test state, the objectives and constraints of the optimization design were determined. The dynamic characteristics of the ground test system were optimized and designed. The results show that this method can effectively optimize the dynamic characteristics of the launch unit in the ground launch test system to be close to those in the airborne state and reduce the peak dynamic response of the test system during launch impact. This method can be effectively extended to the dynamic characteristic optimization design of various ground launch test systems and enhance the effectiveness of ground test verification for airborne weapons.

Key words: airborne launch rack, ground launch test system, dynamic characteristic simulation, dynamic optimization

CLC Number:

TJ301

Bai Yuguang, Zhang Sheng, Cao Yushun, Zhang Xiaoshi, Huang Hu. Dynamic Characteristic Simulation and Optimization of Ground Test System for Airborne Launch Rack[J]. Journal of System Simulation, 2025, 37(12): 3151-3160.

Figures/Tables 18

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材料	杨氏模量/GPa	泊松比	密度/(kg·m^-3)
铝	70	0.30	2 800
钢	210	0.33	7 800

阶数	完全固支	K_W=105 920	K_W=45 000	试验值
1	8.71	8.59	8.45	8.43
2	9.86	9.79	9.70	9.66
3	10.53	10.36	10.20	10.17

阶数	优化前/Hz	优化后/Hz	机载状态/Hz	优化后误差/%
1	8.45	9.96	9.32	6.4
2	9.70	11.85	12.35	4.2
3	10.20	16.02	16.62	3.7

结构参数	优化前	优化后
前挂载结构宽度	20.00	76.16
前挂载结构高度	20.00	30.58
前挂载结构厚度	5.00	6.38
前挂载结构厚度	5.00	3.70
后挂载结构宽度	30.00	30.04
后挂载结构高度	30.00	88.34
后挂载结构厚度	6.00	4.39
后挂载结构厚度	6.00	3.79
上连接板厚度	30.00	35.43
下连接板厚度	30.00	16.92