Two stage shock absorber system is the main structural forms of shock absorption for the under-water launched missile damping system in the world, the influence of structural parameters on the damping performance is very im-portant to engineering design and research analysis. Based on the three story beam-spring model, the influence of structural deformation, structural quality and stiffness of the damping link on the shock response of the two-stage damping system is analyzed. The results show that the two stage shock-absorbing structure can get effective anti-shock performance; with the increase of the stiffness ratio of the lower dampers relative to the upper dampers, the maximum overload response of the up-per beam of the simulated missile decreases, while the maximum relative distance between the simulated inner and outer cyl-inder increases; with the increase of the mass ratio of the middle beam to the other two layers, the influence of the medium beam quality on the system response is reduced.%双级减震系统是国内外潜射装置抗冲减震的主要结构形式,明确结构参数对减震性能的影响规律,对工程设计和研究分析具有重要作用.采用3层梁-弹簧模型,从梁结构质量比、双级减震环节刚度比以及梁变形等角度出发,对减震系统中结构变形、结构质量以及减震环节刚度等因素对双级减震系统冲击响应的影响规律进行研究分析.研究结果表明:采用双级减震结构,能够获得有效的抗冲击性能;随着下层相对上层减震环节刚度比的增加,模拟弹体的上层梁最大过载响应减小,而模拟内外筒的中间层与下层梁间最大相对距离增加;随着中层梁相对其他2层的质量比增加,中层梁质量对系统响应的影响减小.
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