建立考虑关键件的斜支承系统模型,基于系统跌落冲击动力学方程,利用4 阶Runge-Kutta 法,以系统参数、跌落冲击初始速度、支承角或频率比或系统阻尼比作为三个基本参量,获得关键件跌落破损边界,探讨支承角、频率比、系统阻尼比等对关键件跌落破损边界的影响规律.评价结果显示:较小的支承角或较大的频率比有利于扩大系统关键件的未损坏区;系统阻尼比存在最优值,恰当地选择阻尼比可改善斜支承系统的抗跌落冲击性;为使斜支承系统获得理想的减振和抗跌落冲击性能,需综合考虑内装物主体等效刚度系数、弹簧原长等参数.%Dimensionless dropping shock dynamic equations of tilted support spring system with critical components are established and solved by adopting 4th order Runge-Kutta method. The system parameter, initial velocity of the dropping shock and the angle of support, the frequency ratio or the damping ratio are regarded as basic parameters and the dropping damage boundary of the critical components is obtained. The influences of the support angle, frequency ratio and damping ratio of the system on the dropping damage boundary of the critical components are analyzed. Results of evaluation demonstrate that decreasing the angle or increasing the frequency ratio are beneficial for expending the safe zone of the critical components; the optimal damping ratio of the system exists, and reasonably choosing the damping ratio can improve the anti-shock property of the tilted support spring system; in order to obtain ideal vibration reduction and dropping shock resistance characteristics for the tilted support spring system, effects of the stiffness coefficient of the products, the original length of the spring and relevant parameters need to be considered comprehensively.
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