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基于能量方法评价隔震系统的隔震效率,建立了人体与隔震结构的二自由度隔震系统力学模型,通过分析隔震系统在爆炸冲击震动输入下的能量响应,参考传统的加速度传递率评价方法,提出了从人体承受冲击能量大小的角度评价爆炸冲击隔震系统隔震效率的方法,即能量传递率法。通过输入不同峰值和脉冲宽度的半正弦加速度脉冲信号,数值模拟了二自由度隔震系统在不同爆炸冲击震动输入工况下的能量响应,以及隔震系统的加速度传递率和能量传递率。通过对计算结果的分析,研究了隔震系统的输入与输出之间的关系,以及输入能量对隔震效率的影响规律。研究结果表明:与传统的加速度传递率相比,能量分析方法能够较好地反映爆炸冲击隔震系统的隔离效果。
Based on the energy method to evaluate the isolation efficiency of the isolation system, a two-freedom vibration isolation system model with human body and isolation structure is established. By analyzing the energy response of the isolation system under the shock and vibration input, the traditional acceleration transfer rate Evaluation method, a method of evaluating the isolation efficiency of shock-absorbing system with shock from the perspective of human body’s impact energy is put forward, that is, the energy transfer rate method. By inputting half-sine acceleration pulse signals with different peak and pulse widths, the energy response of two-degree-of-freedom isolation system under different shock and shock loading conditions and the acceleration and energy transfer rates of the isolated system are numerically simulated. Through the analysis of the calculation results, the relationship between the input and the output of the isolation system and the influence law of the input energy on the isolation efficiency are studied. The results show that compared with the traditional acceleration transfer rate, the energy analysis method can better reflect the isolation effect of the shock isolation system.