Abstract: Usually, the stiffness of the conventional isolator is small because the performance of vibration isolation is preferential to that of shock isolation. This leads to high efficiency of shock isolation but large relative displacement. Moreover, the stiffness break is induced by the displacement restrictor, and the efficiency of shock isolation is deteriorated. Based on the law of conservation of energy, the conventional shock isolator and the Ruzicka isolator is modeled and analyzed, and the cushioning coefficients are obtained. Comparison shows that the Ruzicka isolator has more excellent performance than that of the conventional isolator. The shock isolation system with the Ruzicka isolator is changed to the dimensionless form with an acceleration pulse input of half sine shape. The shock response is calculated, and the parameters with high efficiency of shock isolation are obtained. The shock response shows that the maximal acceleration and relative displacement are restricted below the limit value by the Ruzicka isolator when the conventional design fails to protect the object.

Key words: vibration and wave, Ruzicka isolation, shock isolation, shock response, cushioning coefficient

摘要： 传统的隔振器是在保证隔振效果的前提下再考虑抗冲击问题，所以一般刚度较小，冲击隔离率虽高，却容易造成较大的相对位移，而在附加限位器后，由于刚度突变，又容易引起二次冲击。建立Ruzicka抗冲系统模型，在能量守恒定律的前提下，得到传统的及Ruzicka抗冲系统的缓冲系数。结果表明，在某些参数域内，Ruzicka隔振器具有更优的抗冲性能。文中对Ruzicka抗冲系统进行无量钢化，以基础加速度半正弦波作为冲击输入，计算系统在不同参数条件下的冲击响应，得到具有较高抗冲击性能的参数域。冲击响应的计算也表明了在传统抗冲系统严重失效的情况下，Ruzicka隔振器仍然将被隔离设备的最大加速度和相对位移限制在允许的范围内。

关键词: 振动与波, Ruzicka隔振器, 冲击隔离, 冲击响应, 缓冲系数