The analysis of impact forces in randomly vibrating elastic systems

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• 作者：R.S. Langley ; ^{RSL21@eng.cam.ac.uk}
• 刊名：Journal of Sound and Vibration
• 出版年：2012
• 出版时间：30 July, 2012
• 年：2012
• 卷：331
• 期：16
• 页码：3738-3750
• 全文大小：480 K

文摘

This work is concerned with the characteristics of the impact force produced when two randomly vibrating elastic bodies collide with each other, or when a single randomly vibrating elastic body collides with a stop. The impact condition includes a non-linear spring, which may represent, for example, a Hertzian contact, and in the case of a single body, closed form approximate expressions are derived for the duration and magnitude of the impact force and for the maximum deceleration at the impact point. For the case of two impacting bodies, a set of algebraic equations are derived which can be solved numerically to yield the quantities of interest. The approach is applied to a beam impacting a stop, a plate impacting a stop, and to two impacting beams, and in each case a comparison is made with detailed numerical simulations. Aspects of the statistics of impact velocity are also considered, including the probability that the impact velocity will exceed a specified value within a certain time.