Comparative analysis of the dissipation energy capacity of the ring net by two different connection forms

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Journal of Vibration and Shock ›› 2012, Vol. 31 ›› Issue (2) : 55-61.

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Comparative analysis of the dissipation energy capacity of the ring net by two different connection forms

Wang Min1; Shi Shao-qing1; Yang You-kui2

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Abstract

Calculation method for equivalent radius of rings is deduced through static tests and theory analysis of single ROCCO ring. Calculation models for two different connection forms are put forward. Four ROCCO rings are connected to a single ROCCO ring in the first connection form (Model 1) and six ROCCO rings are connected to a single ROCCO ring in the second connection form (Model 2). Static and dynamic energy dissipation capacity of the two models has been studied through numerical analysis method. The results indicates that： ①the energy dissipation capacity of the single ROCCO ring in Model 2 is greater than that in Model 1 when ROCCO rings are the same in both models；②the deformation displacement in model 2 is shorter than that in model 1 under rockfall strike with the same kinetic energy when the two models are produced with the same material. The rockfall impacting load in model 2 is lower than that in model 1 at first, and it grows greater than that in model 1 with growing of radius of rockfall,；③ dissipation capacity limitation under rockfall impacting grows with growing of radius of rockfall. The dissipation capacity limitation in model 1 is greater than that in model 2, and the dissipation capacity limitation in model 2 grows greater than that in model 1 when radius of rockfall grows to some extent. So the second model can be adopted to reduce the costs when deformation displacement of defend system is taken into consideration and an economical and reasonable connection form can be chosen based on the characteristic of the rockfall when the energy dissipation capacity limitation of the system is taken into consideration.

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connection form / ring net dissipated energy / static tests / dynamic tests / FEM

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Wang Min; Shi Shao-qing; Yang You-kui. Comparative analysis of the dissipation energy capacity of the ring net by two different connection forms[J]. Journal of Vibration and Shock, 2012, 31(2): 55-61