A study on liquid shock of energy-absorbing anti-impact hydraulic column

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Journal of Vibration and Shock ›› 2020, Vol. 39 ›› Issue (8) : 51-57.

ZHANG Jianzhuo，ZHANG Jialin

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Abstract

According to the problem of liquid shock on hydraulic column with energy-absorbing component under impact load, the deformation behavior and characteristics of a diameter-expanding energy-absorbing component under different loads were analyzed, and the energy absorption model of energy-absorbing component based on the LuGre model was established.Then, based on the general equation of determining solution of liquid shock problem, theoretical and simulation analysis of liquid shock of roof weighting for the energy-absorbing component and hydraulic column system were carried out, and the effect of characteristics of energy-absorbing components on liquid shock of hydraulic column was obtained.The results show that the maximum static friction force and coulomb friction force correspond to the peak bearing capacity and the reaction force in stable deformation stage of the energy-absorbing component respectively.The bristle stiffness and micro-damping coefficient influence the force-displacement characteristic of energy-absorbing component when the elastic deformation transits to the plastic deformation.With deformation process of diameter-expanding energy-absorbing component, the influence of energy-absorbing component on liquid shock of hydraulic column can be divided into approximate elasticity, flexible giving way to absorpt energy and rigidity three stages.

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energy-absorbing component / LuGre friction model / energy-absorbing anti-impact hydraulic column / liquid shock

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ZHANG Jianzhuo，ZHANG Jialin. A study on liquid shock of energy-absorbing anti-impact hydraulic column[J]. Journal of Vibration and Shock, 2020, 39(8): 51-57

References

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