Design and Characteristics of a Passive Constant Force Shock Absorber

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Journal of Vibration and Shock ›› 2015, Vol. 34 ›› Issue (13) : 176-181.

ZHANG Chun-hui1, WANG Yu2, DU Jian-ye2, WEN Zhao-dong2

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Abstract

It is well known that the acceleration amplitude and the relative displacement amplitude of ships equipment acceptable are very small when they are subjected to a strong impact. Under this circumstance, none of the vibration isolator and the displacement restrictor could meet the shock isolation requirements of ship equipments. Therefore, a special shock absorber is necessary which could store and dissipate larger shock energy. Based on the optimal shock isolation theory, a passive constant force shock absorber is developed. The relation between stress of cam sliding rail and spring deformation is obtained. Furthermore, the numerical analysis related to the effects of rubber stiffness and damping ratio on shock isolation performance of the absorber is carried out. The results prove that in comparison with the equivalent linearity shock isolation system, the constant force shock absorber can obviously reduce the absolute acceleration amplitude and the relative displacement amplitude and effectively improve the impact resistance performance. The conclusions provide certain value for reference to the design and application of the constant force shock absorber.
Key words: constant force device; impact resistance performance; damping ratio

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ZHANG Chun-hui1, WANG Yu2, DU Jian-ye2, WEN Zhao-dong2. Design and Characteristics of a Passive Constant Force Shock Absorber[J]. Journal of Vibration and Shock, 2015, 34(13): 176-181

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