Experimental research and theoretical analysis on a new type of metal spring isolation bearing

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Journal of Vibration and Shock ›› 2025, Vol. 44 ›› Issue (6) : 231-243.

EARTHQUAKE SCIENCE AND STRUCTURE SEISMIC RESILIENCE

Experimental research and theoretical analysis on a new type of metal spring isolation bearing

LIANG Yuming1， 2， BAI Yu*1， 2， MA Ming3

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Abstract

In order to solve the issue of zero horizontal stiffness in the sliding process of rigid skateboard bearings, a new type of metal spring isolation bearings was developed. Through pure shear tests of the metal spring components and compression-shear tests of the isolation bearings, the relationship between the restoring force characteristics of the component part and the isolation bearing was studied. The study results indicate that the vertical bearing capacity of the isolation bearing is independent of the horizontal restoring force; the metal spring component has nonlinear elastic restoring force, with the restoring force increasing with displacement. The frictional force of the isolation bearing is related to the vertical pressure, and the energy dissipation effect increases with increasing vertical pressure. A method for calculating the large deformation of curved Euler-Bernoulli beams under boundary constraints was proposed. Using this method and basing on the spring material and dimensions, the force-displacement relationship of the isolation bearing was observed. The computed results with the proposed method agree well with the test data and the simulation results. The proposed method demonstrating reliable calculation accuracy and high computational efficiency.

Key words

spring isolation bearing / horizontal stiffness / elastic deformation / statistical analysis / numerical model

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LIANG Yuming1, 2, BAI Yu1, 2, MA Ming3. Experimental research and theoretical analysis on a new type of metal spring isolation bearing[J]. Journal of Vibration and Shock, 2025, 44(6): 231-243

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