Design,preparation and vibration damping performance of novel tubular reinforced superelastic porous structure
Traditional rubber damping materials have better damping capacity,but their mechanical bearing capacity is insufficient.To solve the above problems,based on the bionic gradient design idea,combined with the excellent mechanical properties of lightweight porous structure and the high damping superelastic properties of polyurethane materials,a new tu-bular reinforced superelastic gradient porous structure with excellent mechanical load bearing properties and vibration damp-ing properties is designed,an integrated molding process of molding and perfusion is developed.The preparation of different sizes of superelastic gradient porous structure shock absorbers is realized.Through modal analysis and frequency response experiment,the natural vibration and vibration damping properties of the structure were obtained,and the effects of different hardness polyurethane materials and different topological configuration reinforced tubes on the vibration damping properties of the structure were revealed.The results show that compared with other structures,the circular reinforced structures have higher fundamental frequency and lower resonance peak value in low frequency band,which shows excellent performance of high stiffness and high damping.In the high frequency band,the triangular reinforced structure has lower overall response and better vibration damping performance.
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