形状系数对三元乙丙橡胶板式支座竖向压缩性能的影响

Effect of Shape Factor on Vertical Compression Properties of EPDM Laminated Bearings

采用有限元分析方法,研究几何构型参数对三元乙丙橡胶(EPDM)板式支座竖向压缩性能的影响。结果表明:当形状系数(S)分别为7,7.5,8.17时,EPDM板式支座的压缩弹性模量计算值与理论值的误差大于规范限值(20%);当S>8.17时,该误差小于规范限值;随着S增大,该误差总体减小。在最大设计压缩应力(10 MPa)下,EPDM板式支座的竖向压缩位移均小于规范限值;随着S增大,竖向压缩位移与其限值的比值逐渐减小。EPDM板式支座的竖向压缩性能良好,与传统天然橡胶和氯丁橡胶板式支座较一致,满足实际工程需求。

The influence of geometrical parameters on the vertical compression performance of the ethylene-propylene-diene rubber(EPDM)laminated bearing was studied by finite element analysis method.The results showed that when the shape factor(S)was 7,7.5,and 8.17,the error between the calculated value and the theoretical value of compressive elastic modulus of the EPDM laminated bearing was greater than the standard limit value(20%).When S>8.17,the error was less than the standard limit,and as S increased,the error decreased overall.Under the maximum design compressive stress(10 MPa),the vertical compressive displacement of the EPDM laminated bearing was less than the standard limit,and the ratio of the vertical compression displacement to its limit value gradually decreased with the increase of S.The vertical compression performance of the EPDM laminated bearing was good,which was consistent with that of traditional natural rubber and chloroprene rubber laminated bearings,and could meet actual engineering requirements.