组合式双圆锥耗能器的设计与性能模拟分析

设计了组合式双圆锥耗能器，阐述了其构造和耗能原理，采用有限元软件对18个不同尺寸的双圆锥耗能元件和3个不同组装方式的双圆锥耗能器进行了数值仿真分析，研究了不同设计参数对双圆锥耗能器的滞回性能和应力分布的影响。研究结果表明：对于双圆锥耗能元件，当其总高H一定时，其初始刚度和屈服位移取决于两个锥体中较大锥体的高度大小；屈服位移可设置在1mm以内，耗能系数值可达2.5。双圆锥耗能元件通过不同的方式组合成双圆锥耗能器时，双圆锥耗能器的滞回性能取决于所选用的双圆锥耗能元件和其上、下连接板的刚度，当连接板刚度较大时，双圆锥耗能元件的滞回性能与其组装后的双圆锥耗能器的相关滞回性能满足叠加关系，双圆锥耗能器的相关滞回性能可由所选用的双圆锥耗能元件的相关参数(初始刚度、屈服位移和耗能系数等)来确定。

Design and FE Analysis for an assembled biconical energy dissipator(BED)

A new type of assembled biconical energy dissipator(BED),was designed.18 pieces of BEDCs(biconical energy dissipated cells) and 3 patterns of BED were numerically simulated and analyzed with FE software.The characteristics of BEDs including hysteresis performances,stress distribution forms and practical assemblies were obtained.The study results showed that if the height of a BEDC is determined,its initial stiffness and yielding displacement are dependent on the height of the bigger cone;the yielding displacement can be set within 1mm;the energy dissipation index can reach 2.6;the hysteresis performances of different patterns of the assembled BEDs depend on the adopted BEDCs and the stiffnesses of the top and the bottom connecting plates;when the connecting plates have enough stiffness,the relative hysteresis performance parameters of the BED can be gained with superposition of the relevant parameters of the adopted BEDCs,such as,initial stiffness,yielding displacement and coefficient of energy dissipation.