辽宁工程技术大学学报（自然科学版）2025，Vol.44Issue(1)：25-34,10.
负刚度NES减震器抗震性能有限元分析
Finite element analysis of seismic performance of negative stiffness NES shock absorbers
摘要
Abstract
In order to broaden the frequency variation range of nonlinear energy sink(NES),based on the principle of negative stiffness,a negative stiffness system is constructed by pre-compression springs,and a horizontal negative stiffness NES shock absorber is designed.Numerical simulation of negative stiffness NES shock absorber using ABAQUS finite element software to analyze the effects of length-width ratio of spring stroke,pre-compression,stiffness and damping ratio on the seismic performance of negative stiffness NES shock absorber in the state of no friction on the guide rod and no lateral buckling of the spring.The results show that increasing the pre-compression of the spring can improve the seismic performance of the shock absorber under the condition of fixed length-width ratio of spring stroke;under the condition of fixed spring pre-compression,as the length-width ratio of spring stroke increases,the bearing capacity of the shock absorber gradually decreases,and the seismic performance decreases.The increase in spring rate and damping ratio can significantly increase the bearing capacity of the shock absorber and improve the seismic performance.The research results provide a reference for the engineering application of negative stiffness NES.关键词
被动控制系统/NES减震器/负刚度/滞回曲线/抗震性能Key words
passive control systems/NES shock absorbers/negative stiffness/hysteresis curves/seismic performance分类
土木建筑引用本文复制引用
庞森,姜子航,刘可宁,吴圆圆..负刚度NES减震器抗震性能有限元分析[J].辽宁工程技术大学学报（自然科学版）,2025,44(1):25-34,10.基金项目
国家级大学生创新训练项目(202310225037) （202310225037）
中建集团研发青年项目(CSCEC-2022-Q-43) （CSCEC-2022-Q-43）
