新型椭球网壳减震体系性能分析

本文利用非线性有限元理论,对附加屈曲约束支撑的单层组合椭球网壳的减震性能进行了初步研究.假设钢材为理想弹塑性模型,通过大型有限元分析软件ANSYS编程进行参数化建模和具体实例分析;模型中的结构杆件采用Beam188单元,而支撑部件用Link8单元代替.对结构进行三维El-centro波作用下的动力响应分析,结果表明,这种附加屈曲约束支撑的网壳结构的关键点位移响应明显减小.基于分析结果,本文提出此类网壳屈曲约束支撑的一种布置方法,并对具体的支撑布置形式进行了分析研究,得出相关结论.

Analysis of Vibration Reducing Performance on Innovation System of Ellipse Lattice Shell

Nonlinear finite element method is applied to analysis ellipse lattice shell,and preliminary study on vibration reducing performance of single-layer combined ellipse lattice shell with BRB(buckling restrained braces) is carried out.During the course of the analysis,material nonlinearity is considered,and the perfect elastic-plastic modal is adopted as the material modal of steel.Software ANSYS is used for analysis.Beam188 unit is selected as structure member in the modal and link8 unit is used to brace member based on the main performance of the buckling restrained brace.The result shows that the displacement response of key-points on the shell equipped with buckling restrained braces decreases notability,which works under the effect of 3-dimension Elcentro wave.A kind of BRB arrangement scheme is put forward in this paper,and some specific studies on different BRB's shell are carried out,subsequently,relative conclusions are derived in the end.