【作者】 晏育雄； 孙智；

【Author】 ~*Yan Yu-xiong,Sun Zhi (State Key Laboratory for Disaster Reduction in Civil Engineering,Tongji University,Shanghai 200092)

【机构】 同济大学土木工程防灾国家重点实验室；

【摘要】 本文给出了基于梁式格栅桁架连续化模拟的结构有限元静力分析方法,通过将含格栅式桁片的空间桁架结构连续化比拟成空间箱梁单元,由两者应变能相等条件得到等代梁元的本构关系,进而求得等代梁的单元刚度矩阵。文中以-含双撑单联桁片的空间桁架为对象,程序实现了这一算法并进行了相应的数值仿真研究。与空间桁架离散杆元模型相比,数值分析的结果显示基于等效连续化模拟的等代梁元模拟方法具有很高的精度。更多还原

【Abstract】 A structural finite element analysis method based on continuum modeling of beam-like lattice trusses is presented.In this method,a segment of the spatial lattice trusses is continuously modeled as a spatial box beam element.Constitutive relationship of the equivalent beam element is obtained based on the strain energy equilibrium of the continuum beam element and the truss segment under given deformation patterns.Furthermore,the stiffness matrix of the beam element can be derived.As a demo,the continuum modeling of a double-lace single-bay spatial truss structure is programmed and a numerical study is conducted.The numerical simulation shows that the result of the equivalent continuum simulation method is of high accuracy.更多还原