Solver problem . zero pivot when processing d . o . f . 2 of 1 nodes . the nodes have been identified in node set warnnodesolvprobzeropiv _ 2 _ 1 _ 1 _ 1 _ 1 是不是刚度矩阵的问题?我的程序是照着一个讲座的材料上抄下来的,应该没什么问题的仿真分析,有限元,模拟哪位老兄能指点下!
So , it takes both advantages of spline finite strip method with less node displacement and that of plastic hinge method with convince of getting plastic elemental stiffness matrix 因此该方法兼具二者优点:样条有限条法的位移量少和塑性铰法形成塑性刚度矩阵的便利。
The large displacement stiffness matrix of the 4 - node space cable element is derived based on the updated total lagrangian formulation and fem theories 本文基于修正的拉格朗日坐标描述法,利用有限元的基本理论,推导了空间四节点索单元的大位移刚度矩阵的具体表达式。
In the respect of pseudo dynamic test , the author explained the influencing factors of initial inputting stiffness matrix and the equivalent method of mass matrix of model 在拟动力试验方面,指出了联机试验中初始刚度矩阵的影响因素,建立了模型质量矩阵的等效方法。
Based on the element of shell with a single layer , a new element with high order to solve the laminated shell structure and its stiff - matrix are constructed 在单层壳体单元的基础上,提出用于分析层合壳体结构的一种新的高阶单元8结点壳体曲面单元,并推导该单元的刚度矩阵。
By using 3 - d isoparametric element , the global stiffness matrix equation for the piezoelectric laminate is obtained on the bases of minimum principle of total potential energy 由于最小势能原理,建立了单元刚度矩阵和压电材料的整体刚度方程。并且推导了压电层合板的边界条件。
In previous researches , the attentions were mostly paid to the local negative stiffness caused by concrete crack , and in this case the global stiffness matrix was rarely negative 笔者在已有的研究成果基础上,对由混凝土结构鳖体刚度矩阵变负引起的求解困难提出了相应的解决方案。
The accuracy of the stiffness matrices is verified by many examples . in this paper , an fem program is developed for the portal frames with the tapered columns and beams 由此,推导出了可以用于门式刚架线弹性分析的变截面梁单元的刚度矩阵,并且通过多个例题的演算,验证了它的正确性。
( 2 ) to cut down great calculation of assembling and disassembling of stiffness matrix in the nonlinear procedure , the initial stress method is introduced to resolve the nonlinear equations ( 2 )使用初应力法对非线性方程组进行迭代计算,避免了组装和分解总体刚度矩阵的繁杂而庞大的运算。
In order to consider the geometrically nonlinear behavior of suspension bridge structure , the tangential stiffness matrix of the assembled element and that of the spatial bar element were formulated 根据等参单元的大变形理论,推导了组合单元的切线刚度矩阵,以适应悬索桥的几何非线性分析。