在使用通用有限元软件(如Abaqus,lsdyna,ansys)进行隐式分析计算(或静力分析,或动力学初始状态求解)时,对于复杂装配体模型,大家或多或少会遇到以下警告信息: “***WARING:THE SYSTEM MATRIX HAS *NEGTIVE EIGENVALUES.”即警告:系统矩阵出现了负特征值。往往产生这样的警告后,计算便很难收敛了。但也有例外,在接触...
1).刚体位移 2).单元异常,过度变形、过度扭曲等 3).应力应变关系有负斜率 4) 如果有流体的话,在容器发生形变的话,也可能出现negative eigenvalue 的情况,不过不会出现警告,这是被允许的 5) 失稳发生 可参考http://forum.simwe.com/viewthread.php?tid=842233&highlight=%BE%AF%B8%E6 2 The ratio of d...
2 RATIO = 4.81318E+15 ***WARNING: THE SYSTEM MATRIX HAS 2 NEGATIVE EIGENVALUES. EXPLANATIONS ARE SUGGESTED AFTER THE FIRST OCCURRENCE OF THIS MESSAGE. ***WARNING: Solver problem. Numerical singularity when processing D.O.F. 1 of 1 nodes. The nodes have been identified in node set warnnode...
system matrix 系数矩阵; 实用场景例句 全部 An equivalent simplification method was proposed for analyzing low - machine power systems. 这种等值简化方法可以有效降低系统矩阵的维数,并保留了原系统的全部特征值信息. 互联网 Q : WARNING : THE SYSTEM MATRIX HAS 1 NEGATIVE EIGENVALUES. ...
1 负特征值问题:THE SYSTEM MATRIX HAS 8 NEGATIVE EIGENVALUES.负特征值是非线性分析的必然产物。所以不必大惊小怪,甚至久而久之,对于你熟悉的问题,你都会视而不见了。若出了问题,可先检查下有没有伴随的numerical sigularity(数值奇异)和 Zero pivot(零主元)产生。如果没有,可以参考这几个方面: ...
the system matrix has 31 negative eigenvalues.怎么解决 我来答 1个回答 #热议# 公司那些设施可以提高员工幸福感?ji...2@163.com 2017-04-18 知道答主 回答量:4 采纳率:0% 帮助的人:2236 我也去答题访问个人页 展开全部 这就是英语 已赞过 已踩过< 你对这个回答的评价是? 评论 收起 ...
***WARNING: THE SYSTEM MATRIX HAS 1 NEGATIVE EIGENVALUES. NEGATIVE EIGENVALUES MEAN THAT THE SYSTEM MATRIX IS NOT POSITIVE DEFINITE: FOR EXAMPLE, A BIFURCATION (BUCKLING) LOAD MAY HAVE BEEN EXCEEDED. ***WARNING: SOLVER PROBLEM. NUMERICAL SINGULARITY WHEN PROCESSING NODE SPLINE-2-1.98 D....
Ansys分析计算时..Ansys分析计算时出现the system matrix is unsymmetric卡住了,怎么解决?有没有大神,求教快毕不了业了
void MatrixMult(int size, double** m1, double** m2, double** result) { int N = size; int P = 2 * NUMPROCS; int Chunk = N / P; HANDLE hEvent = CreateEvent(NULL, TRUE, FALSE, NULL); long counter = P; for (int c = 0; c < P; c++) { std::thread t ([&,c] { for...
Private Sub Button2_Click(ByVal sender As System.Object, _ ByVal e As System.EventArgs) Handles Button2.Click InputNeuron(0) = TextBox1.Text InputNeuron(1) = TextBox2.Text InputNeuron(2) = TextBox3.Text HiddenInput(n, m) HiddenTransfer(m) OutputInput(m) OutputTransfer() If oout ...