A singular matrix could also occur if mesh elements are of too low quality. If the minimum element quality is less than 0.005 you might be in trouble. Another reason for this error message is that you have different element orders for two variables that are coupled by, for example, a ...
出现错误“奇异矩阵”。 解决方法 如果系统矩阵(雅可比矩阵或刚度矩阵)是奇异矩阵,则求解器无法对其求逆。这通常意味着系统是欠定的。请检查是否完全指定了所有方程,以及边界条件是否合适。例如,在稳态模型中,通常需要在某个边界上设置狄利克雷条件(即,在边界上指定解的值)。
51、ror might appear if the stiffness matrix (jacobian matrix) is singular or almost singular。 for iterative solvers this error might appear, for instance, if the iterative process diverges。 press the details button to see which linear solver caused the error。90009999 general errorstable 2-6:...
See error 7144 regarding general memory-saving tips. 7111 Singular matrix The system matrix (Jacobian matrix or stiffness matrix) is singular, so the solver cannot invert it. Usually this means that the system is underdetermined. Check that all equations are fully specified and that the boundary ...
Error in input parameters。 2141 Singular revolutions not supported The revolved mesh has a singularity at the z axis. If possible, create the cylinder using a 3D primitive or by revolving the geometry before meshing。 2146 Subdomain must bounded at least four boundary segments Incorrect geometry...
Fixes a potential out-of-memory error that may occur when saving a model containing, in terms of disk space usage, large computed data to a Model Manager server database.2 For modal reduced-order models, the damping-ratio matrix is now consistently updated to reflect the chosen modal damping...
You can then attempt to turn off the error control in the linear solver. To do this, go to the Direct node in the solver sequence. In the Error section, set Check error estimate to No. This will force the solver to return a solution unless the stiffness matrix is singular. When you ...
楼上正解，通过显示材质，选择不同的材料会显示出不同的颜色。
An easy way to emulate this in the above example is to set one of the permittivity values to zero and start the batch job. A zero permittivity means that we are feeding the solver with an ill-defined (even singular) equation (similar to 0 = 1) and you will get an error message indi...
想着.txt文件是MATLAB最方便的，但comsol导出几何结构文件的扩展名可选的有.mphbin .mphtxt .x_b .x_...