ABAQUS常见错误——个人经验总结（持续更新2024.10.18）

Normal cannot be computed in 1 elements. The nodal coordinates may be incorrect or the element aspect ratio may exceed 1000 to 1. The elements have been identified in element set ErrElemNormal

A temporary directory for the RSG plug-in could not be created; therefore, it was not registered

解决方法：

频率计算错误

The eigenvalues cannot be found. This could be caused due to instabilities in the base state

错误原因：约束不够

解决方法：增加约束（找出模型中约束不足的地方，尤其是耦合的位置）

提取频率错误：THE LANCZOS SOLVER HAS FAILED TO FIND ALL THE EIGENVALUES

解决办法：在如下关键词中

*Frequency, eigensolver=Lanczos, acoustic coupling=on, normalization=displacement, number interval=1, bias=1.

10, , , , ,

删除“, number interval=1, bias=1.”语句即可

先一般分析后屈曲分析：MASS OR DIFFERENTIAL STIFFNESS MATRIX IS COMPLETELY NULL. THE EIGENPROBLEM CANNOT BE SOLVED.

错误信息：MASS OR DIFFERENTIAL STIFFNESS MATRIX IS COMPLETELY NULL. THE EIGENPROBLEM CANNOT BE SOLVED. IN A *BUCKLE ANALYSIS THE MOST LIKELY CAUSE IS THAT A NONZERO LOADING PATTERN WAS NOT SPECIFIED VIA *BOUNDARY, *CLOAD, *DLOAD, ETC,. SEE Eigenvalue Buckling Prediction IN THE ABAQUS/STANDARD USERS MANUAL（翻译：质量或差分刚度矩阵完全为空。特征问题无法求解。在*屈曲分析中，最可能的原因是没有通过*boundary、*cload、*dload 等指定非零加载模式。参见 ABAQUS/STANDARD 用户手册中的特征值屈曲预测）

解决办法：将图中的step-2的“静力通用”改成“屈曲分析”