FAQ 000769 ZH

计算 RFEM RSTAB

What does the following setting in the "Calculation Parameters" dialog box mean? "Failing members to be removed individually during successive iterations"

回答

In the first iteration step, all members are considered.

Before the next step, the program determines which members cannot resist the determined compressive forces (for example tension members) due to their definition. Now, the tension member with the greatest compressive force is removed from the stiffness matrix. The next iteration step follows.

Then, the member definitions are compared to the determined axial forces. For the next iteration step, the tension member subjected to the highest actions is removed from the stiffness matrix.

This procedure is continued until no member is subject to the internal forces that it cannot resist.
In this way, you can often achieve a better convergence behavior for the system because of redistributing effects.

This calculation option requires more time because the program must run through a larger number of iterations. Furthermore, you have to make sure that a sufficient number of possible iterations is set in the "Settings" dialog box section above.

For this method, it might also happen that the initially failed member is reinserted, because it is subjected to tension forces due to possible redistribution effects.

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RFEM 主程序 RFEM
RFEM 5.xx

主程序

结构设计与有限元­分析软件(FEA)可以用于建立平面与空间结构模型,适用于由杆件、面、板、墙、折板、膜、壳、实体以及接触单元等的建模与分析计算。

RSTAB 主程序
RSTAB 8.xx

主程序

空间结构设计与分析软件,主要用于框架、梁与桁架等空间结构的建模与计算。可以输出内力、变形与制作反力的线性与非线性的计算结果。