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标题: 求解三角形管桁架SAP2000模型问题 [打印本页]

作者: sifone    时间: 2013-4-21 19:50     标题: 求解三角形管桁架SAP2000模型问题

请各位帮我看看这个模型运行出现负的周期是什么原因,如何解决,谢谢!
* * * W A R N I N G * * *
ZERO OR NEGATIVE MODAL-MASS VALUES WERE DETECTED DURING ITERATION,
THE RESULTING EIGEN-MODES MAY NOT BE VALID - CHECK THEM CAREFULLY !!

THE STRUCTURE IS UNSTABLE OR ILL-CONDITIONED !!
CHECK THE STRUCTURE CAREFULLY FOR:
- INADEQUATE SUPPORT CONDITIONS, OR
- ONE OR MORE INTERNAL MECHANISMS, OR
- ZERO OR NEGATIVE STIFFNESS PROPERTIES, OR
- EXTREMELY LARGE STIFFNESS PROPERTIES, OR
- BUCKLING DUE TO P-DELTA OR GEOMETRIC NONLINEARITY, OR
- A FREQUENCY SHIFT (IF ANY) ONTO A NATURAL FREQUENCY

NUMBER OF EIGEN MODES FOUND               =           3
NUMBER OF ITERATIONS PERFORMED            =           7
NUMBER OF STIFFNESS SHIFTS                =           0

附件: [管桁架模型] GHJ2_V9_V11.rar (2013-4-21 19:50, 22.11 K) / 下载次数 76
http://bbs.okok.org/attachment.php?aid=144532
作者: 橘子天空    时间: 2013-4-27 16:49

没有啊,我这边运行是正常的。好像周期是0.38
作者: zhuyulin10    时间: 2013-8-8 13:23

没问题,我用sap2000 14打开的。还进行了杆件设计选型。




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