Rigid Mode Correction and Program Development for Spectrum Analysis
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摘要: 根据核级设备的抗震分析要求,当设备的振动频率低于反应谱刚性截断频率,刚性截断频率前的各阶模态的总参与质量未达到设备实际物理质量的90%时,应进行刚性模态修正。本文研究了刚性模态修正的理论与计算公式,采用APDL和UIDL语言对ANSYS10.0进行了二次开发,编制了适用的刚性模态修正程序,并进行了算例验证。算例验证结果证明了程序的正确性。Abstract: If the sum of equivalent masses of natural Frequencies below the cut-off frequency is lower than 90 % of the total mass,the rigid mode response needs to be taken into account.This paper studies the rigid mode correction theory.The second develop program to ANSYS10.0 is created by APDL and UIDL following this theory.The results from the verification example show the correction of the program.
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Key words:
- Spectrum analysis /
- Rigid mode correction /
- APDL /
- UIDL
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