티스토리 뷰
MODOPT
MODOPT, Method, NMODE, FREQB, FREQE, Cpxmod, Nrmkey, ModType, BlockSize, --, --, --, FREQMOD
Specifies modal analysis options. = 고유진동수 구하기
damped = 감쇠 = 마찰고려
undamped = 비감쇠 = 마찰 고려 x
Method
- Mode-extraction method to be used for the modal analysis.
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LANB |
Block Lanczos |
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LANPCG |
PCG Lanczos |
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SNODE |
Supernode modal solver |
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SUBSP |
Subspace algorithm |
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UNSYM |
Unsymmetric matrix |
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DAMP |
Damped system |
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QRDAMP |
Damped system using QR algorithm |
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VT |
Variational Technology |
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1. Block Lanczos
- 100차까지밖에 실행 안됨
2. PCG Lanczos
- 100차까지밖에 실행 안됨
3. Supernode modal solver
- When Method = SNODE, NMODE should be greater than 100 for 2-D plane or 3-D shell/beam models and greater than 250 for 3-D solid elements to be computationally efficient.
4.Subspace algorithm
5.Unsymmetric matrix
6. Damped system
7. Damped system using QR algorithm
8. Variational Technology
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