A MODAL INTERACTION INDICATOR FOR QUALIFYING Cs AS AN INDICATOR OF STRENGTH OF COUPLING BETWEEN SEA SUBSYSTEMS
✍ Scribed by P.P. JAMES; F.J. FAHY
- Book ID
- 102975265
- Publisher
- Elsevier Science
- Year
- 2000
- Tongue
- English
- Weight
- 1004 KB
- Volume
- 235
- Category
- Article
- ISSN
- 0022-460X
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✦ Synopsis
In two previous papers [1,2], a technique for the indication of strength of coupling between SEA subsystems was proposed. However, an apparent limitation to the use of the coupling strength indicator C 1 was revealed by computational simulation. Whereas a value for C 1 greater than 0)07 clearly indicates weak coupling, a smaller value only con"rms strong coupling between subsystems when the uncoupled resonance frequencies of each subsystem are su$ciently proximate. In order to overcome this major di$culty in the interpretation of small values for C 1 , an indicator of modal interaction M N is proposed. In the case of weak coupling, modal interaction is directly related to the proximity between uncoupled resonance frequencies. The de"nition of M N relies upon both a deterministic analysis of the coupling between two oscillators and a statistical model of interaction between uncoupled resonant modes. M N can be assessed on assembled structures and improves the reliability of C 1 as an indicator of strength of coupling between SEA subsystems.