Читать книгу Flow-Induced Vibration Handbook for Nuclear and Process Equipment - Группа авторов - Страница 60

The analysis should show that acoustic resonance conditions are avoided in the heat exchanger tube bundle. This should be based on at least two generally recognized criteria (e.g., Blevins and Bressler, 1987 and Ziada et al, 1989). The heat exchanger relevant parameter, whether it be shedding frequency, f_s, acoustic frequency, f_an, geometry, P/D, L/D or resonance parameter, G_s, or G_i, should be at least 25% away from the resonance criteria or boundary, thus:

(2‐57)