Читать книгу Flow-Induced Vibration Handbook for Nuclear and Process Equipment - Группа авторов - Страница 32

As discussed in Pettigrew et al (1986), the dominant damping mechanism in heat exchangers with gas on the shell‐side is friction between tubes and tube supports. The available information on damping of heat exchanger tubes in gases has been reviewed. This work yielded the following design recommendation for estimating the friction damping ratio, ζ_F, in percent:

(2‐13)

which takes into account the effect of support thickness, L, span length, ℓ_m, and number of spans, N.