Vibrational Power Flow Analysis of a Cylindrical Shell Using Four-Point Technique

H. Salimi-Mofrad, S.  Ziaei-Rad, M. Moradi

International Journal of Acoustics and Vibration, Vol. 19, No. 2, 2014 (pp. 127-130)

ABSTRACT

The aim of studying and analysing vibrational characteristics of structures using power flow is to control the noise and vibration within the structure and prevent it from being transmitted into the environment. The power flow within a cylindrical shell is investigated because of its importance in designing spacecraft and marine structures. In this paper, a four-point power flow technique was used to examine the effects of flexural and shear forces on the total power flow in a cylindrical shell in free-free conditions. To obtain better results, the exponential window was used considering the use of a hammer for the excitation of the structure. The examining of the results and obtained diagrams determined that the effect of shear forces on the total power flow was more than the effect of flexural forces. Moreover, the precision of two-point and four-point techniques was compared.

Keywords:

Power Flow Analysis, Cylindrical Shell; Modal Analysis

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