Stochastic Response of Piping Systems With Flexible Supports

[+] Author and Article Information
H. O. Soliman

Department of Civil Engineering, Zagazig University, Zagazig, Egypt

T. K. Datta

Department of Civil Engineering, Indian Institute of Technology, New Delhi-110016, India

J. Pressure Vessel Technol 118(1), 109-114 (Feb 01, 1996) (6 pages) doi:10.1115/1.2842152 History: Received June 20, 1994; Revised June 01, 1995; Online February 11, 2008


A frequency domain spectral analysis of piping systems with flexible supports is presented for uniformly modulated nonstationary support excitations. The support points are idealized by spring-dashpot arrangements. The equations of motion of the resulting nonclassically damped, multipoint excitation system are written and solved in terms of the absolute displacements of the dynamic DOF. This facilitates a direct computation of the dynamic stresses induced at various cross sections of the pipe segments. The method of analysis provides a quasi-stationary response based on the assumption that the modulating function varies slowly with time; the exact response analysis in frequency domain for such systems with nonstationary support excitation is difficult to determine. Using the method of analysis presented, the response of a piping system is obtained for a set of important parametric variations related to the flexibility, damping, and excitation of the supports.

Copyright © 1996 by The American Society of Mechanical Engineers
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