Sensitivity of the Dynamic Behavior of Structures to System Parameter Changes

[+] Author and Article Information
R. Nordmann

University of Kaiserslautern, Kaiserslautern, Federal Republic of Germany

H. Eckey, P. Kaas, M. Steinwarz

Kraftwerk Union AG, Offenbach, Federal Republic of Germany

J. Pressure Vessel Technol 111(3), 285-290 (Aug 01, 1989) (6 pages) doi:10.1115/1.3265676 History: Received March 15, 1985; Revised January 30, 1989; Online November 05, 2009


A new calculation procedure has been developed to evaluate the influence of parameter changes to the dynamic behavior of structures. By this sensitivity analysis the variations of natural frequencies and natural modes can be expressed, generated by specific parameter alterations. Combined with modal methods, for example the response spectrum modal analysis, the changed dynamic response (displacements, internal forces) can also be found. The algorithm is suitable in connection with standard finite element routines, to investigate the effect of parameter modifications in relation to the dynamic characteristics of an original system. For a large vessel piping system, the influence of a spring stiffness variation to the natural frequencies and internal forces is demonstrated.

Copyright © 1989 by ASME
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