Integrated Testing and Analysis

by Greg Miller, Impell Corp, Walnut Creek, CA, USA,
Randy Wheaton, Impell Corp, Walnut Creek, CA, USA,
Alejandro Asfura, Impell Corp, Walnut Creek, CA, USA,
Guilio Maleci, Impell Corp, Walnut Creek, CA, USA,

Document Type: Proceeding Paper

Part of: Structural Engineering in Nuclear Facilities


This paper represents a new approach which greatly streamlines the entire process. In those cases where finite element modeling is used without test verification, the procedure consists of an efficient algorithm for the direct generation of the RRS at any location. It eliminates the need for a time history analysis. The algorithm is accurate regardless of the shape of the input spectrum. A modal perturbation scheme is included in the process so that alternate locations for the equipment can be evaluated without repeating the finite element analysis. Where testing is employed, the software used for the generation of secondary spectra can be incorporated into the microcomputer used to obtain and process the test data. The modal properties, derived from test, provide the basis for generating the RRS at the equipment location. Structural modifications to the support structure can be simulated without repeating the test, as can alternate locations for the equipment. This integrated testing and analysis program can be accomplished entirely on site, and requires no finite element modeling.

Subject Headings: Equipment and machinery | Algorithms | Computer software | Finite element method | Field tests | Modal analysis | Nuclear power | Power spectral density

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