Document Type thesis Author Name Giorelli, Massimo URN etd-0426102-130749 Title Methodology for Correlating Experimental and Finite Element Modal Analyses on Valve Trains Degree MS Department Mechanical Engineering Advisors Professor Robert L. Norton, Advisor Professor Joseph J. Rencis, Committee Member Professor Mikhail F. Dimentberg, Committee Member Professor John M. Sullivan Jr., Graduate Committee Rep Donald A. Jacques, Committee Member Keywords correlation modal analysis valve train Date of Presentation/Defense 2002-03-05 Availability unrestricted
The widespread use of finite element models in assessing system dynamics for noise, vibration, and harshness (NVH) evaluation has led to recognition of the need for improved procedures for correlating models to experimental results. This study develops and applies a methodology to correlate an experimental modal analysis with a finite element modal analysis of valve trains in IC-engines. A pre-test analysis procedure is employed to guide the execution of tests used in the correlation process. This approach improves the efficiency of the test process, ensuring that the test article is neither under nor over-instrumented. The test-analysis model (TAM) that results from the pre-test simulation provides a means to compare the test and the model both during the experimental approach and during the model updating process. The validity of the correlation methodology is demonstrated through its application on the valve train of a single overhead cam (SOHC) engine.
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