Award Date

1-1-2007

Degree Type

Thesis

Degree Name

Master of Science (MS)

Department

Mechanical Engineering

First Committee Member

Georg F. Mauer

Number of Pages

74

Abstract

Shaker table assemblies can exhibit resonances within their frequency range of operation. The spectral analysis of a six-axis shaker system permits the identification and prediction of resonance frequencies. In the project described here, a small six-axis shaker was tested experimentally. In parallel with the experiments, Finite Element (FE) models of the shaker were generated, and their dynamic performance was simulated. Time data from experimental test series were compared with the responses from FE analysis obtained for identical test conditions. The comparison of the response spectra between experiments and simulation permits the assessment and validation of FE analysis as a predictive tool for designing larger multi-axis shakers. The power density and coherence frequency response spectra for the entire 6x6 control matrix are computed in Matlab, creating a detailed performance assessment for all aspects of the 6x6 control matrix. A new FE model of a larger 6-axis shaker table has been created. The design seeks to minimize the inertial table mass, while maintaining platform stiffness such that all eigenvalues are above the shaker table's operational frequency range.

Keywords

Analysis; Axis; Design; Shaker; Six; Spectral; Systems

Controlled Subject

Mechanical engineering

File Format

pdf

File Size

2068.48 KB

Degree Grantor

University of Nevada, Las Vegas

Language

English

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