Modal Testing Repeatability of a Population of Spherical Shells
- HYTEC, Inc., Boulder, CO (United States); Los Alamos National Laboratory
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
In this study, we investigated the variability in modal frequencies obtained from testing a set of hollow, almost spherical marine floats. We investigated four sources of variability: unit-to-unit variability, operator-to-operator variability, test repetition, and accelerometer placement. Because we measured the excitation and response of the marine floats, we were able to estimate impulse response and frequency response functions. Variability is assessed by measuring the deviation of each frequency response function from the mean curve for its test group.
- Research Organization:
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- W-7405-ENG-36
- OSTI ID:
- 828954
- Report Number(s):
- LA--14109
- Country of Publication:
- United States
- Language:
- English
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