Seismic evaluation of a large nuclear pump bearing using non-linear dynamic analysis
Hydrostatic bearings of a large vertical pump using sodium as the lubricant were critically examined to determine their ability to withstand seismic loads. Initial linear dynamics analyses predicted journal displacements to exceed bearing clearance by a ratio of 3:1. Equivalent time-history excitations were then developed from the response spectra to determine the number, magnitude, and duration of the bearing impact loads. Predicted loads were further reduced by 50% by modeling non-linear bearing characteristics normally present but not generally included in conventional linear analyses. Results are presented of the comprehensive design evaluation performed, based on these non-linear predictions, that assess stress, wear, and fatigue to demonstrate hydrostatic bearing integrity.
- Research Organization:
- Borg-Warner Corp., Carson, CA (USA). Byron Jackson Pump Div.
- DOE Contract Number:
- AT03-76SF72025
- OSTI ID:
- 5969560
- Report Number(s):
- CONF-830607-20; ON: DE83015539
- Resource Relation:
- Conference: American Society of Mechanical Engineers pressure vessel and piping conference, Portland, OR, USA, 19 Jun 1983; Other Information: Portions are illegible in microfiche products
- Country of Publication:
- United States
- Language:
- English
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