User`s guide for the frequency domain algorithms in the LIFE2 fatigue analysis code
- Sandia National Labs., Albuquerque, NM (United States)
- New Mexico Engineering Research Inst., Albuquerque, NM (United States)
The LIFE2 computer code is a fatigue/fracture analysis code that is specialized to the analysis of wind turbine components. The numerical formulation of the code uses a series of cycle count matrices to describe the cyclic stress states imposed upon the turbine. However, many structural analysis techniques yield frequency-domain stress spectra and a large body of experimental loads (stress) data is reported in the frequency domain. To permit the analysis of this class of data, a Fourier analysis is used to transform a frequency-domain spectrum to an equivalent time series suitable for rainflow counting by other modules in the code. This paper describes the algorithms incorporated into the code and their numerical implementation. Example problems are used to illustrate typical inputs and outputs.
- Research Organization:
- Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); New Mexico Engineering Research Inst., Albuquerque, NM (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC04-94AL85000
- OSTI ID:
- 10110556
- Report Number(s):
- SAND-93-1900; ON: DE94004678; BR: GB0103012
- Resource Relation:
- Other Information: PBD: Oct 1993
- Country of Publication:
- United States
- Language:
- English
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