Frequency-domain stress prediction algorithm for the LIFE2 fatigue analysis code

Conference · Wed Jan 01 00:00:00 EST 1992

OSTI ID:5082884

Sutherland, H J

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 mount 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 module has been added to the code. The module transforms the frequency 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 uses experimental data to illustrate their use. 10 refs., 11 figs.

• Research Organization: Sandia National Labs., Albuquerque, NM (United States)
• Sponsoring Organization: USDOE; USDOE, Washington, DC (United States)
• DOE Contract Number: AC04-76DP00789
• OSTI ID: 5082884
• Report Number(s): SAND-91-0821C; CONF-920122-2; ON: DE92000247
• Resource Relation: Conference: American Society of Mechanical Engineers (ASME) energy sources technology conference and exhibition, Houston, TX (United States), 26-30 Jan 1992
• Country of Publication: United States
• Language: English

Related Subjects

17 WIND ENERGY
99 GENERAL AND MISCELLANEOUS//MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE
WIND TURBINES
STRESS ANALYSIS
ALGORITHMS
FATIGUE
FOURIER TRANSFORMATION
FRACTURE MECHANICS
L CODES
SERVICE LIFE
COMPUTER CODES
INTEGRAL TRANSFORMATIONS
MACHINERY
MATHEMATICAL LOGIC
MECHANICAL PROPERTIES
MECHANICS
TRANSFORMATIONS
TURBINES
TURBOMACHINERY
170602* - Wind Energy Engineering- Turbine Design & Operation
990200 - Mathematics & Computers