A user`s manual for the program TRES4: Random vibration analysis of vertical-axis wind turbines in turbulent winds

Technical Report · Tue Mar 01 00:00:00 EST 1994

DOI:https://doi.org/10.2172/143973· OSTI ID:143973

TRES4 is a software package that works with the MSC/NASTRAN finite element analysis code to conduct random vibration analysis of vertical-axis wind turbines. The loads on the turbine are calculated in the time domain to retain the nonlinearities of stalled aerodynamic loadings. The loads are transformed into modal coordinates to reduce the number of degrees of freedom. Power spectra and cross spectra of the loads are calculated in the modal coordinate system. These loads are written in NASTRAN Bulk Data format to be read and applied in a random vibration analysis by NASTRAN. The resulting response is then transformed back to physical coordinates to facilitate user interpretation.

• Research Organization: Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Malcolm (David) Associates, Inc., Mississauga, ON (Canada)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: AC04-94AL85000
• OSTI ID: 143973
• Report Number(s): SAND-93-7015; ON: DE94009012
• Resource Relation: Other Information: PBD: Mar 1994
• Country of Publication: United States
• Language: English

Related Subjects

17 WIND ENERGY
99 MATHEMATICS
COMPUTERS
INFORMATION SCIENCE
MANAGEMENT
LAW
MISCELLANEOUS
WIND TURBINES
MECHANICAL VIBRATIONS
MANUALS
T CODES
FINITE ELEMENT METHOD
TURBULENCE
FREQUENCY ANALYSIS