User's Guide to BModes (Software for Computing Rotating Beam-Coupled Modes)
Abstract
This guide explains data preparation and execution with BModes, a finite-element code that provides dynamically coupled modes for a beam. The beam can be a rotating or non-rotating rotor blade or a tower, and it can have arbitrary distribution of structural properties and geometry along its length. A coupled mode implies presence of coupled flexural, axial, and torsion motions in a natural mode of vibration. Knowledge of flap-lag-torsion-axial coupled modes is crucial to several applications. Examples are: accurate modeling of major flexible components for modal-based aeroelastic codes such as FAST (Fatigue, Aerodynamics, Structures, and Turbulence), validation of flexible component models using experimental data, modal-based fatigue analysis, and interpretation of aeroelastic-stability behavior of turbines. Our plan is to eventually integrate BModes with FAST to provide tower and blade modes as rotor speed and blade pitch control settings change during a simulation. This guide provides step-by-step instructions on how to prepare input files (specify blade geometry, section properties, and finite-element discretization), how to execute the code, and how to interpret the outputs.
- Authors:
- Publication Date:
- Research Org.:
- National Renewable Energy Lab. (NREL), Golden, CO (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 861489
- Report Number(s):
- NREL/TP-500-39133
TRN: US200601%%875
- DOE Contract Number:
- AC36-99-GO10337
- Resource Type:
- Technical Report
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 17 WIND ENERGY; 99 GENERAL AND MISCELLANEOUS//MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE; AERODYNAMICS; DISTRIBUTION; GEOMETRY; ROTORS; SIMULATION; TORSION; TURBINES; TURBULENCE; VALIDATION; VELOCITY; WIND ENERGY; WIND TURBINES; CODES; SOFTWARE; ROTOR BLADE; TOWER; Wind Energy
Citation Formats
Bir, G. User's Guide to BModes (Software for Computing Rotating Beam-Coupled Modes). United States: N. p., 2005.
Web. doi:10.2172/861489.
Bir, G. User's Guide to BModes (Software for Computing Rotating Beam-Coupled Modes). United States. https://doi.org/10.2172/861489
Bir, G. 2005.
"User's Guide to BModes (Software for Computing Rotating Beam-Coupled Modes)". United States. https://doi.org/10.2172/861489. https://www.osti.gov/servlets/purl/861489.
@article{osti_861489,
title = {User's Guide to BModes (Software for Computing Rotating Beam-Coupled Modes)},
author = {Bir, G},
abstractNote = {This guide explains data preparation and execution with BModes, a finite-element code that provides dynamically coupled modes for a beam. The beam can be a rotating or non-rotating rotor blade or a tower, and it can have arbitrary distribution of structural properties and geometry along its length. A coupled mode implies presence of coupled flexural, axial, and torsion motions in a natural mode of vibration. Knowledge of flap-lag-torsion-axial coupled modes is crucial to several applications. Examples are: accurate modeling of major flexible components for modal-based aeroelastic codes such as FAST (Fatigue, Aerodynamics, Structures, and Turbulence), validation of flexible component models using experimental data, modal-based fatigue analysis, and interpretation of aeroelastic-stability behavior of turbines. Our plan is to eventually integrate BModes with FAST to provide tower and blade modes as rotor speed and blade pitch control settings change during a simulation. This guide provides step-by-step instructions on how to prepare input files (specify blade geometry, section properties, and finite-element discretization), how to execute the code, and how to interpret the outputs.},
doi = {10.2172/861489},
url = {https://www.osti.gov/biblio/861489},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Thu Dec 01 00:00:00 EST 2005},
month = {Thu Dec 01 00:00:00 EST 2005}
}