Time-domain simulations of the loads on wind
energy conversion systems have been hampered in the
past by the relatively long computational times for
nonlinear structural analysis codes. However, recent
advances in both the level of sophistication and
computational efficiency of available computer
hardware and the codes themselves now permit longterm
simulations to be conducted in reasonable times.
Thus, these codes provide a unique capability to
evaluate the spectral content of the fatigue loads on a
turbine. To demonstrate these capabilities, a Micon
65/13 turbine is analyzed using the YawDyn and the
ADAMS dynamic analysis codes. The SNLWIND 3-D
simulator and measured boundary conditions are used
to simulate the inflow environment that can be
expected during a single, 24-hour period by a turbine
residing in Row 41 of a wind farm located in San
Gorgonio Pass, California. Also, long-term simulations
(up to 8 hours of simulated time) with constant average
inflow velocities are used to better define the
characteristics of the fatigue load on the turbine.
Damage calculations, using the LIFE2 fatigue analysis
code and the MSU/DOE fatigue data base for
composite materials, are then used to determine
minimum simulation times for consistent estimates of
service lifetimes.
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发表于 2008-4-26 17:21:52
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