Search found 6 matches

by Kan.Zheng
Thu Mar 21, 2019 3:35 am
Forum: Computer-Aided Engineering Software Tools
Topic: MLIFE -wind-wave joint distribution
Replies: 0
Views: 3275

MLIFE -wind-wave joint distribution

Dear all Recently, I have use MLife to do some research on fatigue analysis for FOWT. But I have some questions to consult you. 1.In my research, fatigue damage is calculated based on the wind-wave joint distribution (joint probability distribution function is obtained in formula format), I want to...
by Kan.Zheng
Tue Mar 19, 2019 6:41 pm
Forum: Computer-Aided Engineering Software Tools
Topic: MLife Calculation
Replies: 1
Views: 4201

Re: MLife Calculation

Hello everyone, I am now trying to use MLife to calculate fatigue life of some wind turbines. However, I met some problems and Matlab complained like that: Attempted to access Fatigue.TimePP(398); index out of bounds because numel(Fatigue.TimePP)=225. Error in compute_windspeed_bins (line 56) Fatig...
by Kan.Zheng
Tue Dec 18, 2018 7:01 pm
Forum: Controls
Topic: N4 Overspeed,Na Overspeed and Normal stop
Replies: 6
Views: 3794

Re: N4 Overspeed,Na Overspeed and Normal stop

Dear Zheng, Again, I'm not familiar with the terms "N4 overspeed" or "Na overspeed" or the like and you haven't provided details on what you need changed, so, I'm not sure I can comment on how you can change the ServoDyn source code to tell the Bladed DLL the "signal code&q...
by Kan.Zheng
Tue Dec 18, 2018 2:18 am
Forum: Controls
Topic: N4 Overspeed,Na Overspeed and Normal stop
Replies: 6
Views: 3794

Re: N4 Overspeed,Na Overspeed and Normal stop

Dear Kan.Zheng, There is no documentation other than what has already been provided. That said, the topic of simulating special events and faults has been discussed several times on this forum, so you can probably search for the answer here. If your DLL follows standard Bladed DISCON DLL format, th...
by Kan.Zheng
Mon Dec 17, 2018 6:00 pm
Forum: Controls
Topic: N4 Overspeed,Na Overspeed and Normal stop
Replies: 6
Views: 3794

Re: N4 Overspeed,Na Overspeed and Normal stop

Dear Kan.Zheng, I'm not familiar with the terms "N4 overspeed" or "Na overspeed", so, I'm not sure how to answer your question. (Perhaps someone else on this forum can respond.) While there are few built-in control options in the ServoDyn module of FAST/OpenFAST, most control fu...
by Kan.Zheng
Fri Dec 14, 2018 8:02 pm
Forum: Controls
Topic: N4 Overspeed,Na Overspeed and Normal stop
Replies: 6
Views: 3794

N4 Overspeed,Na Overspeed and Normal stop

Hi everyone , I am simulating the cases according to IEC61400-3 ( Design situation 2.1). I want to simulate the situation about N4 overspeed and Na overspeed, usually called sofrware overspeed and hardware overspeed. I know we can simulated in Bladed by choose security chain cycle, but in Fast, how ...

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