locking rotational motions of platform in ADAMS

Wind & Water Computer-Aided Engineering Software Tools
#1

hi,
I want to lock rotational motions of platform for OC3 in ADAMS, Could you tell which MOTIONs statements(IDs) I must deactivate within acf file?
Or let me know if there is other way to lock rotational motions of platform?

Regards,

#2

Dear Mehdi,

If you wish to lock the rotational motions of the floating platform in an ADAMS model, you shouldn’t include the line “DEACTIVATE/JPRIM, ID = 1000” in your ADAMS control (*.acf) file.

Best regards,

#3

What about locking only one rotational motion (e.g. pitching of floating platform)? So the roll and yaw can have motion.

#4

Dear Mehdi,

As it is now, the JPRIM constraint is used to enable or disable all rotational DOFs of the floating platform collectively. If you want only 1 or 2 rotational DOFs enabled, you’ll need to modify the ADAMS model (e.g., to include a JOINT statement).

Best regards,

#5

I want to lock displacement and rotational motions of elements of wind turbine blades in ADAMS(indeed converting each flexible blade to a rigid blade), Could you tell which statements(IDs) I must deactivate within acf file?
What about doing same work for tower in ADAMS(I mean whole the tower be rigid body like platform)?
Another question:
What statements do I use in adm file to measure the rotor thrust and rotor bending moment exerted on LSS?
I know the rotor thrust is available through adams output plt file, but as i linked ADAMS with Simulink, I must measure this parameter through adm file.

#6

Dear Mehdi,

Actually, the DEACTIVATE statements remove constraints (i.e., they remove the fixed JOINTS that otherwise would make the blades rigid). If you want to keep the constraints enabled, you should remove the DEACTIVATE statements. See the file, “FAST2ADAMSStatements.xls” for the list of JOINTS (and other ADAMS statements) created by the FAST-to-ADAMS preprocessor.

Best regards,