external force

armin najarian · June 5, 2016, 02:45

hi.
i have a boat that it has 6 degree of freedom and i want to give it an external force in the direction of the longitudinal axis of the boat? (instead of modeling its propeller)
so i need to write an expression for the external force and as i said my problem is 6dof.
at first i wanted to define a coordinate that moves with the rigid body. but i could not define coordinate like that.
so how should i give the boat an external force that always be in the direction of the longitudinal axis of the boat?

federicabi · June 15, 2016, 06:48

Sorry, wrong section

June 5, 2016, 02:45	external force	#1
armin najarian New Member armin najarian Join Date: Aug 2015 Posts: 14 Rep Power: 10	hi. i have a boat that it has 6 degree of freedom and i want to give it an external force in the direction of the longitudinal axis of the boat? (instead of modeling its propeller) so i need to write an expression for the external force and as i said my problem is 6dof. at first i wanted to define a coordinate that moves with the rigid body. but i could not define coordinate like that. so how should i give the boat an external force that always be in the direction of the longitudinal axis of the boat?

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June 15, 2016, 06:48		#2
federicabi Member Federica Biano Join Date: Feb 2016 Location: Genova, Italy Posts: 39 Rep Power: 10	Sorry, wrong section