Problem on Equilibrium ( STATICS )

[lakuzamalakuzam]

so i was wondering what assumptions needed to make this solvable and ' support at both thrust collars can totally support the moments of 400 Nm before they slip' means which axis of moment

 

[Baluncore]

Is this a homework problem?

There is a contradiction, in that the “thrust collars” must withstand a moment.
Thrust would be axial, moment would be about the axis.

Is that a moment of 400 N⋅m each, making 800 N⋅m, or a total of 400 N⋅m together ?

How much does the structure weigh, is that important ?

You need to provide some feedback to the answers you receive.

 

[lakuzamalakuzam]

Yeah It's a homework problem.
I'm not sure what the problem means when it says 400 NM but from my understanding i think it is in OA axis with assumption that the system is properly aligned.
The structure weight is negligible.

 

[Baluncore]

The structure weight is negligible.

Is that a specified assumption, or an additional assumption ?

 

[lakuzamalakuzam]

Yeah It's a homework problem.
I'm not sure what the problem means when it says 400 NM but from my understanding i think it is in OA axis with assumption that the system is properly aligned.
The structure weight is negligible.

but then there will be 9 unknowns ( Fx ,F//OA, Fperpendicular to OA, couple in OA axis for each of the thrust collar and W) with 3 scalar equation and 1 vector equation = 4 eq
so i think i will have to make further assumptions like there are no support reaction on the upper thrust collar and now there are 5 unknowns which isn't solvable

 

[lakuzamalakuzam]

Is that a specified assumption, or an additional assumption ?

additional assumption

 

[Baluncore]

The horizontal radius from O-B confuses things.
Too many equations, and not enough understanding of the system.

To resolve the moment, should it not be sufficient to resolve the distance of the hanging weight from ZY plane that contains the O-A axis, and the angle of the O-A axis to the horizontal ?