MegaStructures
Structural
- Sep 26, 2019
- 376
I'm hoping for a quick sanity check.
I've been called in to help check the results of a motion analysis completed on a CAD package that calls for a seemingly unreasonably high force to lift a small man basket. I have a model in SAP2000 of the basket and mechanical linkages and believe that if I do the following I will be able to find the force required to lift the basket:
1) Replace all members with rigid links
2) Place a pinned boundary condition at the location of force input
3) Run various static analyses, one at each stage of motion
4) Check the reaction at the force input boundary <--- The force applied must be equal to or greater than this value to start motion in the opposite direction
I would do a simple hand calculation to sum the moments about the hinge point, but there is a fair amount of linkages and a couple rotation points and I would prefer to let SAP do the math for me in this case (not my day job just trying to ball park a reasonable figure
“The most successful people in life are the ones who ask questions. They’re always learning. They’re always growing. They’re always pushing.” Robert Kiyosaki
I've been called in to help check the results of a motion analysis completed on a CAD package that calls for a seemingly unreasonably high force to lift a small man basket. I have a model in SAP2000 of the basket and mechanical linkages and believe that if I do the following I will be able to find the force required to lift the basket:
1) Replace all members with rigid links
2) Place a pinned boundary condition at the location of force input
3) Run various static analyses, one at each stage of motion
4) Check the reaction at the force input boundary <--- The force applied must be equal to or greater than this value to start motion in the opposite direction
I would do a simple hand calculation to sum the moments about the hinge point, but there is a fair amount of linkages and a couple rotation points and I would prefer to let SAP do the math for me in this case (not my day job just trying to ball park a reasonable figure
“The most successful people in life are the ones who ask questions. They’re always learning. They’re always growing. They’re always pushing.” Robert Kiyosaki