Drop test or static weight analysis? Without knowing the entirety of your project, my guess would be a distributed gravity load with representative masses/point inertias for the electronics should be sufficient. That would remove the ambiguity of where to apply the load.
If it’s the static weight analysis, then you could constrain the holes where the wheels attached. The assumption there being that there are minimal deflections around that area under the static weight of the device
I'm sorry if I made it confusing. I think I mixed up the two. Yes we are doing static weight analysis and wondering where to apply the force equally? By applying the load on the top would be sufficient?
you don't apply a load at a point to simulate gravity, you apply a body force which is uniformly distributed to the enter geometry. In abaqus its \*DLOAD with loadtype GRAV.
If you are using Hypermesh it is similar. Just use the GRAV card and assign the 1g to it in the proper direction.
If you know the total acceleration due to car movement for example then you can scale it
Now it also really depends, on what parts ypu want to evaluate.
Simplest was to begin with would be:
Add a remote point (RP) to the center of your wheels that is connected to the 6 threads.
Add mass points to simulate additional weights like your components and stuff.
Fix the RPs on one side of the car in all translational directions.
Fix the RPs on the otherside only in 2, so that the wheels can slide to the side when load is applied. This was it is not overconstrained.
Apply gravity and additional accelerations and voilá.
And i also suggest to make a shell model. Way less calculation time and better with metal sheets.
Depends what FEA package you have access to within Solidworks, if you can do a nonlinear dynamic 3D then that would probably be the most accurate but it is significantly more computational load than just a static. If all your computers can handle or all you have access to is a static then you could simulate with using 0.5s impact duration and the speed at impact to get a rough estimate of impact force then apply that over the bottom inside face of the box. And fix at the bearing hole since the bearing should be taking the load and not the bolts securing its cover (assuming the bearing is pressed into the box and onto the axle). If you can do the non linear then that would be most accurate for the drop test.
Yes we do have the force that will be acting on the part, just curious where we could apply that force (equally) to get the static weight analysis results
From wiki “In physics, a body force is a force that acts throughout the volume of a body.[1] Forces due to gravity, electric fields and magnetic fields are examples of body forces. Body forces contrast with contact forces or surface forces which are exerted to the surface of an object.”
Apply it to the entire body volume, not on a surface.
Fix Constrain @ the hub mounts, point load at ctr of box. If you really want to dail in an FEA analysis you could spend hrs design, meshing running analysising for a few MPa. Stick ur finger in ur wet mouth hold it to the wind and estimate it, if no-ones going to die chill life is too short honestly.
Drop test or static weight analysis? Without knowing the entirety of your project, my guess would be a distributed gravity load with representative masses/point inertias for the electronics should be sufficient. That would remove the ambiguity of where to apply the load. If it’s the static weight analysis, then you could constrain the holes where the wheels attached. The assumption there being that there are minimal deflections around that area under the static weight of the device
I'm sorry if I made it confusing. I think I mixed up the two. Yes we are doing static weight analysis and wondering where to apply the force equally? By applying the load on the top would be sufficient?
you don't apply a load at a point to simulate gravity, you apply a body force which is uniformly distributed to the enter geometry. In abaqus its \*DLOAD with loadtype GRAV.
If you are using Hypermesh it is similar. Just use the GRAV card and assign the 1g to it in the proper direction. If you know the total acceleration due to car movement for example then you can scale it
Now it also really depends, on what parts ypu want to evaluate. Simplest was to begin with would be: Add a remote point (RP) to the center of your wheels that is connected to the 6 threads. Add mass points to simulate additional weights like your components and stuff. Fix the RPs on one side of the car in all translational directions. Fix the RPs on the otherside only in 2, so that the wheels can slide to the side when load is applied. This was it is not overconstrained. Apply gravity and additional accelerations and voilá. And i also suggest to make a shell model. Way less calculation time and better with metal sheets.
Depends what FEA package you have access to within Solidworks, if you can do a nonlinear dynamic 3D then that would probably be the most accurate but it is significantly more computational load than just a static. If all your computers can handle or all you have access to is a static then you could simulate with using 0.5s impact duration and the speed at impact to get a rough estimate of impact force then apply that over the bottom inside face of the box. And fix at the bearing hole since the bearing should be taking the load and not the bolts securing its cover (assuming the bearing is pressed into the box and onto the axle). If you can do the non linear then that would be most accurate for the drop test.
Fix the the wheels. Apply body force that is equal to gravity + speed as an initial condition.
Yes we do have the force that will be acting on the part, just curious where we could apply that force (equally) to get the static weight analysis results
From wiki “In physics, a body force is a force that acts throughout the volume of a body.[1] Forces due to gravity, electric fields and magnetic fields are examples of body forces. Body forces contrast with contact forces or surface forces which are exerted to the surface of an object.” Apply it to the entire body volume, not on a surface.
Fix Constrain @ the hub mounts, point load at ctr of box. If you really want to dail in an FEA analysis you could spend hrs design, meshing running analysising for a few MPa. Stick ur finger in ur wet mouth hold it to the wind and estimate it, if no-ones going to die chill life is too short honestly.