multiple drop test in 1 analysis
multiple drop test in 1 analysis
(OP)
i am modeling a helmet that needs to undergo 3 drop tests in one analysis
it needs to drop at a velocity 3m/s where i request the deceleration data, it then needs to drop 5.9m/s and then a third drop of 5.9m/s, how do i do this as i cant add a step after the 1st drop that will allow me to change the velocity of the helmet
any help?
it needs to drop at a velocity 3m/s where i request the deceleration data, it then needs to drop 5.9m/s and then a third drop of 5.9m/s, how do i do this as i cant add a step after the 1st drop that will allow me to change the velocity of the helmet
any help?





RE: multiple drop test in 1 analysis
Rob Stupplebeen
RE: multiple drop test in 1 analysis
is there some way of stringing 3 tests together and keep the deformed helmet for each one or do the 3 drops in one tests to replicate this?
RE: multiple drop test in 1 analysis
Rob Stupplebeen
RE: multiple drop test in 1 analysis
It may get a little tricky if the helmet is allowed to rotate during impact. In that case preparing for the next impact will be a little harder but doable.
Nagi Elabbasi
Veryst Engineering
RE: multiple drop test in 1 analysis
RE: multiple drop test in 1 analysis
Nagi Elabbasi
Veryst Engineering
RE: multiple drop test in 1 analysis
RE: multiple drop test in 1 analysis
1, initial velocity
2, free fall on to surface 1
3, initial velocity turn off surface 1
4, free fall onto surface 2
5, initial velocity turn off surface 2
6, free fall onto surface 3
You may need to add an additional relocation step to orient and position the helmet reliably. I hope this helps.
Rob Stupplebeen
RE: multiple drop test in 1 analysis
Initial Step: Initial velocity of 3 m/s
Step 1: First impact with surface
Step 2: Velocity BC of 5.9 m/s to prepare helmet for second impact
Step 3: Remove velocity BC, impact second surface
Step 4: Velocity BC of 5.9 m/s to prepare helmet for third impact
Step 5: Remove velocity BC, impact third surface
RE: multiple drop test in 1 analysis
RE: multiple drop test in 1 analysis
RE: multiple drop test in 1 analysis
Rob Stupplebeen
RE: multiple drop test in 1 analysis
RE: multiple drop test in 1 analysis
exactly as you said
1 initial 3.42ms
2 drop 1
3 velocity 5.42
4 turn off v5.42 - impact
5 velocity 5.42
6 off v5.42 then impact