- #1
frostie
- 3
- 0
Hi there,
For my Final Year Project at University I am analysing Road Restraint Systems/Safety Barriers in a Finite Element Analysis package.
My problem is calculating the force exerted onto the barrier by a vehicle during a collision, more specifically the time over which this impact occurs.
Using d (this distance over which the impact occurs) isn't an option as this is an unknown that is calculated during the analysis.
What I've got so far...
E=1/2mv2
Momentum = mv=2E/v
Momentum = F. delta t = 2E/v
Therefore, F = 2E/v.delta t
What I really need is an assumed value of delta t from past numerical or field tests. I've searched for journals with such information with no luck. Failing that a method or idea how else to calculate the force exerted on the barrier from a vehicle.
Any help would be greatly appreciated.
Regards,
Frostie
For my Final Year Project at University I am analysing Road Restraint Systems/Safety Barriers in a Finite Element Analysis package.
My problem is calculating the force exerted onto the barrier by a vehicle during a collision, more specifically the time over which this impact occurs.
Using d (this distance over which the impact occurs) isn't an option as this is an unknown that is calculated during the analysis.
What I've got so far...
E=1/2mv2
Momentum = mv=2E/v
Momentum = F. delta t = 2E/v
Therefore, F = 2E/v.delta t
What I really need is an assumed value of delta t from past numerical or field tests. I've searched for journals with such information with no luck. Failing that a method or idea how else to calculate the force exerted on the barrier from a vehicle.
Any help would be greatly appreciated.
Regards,
Frostie