Assignment 6-Frontal Crash Simulation Challenge

Objective: The objectve of this project is to run a frontal crash simulation with the requested parameters.

Procedure:

-Firstly, open HYPERMESH software and choose RADIOSS profile.

-You can either run this simulation in HYPERCRASH as well.

-Now, import the 0000.rad file to the RADIOSS profile.

-Now, firstly check the units of the geometry. I preffer(Kg mm ms).

-Now, check the geometry for any Intersections and penetrations. If there are any use the automatic penetration fix option to fix the penetartions.

-Now, delete all the interfaces present in the geometry and create a new type-7 interface with preffered parameters and assign friction of 0.2 to the interface.

-Now, check wheather there are any issues with the rigid bodies present in the geometry.

-Now, to create a rigid wall we need to go to the solver deck, right click->create->RWALL->Plane. Now, In the card there will be engineering data and to choose the location of the wall you need to choose the point on the car and give the normal direction facing the car.

-Now, to get the COG(Center of gravity) of the geometry to the centre we need to add mass to the geometry where it is necessary because, in the actual car there will be seats and passengers present.

-So, In order to brinfg the COG to it's dessired position we need to ass masses.

-Now, add initial velocity of 35mph i.e 15.6mps to the geometry.

-Now, before running we need to assign the output parameters as requested.

-Firstly, we need to add Cross-sections to the Rails, Shortgun and A pillar.

-Now, we need to add accelerometers to the base of the B pillar rockers.

-Now, we need to add the axial load to the rails which is received from the bumper during the impact.

-And finally Intrusion on the dash wall.

-Now, we need to request outputs from the solver after analysis.

-Cross-sectional forces on the rails, shot gun and A pillar

-Axial force on the rails from bumper.

-Accelerators resultant acceleration.

Errors:

While running the simulation I have faced an error with the springs. As we will be switching from hypercrash to radioss and vise versa there will be some unsupported cards created. Hence that error will be popping. To resolve that we need to delete all the unused cards and then try to dry run.

Then if you can see that the analysis goes through without any errors.

Result:

The Frontal crash simulation is the basic simulation where you will be exploring a variety of parameters within the software, to run the anlaysis you need to have knowledge of what parametrs to use and what does these parameters mean.

Here in this simulation we will be assigning the cross-sections, accelerometers, axial loads and intrusions.

From the animation we can see that the LH side of the BIW is absorbed more energy than that of the RH side. Hence, the LH side is undergoing large deformation when compared to that of the RH side.

The actual destruction of the vehicle is avoided and the crash test using simulation becomes economical.