Assignment 6-Frontal Crash Simulation Challenge

PROJECT

AIM:

Frontal crash-BIW

• Check unit system and either follow[Mg mm s] or [Kg mm ms].
• Create appropriate interface ,friction 0.2 and recommended parameters.
• Make sure of no penetrations and intersection.
• Correct rigid bodies if any issues.
• Create rigid wall with friction 0.1.
• Compare the model weight with the full scale 300k nodes model and use added masses to reach target weight 700kg while getting CG about the required range.
• Initial velocity 35 mph.
• Use model checker to ensure good quality.
• Time-step :0.5 to 0.1 microseconds.
• Run 80 ms.

• Output requests:

  • Sectional force in the rails at location of indicated node 174247.
  • Axial force received on the rails from bumper.
  • Shotgun cross sectional forces.
  • A pillar cross section.
  • Acceleration curve received on the accelerometer at base of B pillar (on B pillar rocker).
  • Intrusions on the dash wall 66695,66244.

  Note:

  1. Submit your simulation files including time and h3d files.
  2. Plot energies and notice any difference.

Explain your errors and how to rectify?

PROCEDURE:

1.IMPORT GEOMETRY>DELETE THE DUPLICATE FILES IN CARDS>CHECK FOR UNITS.

2.SOLVER>BEGIN CARD>CHECK FOR UNITS.SELECT FOR SLAVE AND MASTER NODES.

3.SOLVER>CREATE>INTER>TYPE7,INSIF-4,IGAP-2,IDEL-2,FRICTION-0.2,GAPMIN-0.5.

4.TOOLS>CHECK PENETRATION AND INTERSECTION.

5.SOLVER>CREATE>RWALL>PLANE>SELECT NODES.

6.SOVER>INIVEL>GIVE XM,YM,ZM,NORMAL,DSEARCH,FRIC,INITIAL VELOCITY-15.16.

7.ADMASS>MASS TYPE>GRND ID>MASS.

8.TOOLS>MODEL CHECKER>CHECK FOR ANY FAULT.

9.CARDS>ENG_ANIMDT>TFREQ-5.

10.CARDS>ENG_RUN>TSTOP-80.

OUTPUT:

1.CREATE FRAMES>MOV>SELECT Z-AXIS,SELECT NODES-ORIGIN,X AXIS,Y AXIS.

2.SELECT THE SAME SEVEN FRAMES FOR ALL THE SECTIONS.

3.SOLVER>CREATE>SECT-SELCT FOR RAILS,SHORTGUN,A PILLAR,BUMPER.

4.GO TO 1D>SPRINGS>GIVE NODE ID-66695,66244 FOR BOTH THE SPRINGS.

5.MODEL>CREATE>ACCELOMETER.

6.SOLVER>CREATE>TH>SECTION,INTEL,ACCEL,SPRING,RWALL.