ME 115 Final Project Truck Jump

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Presentation transcript:

ME 115 Final Project Truck Jump Created By: Joshua Perron Matt Dillon Brande Hubbard Professor: Jose Granda December 17, 2006

Project Objectives Choose analysis criteria Design model in Working Model 2D Design model in Nastran 4D Determine results

Design Criteria In this experiment, we are going to find the impulse forces on the front wheel of a truck. The truck is to travel up a small inclination at forty-two miles per hour. Once the truck hits the ramp, the vehicle will leave the ground, rotate, and land with the full weight of the vehicle on the front suspension system.

Working Model 2D For this stage, all the components of the system and it’s surroundings were drawn and given values Then, several tests were run to determine the effects of different velocities, masses of components, and spring and damper rates.

Working Model Surroundings The ramp used to launch the vehicle.

Working Model Test This is as screen shot of the test in action.

Working Model Video

Solidworks Modeling Our system was modeled using Solidworks 2006. The system was modeled by each component and then assembled in the Solidworks program.

Rim, Tire, & Assembly

Axel, Spring, & Axel Assembly

Frame, Bed, & Cab

Final Assembly

Nastran 4D For this stage, the vehicle is imported from the Solidworks program. Then, several tests were run to determine the effects of different velocities, masses of components, and spring and damper rates.

Nastran 4D Surroundings This is the roadbed and ramp used for our Nastran testing.

Construction of Surroundings The road bed is made of a simple rectangular cube as the road surface, with a long, flat extruded triangle as the ramp.

Nastran 4D Test This is a screen shot of the Nastran test in action.

Nastran Video

Results According to the Working Model 2D analysis, the front suspension system is subjected to a 22,230 lb force at impact. This conclusion sounds somewhat realistic. Our Nastran results came out to be a little different, however. The left wheel is showing about a 95,000 mph lb force at impact, while the right wheel is showing almost 115,000 mph lb force at impact. The differences could be attributed to the fact that the launch ramps are not exactly the same, so the height of the truck will be different in each scenario.