MBD results to OptiStruct Fatigue for a truck

Brian_20847

Hi everyone,

I want to use Fatigue simulation from MBD results for chassis.

Can you share the process from MBD results to OptiStruct Fatigue for a chassis of a truck? I am refer Truck 6x4 (N post events) exercise.

Thanks.

GTT Adam

Hi @Brian_20847,

In general, the procedure is as follows:

1. Build and validate a MBD model of your vehicle using measured test data.
2. Simulate either driven or shaker-post events that correspond to various load cases you are looking to use for your fatigue model.
3. Extract time-series loads from each joint connection to use as inputs to your fatigue model.
4. Post process the results to obtain a rainflow count of the loads (load magnitude vs. cycles).
5. Simulate the loads and cycles in your fatigue model.
6. Calculate life of the component or system.

Hope this helps!

Adam Reid