fix a model in ANSYS explicit dynamic for supersonic flow in Aluminum -- 3

I have a model of a sphere projectile impacting a plate. The velocity is 10000m/sec so it is higher than the speed of sound in Aluminum (which is about 5000m/sec). so the flow is supersonic in the aluminum. The problem is that the analysis runs and wfter a certain time it is not converging in a reasonable time. Yoy need to fix the model so it will compute the whole way till it penetrates the plate and gone through the plate. the deliverables are: 1. fix the model to be run the whole way till it penetrate the plate and deliver project files. 2. prepare a document that will explain step by step what has been done with screenshots.