ANSYS4ALL

How to stop unwanted penetrated flow of eulerian fluid elements over Lagrangian solid elements ?

I'm doing on analysis of the response of occupants inside a vehicle subjected for blast load at the surface of where the vehicle is stand over. the problem is, when the eulerian tnt element is explode/burst directly penetrate to Lagrangian element solid compartment body instead of collide. so anybody who have the solution please make my life easy. thank you!