Modeling of structure noise generated during the contact of rail and wheel

The calculating method the associated vibro-acoustic tasks by the finite elements based on piston analogy. First identify the moving components of finite-dimensional model of aggregate surfaces of rails and wheels, and then, moving nodes are represented acoustic piston forming piston group. As a result of the impact of the wheel, as the concentrated masses on the rail, in the vertical plane, of the conical surface wheels, is a bend of the rail in the horizontal plane. The processes of bending and restore the flow dynamics, the moving surface of rail and wheel we imagine distributed elementary pistons creating in each point of the air volume of the sound pressure. The total pressure is determined by the formulas of the logarithmic summation.