Construction of a mathematical model of the perspective design of the bridgetunne for passenger vehicles
In the present paper for the passage of passenger vehicles is proposed to develop a model bridgetunnel cylindrical type and to justify the possibility of applying the sustainability criteria from wind loads and shock waves inside the shell with the possibility of installation of the isolators damping of dynamic effects, both from vehicles and from wind to wind flow. In order to ensure the possibility of practical use of the bridge for real vehicles, the problem of ensuring the strength and stability of the bridge shell with the dynamic interaction of the wave from the movement of the crew is formulated and this problem is solved in the first approximation, which is sufficient to begin detailed study of the designs of the proposed construction of the transport infrastructure. A feature of the calculations of this facility is the need to take into account the double dynamic effects: from passing vehicles and wind flows. Calculations of wind flows and impacts on bridge structures in the work is reduced to the solution of unsteady nonlinear three-dimensional equations of fluid dynamics taking into account the viscosity in the formulation of the Navier-Stokes equations. The problem of the vehicle's influence on the bridge structure shell is set in such a way that between the drummer and the target there is an insulator consisting of viscous and elastic elements, which in various combinations can extinguish the oscillatory movements of the structure