The response of a tunnel structure under a moving and oscillating dynamic load can be calculated by means of a hybrid Integral-Transformation-Method-FEM approach. In the ITM approach analytical solutions of ideal geometries of the infinite continuum are superposed such that the wave-number impedance and transfer-function at the interior of a circular tunnel can be calculated efficiently. By this means the infinite continuum can be coupled to an arbitrary tunnel structure which is modelled by the FEM with corresponding form-functions. In order to reduce the effort for the coupling, the characteristics of the analytically given transfer-functions which can be split into near- and far-fields is taken into account.     «

The response of a tunnel structure under a moving and oscillating dynamic load can be calculated by means of a hybrid Integral-Transformation-Method-FEM approach. In the ITM approach analytical solutions of ideal geometries of the infinite continuum are superposed such that the wave-number impedance and transfer-function at the interior of a circular tunnel can be calculated efficiently. By this means the infinite continuum can be coupled to an arbitrary tunnel structure which is modelled by t...     »