Damages caused by winter storms are provoking enormous amounts of losses every year. Thereby a differentiated pattern of damages in structured terrain can be observed, which is mainly caused by the influence of the orography and which complicates measures of prevention. This influence of orographic structures on wind speed-ups should be shown in this work. For the calculation of the highly turbulent processes of atmospheric flow over terrain structures, the mesoscale model KAMM2 was applied. It was developed at the Institute for Meteorology and Climate Research (IMK) of the University of Karls\-ruhe. The model's design permits a selective investigation of flow processes caused by the orography. The simulations identified areas of elevated wind speed for idealised structures as well as for complex terrain. The influence on wind speed-ups of basic orographic structures could be determined in a differentiated way by their classification in complex terrain.