Complex geometries often result in complex connections. In the field of temporary structures and amusement rides, standard connections which are regulated by a norm are the exception. Furthermore joints should often be realized using hollow sections which are only marginally treated in literature and standards. Here special solutions with the aid of computational FEM analyses and in combination with experience in design engineering are required.
The same applies to fatigue calculations of complex connections. Besides relevant specialized literature, the B&W engineering company uses the Finite Element Method to investigate notch stresses and to guarantee the bearing capacity under cyclic loading or dynamic vibrations.
Expert knowledge in the field of computational mechanics and in design engineering is very important to properly address these problems. Dipl.-Ing. S. Buchberger is our competent contact, who is not only graduate engineer in mechanical engineering but also is a master toolmaker who contributes many years of professional experience as development and construction engineer to the B&W engineering company.
During his studies at the Chair of Structural Analysis and after his studies at the Department of Concrete Construction at the Technical University of Munich, Mr. Wittmann M.Sc. also worked on FEM calculations and developed and programmed new elements in the field of plate problems. He is familiar with the background and calculation processes of an FEM program and knows the special features of this method, so that the results can be trusted.
FEM analyses are setting new standards in the field of civil engineering and mechanical engineering. However, this method is also to be used with caution. If the engineer has no background knowledge, the results can be misunderstood and results can be very different from reality. Here a broad knowledge of the engineer is required, because plausibility checks are indispensable here. For example, the design and reinforcement of a concrete wall with large openings leads to an undersizing with the consequences of large cracks in the wall by FEM alone. For example, the modelling of the flow of force using a framework model can help to solve this problem. Therefore, FEM calculations are always checked by the B&W engineers with manual calculations and results from tables of relevant specialist literature.