On the influence of boundary conditions on the modal properties of a base frame |
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| Authors: | Maik Renning Kerstin Kracht Utz von Wagner Philipp Köster Taner Bozkurt |
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| Institution: | 1. Chair of Mechatronics and Machine Dynamics, Department of Applied Mechanics, Technische Universitaet Berlin, MS1, Einsteinufer 5, 10587 Berlin, Germany;2. MAN Diesel & Turbo SE, Steinbrinkstr. 1, 46145 Oberhausen, Germany |
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| Abstract: | Supports of turbomachineries can be designed as base frames, which are constructions of steel-plates. One of the most important design requirements of the turbomachinery system is to avoid of natural frequencies in the operating speed range. Thus, a rotor dynamics analysis (see e.g. 1]), which is usually carried out using transfer matrix methods or finite element methods has to take the dynamic stiffness of the base frame into account. However, there are several problems to identify this complex and frequency dependent parameter, for example the localization of excitation or measurement responses and the difficulty of the support of base frames, e.g jack screws. In this article the support of a test base frames is analyzed by modal analysis experimentally. (© 2014 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim) |
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