Development of a Full Parameterized FE-modeling Tool for Efficient Vibration Investigations on End Windings of Turbo- and Hydro-Generators  

作　　者：Bemd Schlegl Christian Scheinecker Andreas Marn Fritz Neumayer Mario Himmelreich Franz Heitmeir 

机构地区：[1]Machine Dynamics and Acoustics Department, Andritz Hydro GmbH, Weiz 8160, Osterreich [2]Institutfiir Thermische Turbomaschinen und Maschinendynamilq Technische Universitat Graz, Graz 8010, Osterreich

出　　处：《Journal of Energy and Power Engineering》2013年第8期1496-1504,共9页能源与动力工程（美国大卫英文）

摘　　要：End windings of generators are excited to vibrations due to electromagnetic forces which can cause severe damage and noise. To avoid this, it is important to predict the natural frequencies and modes of the end windings with finite elements. Due to the complex structure and unknown boundary conditions, the conventionally calculation of stator end windings has been very difficult and time consuming up to now. This paper describes the development of a full parameterized modeling tool, which allows a quick calculation of natural frequencies during the design phase of the generator. To keep the computing time low, it is important to find a way to get exact calculation results without detailed modeling of all pans. Additionally, special attention was paid to the active part, which has been replaced by spring-damper elements, and the determination of their stiffness via experimental modal analysis combined with finite element calculations.

关 键 词：Electrical machines end windings finite element method generators hydro generator power generation vibrationproblems. 

分 类 号：TM312[电气工程—电机] TP311.52[自动化与计算机技术—计算机软件与理论]