<正>研究了汽轮发电机组轴系扭振固有频率的现场测试 ,着重分析了激振方法和有关测试技术要点。试验结果表明 ,稳态不对称短路变频激振法不仅能够测得轴系低阶固有频率 ,而且能够测得一些高阶频率

This paper studies the methods of torsional vibration natural frequencies test of steam turbine generator rotor system,and introduces the excitation methods and some key techniques in the field test.The test results indicate that both lower order modes and several higher order modes can be obtained by the method of steady state unbalanced currents excitation.