A Theoretical Investigation on Experimental Model of Torsional Vibration for Turboset Shafting

机译：涡轮轴系扭振实验模型的理论研究

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This paper deduces the relationships between the natural frequency f of torsional vibration and the geometry dimension both for a simple ideal model and a real turboset shafting at first. It is found that the frequency of torsional vibration for the shafts with same shape is inversely- proportional to their length but is independency with their diameter, and the mode of torsional vibration is the same for the shafts with same shape. In addition, the distribution of the maximum torque and the maximum shearing stress along the shaft is the same for the shafts with same shape. Then, this paper studies the sensitivity of torsional natural frequencies and modes to the steam turboset shafting’s rotary inertia and stiffness based on physical data of torsional simulation experimental rig. It is showed that mechanical parameters, either rotary inertia or stiffness, may influence shafting’s torsional vibrations greatly in a certain case.

机译：本文推导了一个简单的理想模型和一个最初的涡轮组轴系的扭转振动固有频率f和几何尺寸之间的关系。结果发现，相同形状的轴的扭转振动频率与长度成反比，但与直径无关，并且相同形状的轴的扭转振动模式相同。此外，具有相同形状的轴沿轴的最大扭矩和最大剪切应力的分布是相同的。然后，本文基于扭转仿真试验台的物理数据，研究了扭转固有频率和模式对蒸汽涡轮机组轴的转动惯量和刚度的敏感性。结果表明，在某些情况下，旋转惯性或刚度等机械参数可能会极大地影响轴系的扭转振动。

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《Challenges of Power Engineering and Environment》|2007年|1-6|共6页
会议地点 Hangzhou(CN)
作者
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作者单位

Danmei Xie@School of Power and Mechanical Engineering, Wuhan University, Wuhan, 430072, China--Hengliang Zhang@School of Power and Mechanical Engineering, Wuhan University, Wuhan, 430072, China--Chuan Dong@School of Power and Mechanical Engineering, Wuhan University, Wuhan, 430072, China--Zhanhui Liu@Henan Electric Test Research Institute, Zhengzhou, 450052, China--Zhuchang Yang@Dongfang Steam Turbine Works, Deyang, 618201,China--;

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原文格式 PDF
正文语种
中图分类输配电工程、电力网及电力系统;
关键词
Steam turboset; Shafting; torsional vibration; Experimental model; Geometry dimension; Sensitivity;

机译：汽轮机组;轴系;扭转振动;实验模型;几何尺寸;灵敏度;

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A Theoretical Investigation on Experimental Model of Torsional Vibration for Turboset Shafting

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