ANSYS-based vibration modal analysis for high pressure and intermediate pressure rotors in a 300MW unit steam turbine

WANG Guangding; MENG Zhaojun

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ANSYS-based vibration modal analysis for high pressure and intermediate pressure rotors in a 300MW unit steam turbine

Thermal Power Generation Vol. 44, Issue 9, Pages: 105-108(2015)

更新时间：2025-09-28

- ANSYS-based vibration modal analysis for high pressure and intermediate pressure rotors in a 300MW unit steam turbine
- 作者机构：
  
  沈阳工程学院能源与动力学院
- 作者简介：
- 基金信息：
- DOI：
  CLC： TK261
- Published：2015
- 稿件说明：
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WANG Guangding, MENG Zhaojun. ANSYS-based vibration modal analysis for high pressure and intermediate pressure rotors in a 300MW unit steam turbine[J]. Thermal Power Generation, 2015, 44(9): 105-108.
DOI：

WANG Guangding, MENG Zhaojun. ANSYS-based vibration modal analysis for high pressure and intermediate pressure rotors in a 300MW unit steam turbine[J]. Thermal Power Generation, 2015, 44(9): 105-108. DOI：

摘要

针对汽轮机高、中压转子的共振问题

结合某亚临界300 MW机组汽轮机高、中压转子的结构特点

对该转子振动进行模态分析

采用数值仿真有限元软件ANSYS

计算得出该转子的前6阶固有频率及其临界转速。结果显示:汽轮机的工作转速(3 000r/min)一般不会达到转子的后3阶临界转速

因此转子在后3阶不会出现共振现象;在实际运行中

当转子工作转速经过前3阶时

应快速通过并远离此时的临界转速避免转子发生共振。

Abstract

Against the resonant problem in high pressure(HP)and intermediate pressure(IP)rotors in steam turbines

the HP-IP rotor vibration modal of a subcritical 300 MW unit steam turbine was analyzed using numerical simulation software ANSYS

on the basis of the HP-IP rotor structure features.The first 6orders' natural frequency and the critical speed of the HP-IP rotor for this 300 MW unit steam turbine are obtained and the results were compared with that of the steam turbine with normal working speed(3 000r/min).It shows that

generally

the working speed of steam turbine will not reach the last 3orders' critical speed.Therefore

the resonant problem will not occur in the last 3orders.During the practical operation

when the rotor's working speed goes through the first 3orders

it should goes quickly and gets away from the critical speed to avoid the resonant vibration.

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