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汽轮机扭振作用下叶片响应及应力计算

汽轮机扭振作用下叶片响应及应力计算

Response and Stress Calculation of Blades Under the Action of Shaft Torsional Vibration in Turbo-Generator Sets

Response and Stress Calculation of Blades Under the Action of Shaft Torsional Vibration in Turbo-Generator Sets

doi:
摘要:
建立了适用于汽轮发电机组轴系扭振与叶片振动耦合分析的转子-叶片耦合扭振模型,并将该模型应用于某国产600MW汽轮发电机组末级长叶片的分析计算中.基于该模型采用Riccati传递矩阵法和Newmark-β法相结合的方法得到轴系扭振故障时叶片的位移响应曲线,利用Ansys软件计算得到叶片位移-应力关系曲线,确定了叶片振动的危险截面,得到叶片危险点的应力历程,为转子和叶片的扭振疲劳寿命损耗在线分析和安全性评估奠定了基础.
Abstract:
A rotor-blade model was established for analysis of the coupled shaft torsional vibration and blade bending vibration,which was used to analyze the last stage long blades in a 600 MW turbo-generator set.Based on the model,the method combining Riccati transfer matrix algorithm with Newmark-β method was used to obtain the displacement response curve of blades when shaft torsional vibration happens.Through Ansys calculation,the displacement-stress curve of blade was acquired,while the dangerous section of blade was determined,together with the stress history obtained,which may serve as a reference for online fatigue life analysis and safety assessment of the rotor and blade.
作者 杨昆 [1] 赵鹏程 [1] 顾煜炯 [1] 聂沈斌 [2] 龚明祥 [2]
Author: YANG Kun[1] ZHAO Pengcheng[1] GU Yujiong[1] NIE Shenbin[2] GONG Mingxiang[2]
作者单位
  1. 华北电力大学国家火力发电工程技术研究所,北京,102206
  2. 中广核苏州热工研究院有限公司,江苏苏州,215000
期 刊: 动力工程学报 ISTIC EI SCI PKU CSSCI
Journal: Journal Of Chinese Society Of Power Engineering
年,卷(期) 2018, 38(3)
分类号 TK263.3
关键词: 叶片 知识脉络 扭振 知识脉络 耦合振动 知识脉络 应力 知识脉络
Keywords: blade torsional vibration coupled vibration stress
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