Research on the Strength and Vibration Characteristics of Turbine Blades under Fluid-Thermal-Solid Conditions

FAN Xinyan; YUAN Qi; LIU Yang

doi:10.7652/xjtuxb202512013

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Research on the Strength and Vibration Characteristics of Turbine Blades under Fluid-Thermal-Solid Conditions

更新时间：2025-12-08

- Research on the Strength and Vibration Characteristics of Turbine Blades under Fluid-Thermal-Solid Conditions
- Journal of Xi'an Jiaotong University Vol. 59, Issue 12, Pages: 149-160(2025)
- 作者机构：
- 作者简介：
- 基金信息：
- DOI：10.7652/xjtuxb202512013
  CLC： TK262
- Received：04 April 2025，
  
  Published：10 December 2025
- 稿件说明：
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FAN Xinyan, YUAN Qi, LIU Yang. Research on the Strength and Vibration Characteristics of Turbine Blades under Fluid-Thermal-Solid Conditions[J]. Journal of Xi'an Jiaotong University, 2025, 59(12): 149-160.
DOI：

FAN Xinyan, YUAN Qi, LIU Yang. Research on the Strength and Vibration Characteristics of Turbine Blades under Fluid-Thermal-Solid Conditions[J]. Journal of Xi'an Jiaotong University, 2025, 59(12): 149-160. DOI： 10.7652/xjtuxb202512013.

摘要

为准确分析汽轮机叶片在多物理场下的失效问题，综合考虑了温度梯度、气动力、离心力等载荷对叶片强度和振动的影响。基于多重参考系与有限元联合仿真方法，在离心力、温度梯度和气动力单独及综合作用下，对某汽轮机第8级动、静叶片开展数值计算，进行强度和振动校核以及参数敏感性分析，获得了汽轮机叶片在流热固影响下的强度和振动特性。计算结果表明：静、动叶片的总变形分别为0.0791、1.0934 mm，最大等效应力分别为92.45、470.28 MPa，能够满足强度和振动要求；对动、静叶片进行强度计算时需考虑气动力和热应力的影响，模态分析时需考虑弹性模量随温度的变化以及离心力作用；随着转速、入口温度和入口压力的升高，动、静叶片的总变形和等效应力均增大；动叶片模态频率随着转速升高而增大，动、静叶片模态频率随着入口温度和入口压力的升高而下降。该研究可为汽轮机叶片流热固影响下强度和振动的计算校核及特性研究提供理论依据。

Abstract

When turbine blades fail in multi-physical fields

accurate analysis of the failure requires comprehensive consideration of how temperature gradient

aerodynamic force

centrifugal force and other loads affect the strength and vibration of the blades.For the purpose of this research

a joint simulation based on multiple reference systems and finite elements was implemented for numerical calculations

strength and vibration checks

and parameter sensitivity analyses regarding the 8th stage rotor and stator blades of a steam turbine under the separate and combined effects of centrifugal force

temperature gradient

and aerodynamic force to derive the strength and vibration characteristics of the turbine blades under the fluid-heat-solid conditions.According to the calculation results

the total deformation of the stator and rotor blades is 0.0791 mm and 1.0934 mm

respectively

and the maximum equivalent stress is 92.45 MPa and 470.28 MPa

respectively

which can meet the strength and vibration requirements.For strength calculation of the rotor and stator blades

the influence of aerodynamic force and thermal stress was considered. For modal analysis

the change in elastic modulus with temperature and the effect of centrifugal force was considered.An increase in the total deformation and equivalent stress of both rotor and stator blades was observed as the rotational speed

inlet temperature

and inlet pressure rose；the modal frequency of rotor blades increased with the rotational speed

while the modal frequency of both rotor and stator blades decreased as the inlet temperature and inlet pressure went up.This study may provide a theoretical basis for strength and vibration calculations

verification

and characteristic research of turbine blades under the influence of fluid-thermal-solid conditions.

关键词

Keywords

references

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