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压气机拉杆瞬态应力与紧力分析
Transient stress and tightening force analyses of a compressor rod
- DOI:
- 作者:
- 周祚, 曾帆, 李海峰, 于海洋
ZHOU Zuo, ZENG Fan, LI Hai-feng, YU Hai-yang
- 作者单位:
- 海军潜艇学院，山东 青岛 266199
Navy Submarine Academy, Qingdao 266199, China
- 关键词:
- 热固耦合;预紧力;拉杆应力
thermal-mechanical coupling; tightening force; rod stress
- 摘要:
- 为研究压气机转子冷态启动过程中拉杆预紧力的变化规律和拉杆应力的分布规律，建立转子的1/24循环对称有限元模型。考虑拉杆凸台与拉杆孔的接触非线性、轮盘和拉杆的材料非线性以及几何非线性，对转子进行瞬态热固耦合分析，得到拉杆预紧力、拉杆应力在离心力、热载荷作用下的变化规律。结果表明：在离心力作用下，拉杆预紧力减小，拉杆的径向形变使拉杆应力较高；在热载荷作用下，拉杆和转子的温度分布、材料属性的不同使拉杆预紧力呈先增大后减小的变化规律。
In order to investigate the variation of tightening force and stress distribution of a compressor rod during the cold start-up condition, a 1/24 cyclic-symmetric FEA rotor model is established. Considering the nonlinear contact between rod shoulder and rod hole, nonlinear material and large deformation, thermal-mechanical analysis is performed, then the effect of centrifugal force and thermal load on tightening force and stress distribution is obtained. Results show that rod-tightening force will decrease and rod will be under high stress level because of the radial deformation of rod when centrifugal force is applied, as the result of different temperature distribution and material properties of rod and discs, rod-tightening force will firstly increase and then decrease under thermal load.
2023,45(2): 122-128 收稿日期：2021-09-09
DOI：10.3404/j.issn.1672-7649.2023.02.022
分类号：U263.12
作者简介：周祚(1991-),男,硕士,助教,研究方向为燃气轮机转子结构强度仿真、热应力分析、瞬态应力分析、拉杆形变分析
