CN-122021169-A - Electromagnetic coupling processing parameter accurate setting method for improving fatigue performance of gas turbine blade

CN122021169ACN 122021169 ACN122021169 ACN 122021169ACN-122021169-A

Abstract

The invention provides a precise setting method of electromagnetic coupling processing parameters for improving the fatigue performance of a gas turbine blade, which identifies the fatigue danger area of the blade structure through finite element analysis, and preliminarily applying optimal electromagnetic coupling processing parameters corresponding to the blade materials to be processed according to literature data, and obtaining the actual electromagnetic field strength at the fatigue dangerous area of the blade structure. And repeatedly adjusting the input electromagnetic field parameters of the electromagnetic field simulation model to realize matching of the electromagnetic field intensity of the dangerous area with the optimal electric field intensity and the magnetic field intensity determined in literature data. After that, an electromagnetic coupling treatment experiment was performed. In the electromagnetic coupling processing equipment, input parameters after finite element simulation optimization are set to process the blade, so that the dangerous area is ensured to accurately obtain the optimal electromagnetic field effect. And evaluating the fatigue performance improving effect of the blade after electromagnetic coupling treatment through a fatigue test.

Inventors

ZHANG LIANG
LI DONGMING
YU HAITAO
WANG HUIJIE
XU NING
MAO DONGYAN
YU JINGLEI

Assignees

中国船舶集团有限公司第七〇三研究所

Dates

Publication Date: 20260512
Application Date: 20260202

Claims (10)

1. The electromagnetic coupling processing parameter accurate setting method for improving the fatigue performance of the gas turbine blade is characterized by comprising the following steps of: s1, determining optimal electromagnetic coupling processing parameters of a target blade material; S2, establishing a three-dimensional model of the blade part; s3, identifying fatigue danger areas of the blades; S4, simulating electromagnetic field distribution in the electromagnetic coupling treatment process; s5, adjusting input electromagnetic field parameters of the electromagnetic field simulation model, realizing that the electromagnetic field intensity of the vibration stress dangerous area of the blade structure is matched with the optimal electric field intensity and the magnetic field intensity determined in the S1, and recording the finally optimized input parameters; s6, performing an electromagnetic coupling treatment experiment; and S7, performance verification and feedback optimization, wherein fatigue performance improvement effects of the electromagnetic coupling treated blade are evaluated through fatigue test.
2. The method for precisely setting the electromagnetic coupling processing parameters for improving the fatigue performance of the gas turbine blade according to claim 1 is characterized in that in S1, the optimal electromagnetic coupling processing parameters corresponding to the blade material to be processed are determined by referring to data, and if no data are disclosed, the optimal electromagnetic coupling parameters for improving the fatigue performance of the material are obtained by carrying out electromagnetic coupling processing and fatigue test on a standard sample of the material.
3. The method for precisely setting the electromagnetic coupling processing parameters for improving the fatigue performance of the gas turbine blade according to claim 1, wherein the step S2 is characterized in that a three-dimensional solid model is built based on the geometric dimension and the structural characteristics of the actual blade part, and basic data is provided for subsequent finite element simulation analysis.
4. The method for precisely setting the electromagnetic coupling processing parameters for improving the fatigue performance of the gas turbine blade according to claim 1, wherein the step S3 is characterized in that the position where stress concentration or fatigue crack initiation is most easy, namely the dangerous area of the blade, is determined by utilizing finite element simulation analysis software.
5. The method for precisely setting the electromagnetic coupling processing parameters for improving the fatigue performance of the gas turbine blade according to claim 4, wherein the fatigue dangerous area of the blade is identified, a selected specific area is designed for the electromagnetic coupling parameters, meanwhile, the identification of the vibration stress dangerous area is carried out aiming at multi-order mode vibration, and the electromagnetic coupling parameters can be suitable for various blade modes.
6. The method for precisely setting the electromagnetic coupling processing parameters for improving the fatigue performance of the blade of the gas turbine according to claim 1, wherein in the step S4, an electromagnetic field simulation model is established through multi-physical field simulation analysis software, the electromagnetic field distribution condition of the blade under the actual electromagnetic coupling processing condition is simulated, and the actual electromagnetic field strength of the blade structure at the vibration stress dangerous area is obtained.
7. The method for precisely setting the electromagnetic coupling processing parameters for improving the fatigue performance of the gas turbine blade according to claim 6, wherein the steps S4 and S5 are used for carrying out iterative design work of electromagnetic parameters, the electric field and magnetic field characteristic parameters of the vibration stress dangerous area of the blade structure are selected as targets, and finally the iteration is carried out until the electric field and magnetic field parameters obtained in the step S1 are optimal targets.
8. The method for precisely setting the electromagnetic coupling processing parameters for improving the fatigue performance of the blade of the gas turbine according to claim 1, wherein in the step S6, the input parameters subjected to S5 simulation optimization are set in electromagnetic coupling processing equipment to process the blade, so that the condition that the vibration stress dangerous area of the blade precisely obtains the optimal electromagnetic field effect is ensured.
9. The method for precisely setting electromagnetic coupling treatment parameters for improving fatigue performance of a gas turbine blade according to claim 1, wherein the application and verification of the process are performed by the special tool for electromagnetic coupling treatment experiment setting in S6.
10. The method for precisely setting the electromagnetic coupling processing parameters for improving the fatigue performance of the gas turbine blade according to claim 1, wherein the step S7 is characterized in that the test is carried out through a fatigue test, the test comparison is carried out according to the relevant fatigue test standard, and the number of effective test subsamples of each test is not less than 3.

Description

Electromagnetic coupling processing parameter accurate setting method for improving fatigue performance of gas turbine blade Technical Field The invention belongs to the technical field of blade structure reliability optimization, and particularly relates to an electromagnetic coupling processing parameter accurate setting method for improving fatigue performance of a gas turbine blade. Background The compressor blade is one of key components in the gas turbine, and has extremely complex working environment, severe stress state, long-term bearing of high-speed airflow impact and periodical centrifugal stress and pneumatic load. Under such high stress alternating conditions, microcracks are easily generated inside the blade material and gradually spread, eventually leading to fatigue failure. The fatigue performance of the compressor blade is directly related to the operation safety and service life of the gas turbine, so that the improvement of the fatigue resistance of the blade has important engineering significance. Currently, main methods for improving fatigue performance of blades include optimizing material composition, improving heat treatment process, surface strengthening treatment, and the like. However, these conventional methods have problems of long treatment period, high cost, limited improvement effect, and the like. The electromagnetic coupling treatment technology is a novel modification technology which can induce an energy field coupling effect in the material by simultaneously acting an electric field and a magnetic field on the metal material, promote dislocation movement and tissue reconstruction, optimize internal residual stress distribution and help to improve the fatigue strength and the service life of the material. However, when the electromagnetic coupling treatment technique is applied to a blade, there is a key problem in that the distribution of the electromagnetic field on the blade is not uniform. Due to the complex geometry of the blade, the applied external electromagnetic field has a non-uniform distribution on the blade. This results in significant differences in the electromagnetic field strength in different regions of the blade. The current electromagnetic coupling treatment method generally determines optimal electric field intensity and magnetic field intensity parameters corresponding to materials according to literature data or experimental experience, and processes the blades. However, these set electromagnetic field strengths reflect only the output strength of the electromagnetic coupling device, not the actual electromagnetic field strength at the blade fatigue hazard zone (i.e. the location where the crack is most prone to initiation and propagation). The actual electromagnetic field intensity in the dangerous area is different from the set optimal value, so that the fatigue performance of the blade after electromagnetic coupling treatment cannot be optimized. Namely, the current electromagnetic coupling treatment method lacks of accurate targeted regulation and control on the fatigue performance of the blade, can not realize targeted strengthening and performance optimization, and can not ensure the fatigue performance stability of the blade after electromagnetic coupling treatment. Disclosure of Invention The invention aims to provide an electromagnetic coupling processing parameter accurate setting method for improving the fatigue performance of a gas turbine blade, so as to solve the problem that the electromagnetic coupling processing parameter accurate target setting cannot be realized aiming at the blade in the prior art. An electromagnetic coupling processing parameter accurate setting method for improving fatigue performance of a gas turbine blade comprises the following steps: s1, determining optimal electromagnetic coupling processing parameters of a target blade material; S2, establishing a three-dimensional model of the blade part; s3, identifying fatigue danger areas of the blades; S4, simulating electromagnetic field distribution in the electromagnetic coupling treatment process; s5, adjusting input electromagnetic field parameters of the electromagnetic field simulation model, realizing that the electromagnetic field intensity of the vibration stress dangerous area of the blade structure is matched with the optimal electric field intensity and the magnetic field intensity determined in the S1, and recording the finally optimized input parameters; s6, performing an electromagnetic coupling treatment experiment; and S7, performance verification and feedback optimization, wherein fatigue performance improvement effects of the electromagnetic coupling treated blade are evaluated through fatigue test. Further, in the step S1, the optimal electromagnetic coupling processing parameters corresponding to the blade materials to be processed are determined through reference data, and if no data are disclosed, the optimal electromagnetic coupling paramet