A method for compiling a turbine disk test spectrum based on creep-fatigue interaction

By constructing a three-dimensional workspace and a multi-objective optimization model, a creep-fatigue interactive equivalent test spectrum of the turbine disk is generated, which solves the problem of inaccurate creep damage assessment in the existing technology and realizes a reliable assessment of the turbine disk's life.

CN122389210APending Publication Date: 2026-07-14NANJING UNIV OF AERONAUTICS & ASTRONAUTICS +2
View PDF 1 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
Filing Date
2026-05-15
Publication Date
2026-07-14

AI Technical Summary

Technical Problem

Existing technologies fail to effectively consider the interaction between creep and fatigue when compiling turbine disk load spectra, especially neglecting the impact of holding time on creep damage, leading to inaccurate assessments.

Method used

A three-dimensional real workspace is constructed, and the region is divided based on the mean, amplitude and holding time. Cluster analysis and multi-objective optimization model are used to generate creep-fatigue interaction equivalent test spectrum. The load frequency is optimized by genetic algorithm to ensure damage equivalence.

Benefits of technology

It enables accurate assessment of the creep-fatigue interaction of turbine disks, provides more reliable life prediction, and is suitable for damage assessment under complex load conditions.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN122389210A_ABST
    Figure CN122389210A_ABST
Patent Text Reader

Abstract

The application discloses a turbine disc test spectrum compiling method based on creep-fatigue interaction, and relates to the technical field of load spectrum compilation of high-temperature components of an aero-engine. The method comprises the following steps: a mean value-amplitude-load duration time three-dimensional real working space is constructed, and the load cycles in the three-dimensional real working space are regionally divided; typical load grades are extracted by clustering analysis for each region; a multi-objective optimization model is constructed, and the optimal load frequency is determined by solving; based on the load grade and the optimal load frequency, the load cycles are converted into load spectrum blocks of each grade, and the load spectrum blocks of each grade are sorted and integrated to obtain a creep-fatigue interaction equivalent test spectrum. The application considers the load identification under the interaction of creep and fatigue, improves the accuracy of creep damage evaluation, and provides reliable technical support for life assessment of hot end components.
Need to check novelty before this filing date? Find Prior Art