Design method of vibration reliability of turbine leaf disc structure

A technology for turbine blisks and structural vibrations, applied in computing, special data processing applications, instruments, etc., can solve problems such as inability to quantify structural resonance, failure to ensure that turbine blisks avoid resonance, and failure to consider material dispersion, etc., to achieve turbine The effect of blisk structure optimization

Active Publication Date: 2016-03-30
BEIHANG UNIV
View PDF2 Cites 15 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, since the dispersion of materials, geometry, and rotational speed is not considered in the structural design process, the risk of s

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Design method of vibration reliability of turbine leaf disc structure
  • Design method of vibration reliability of turbine leaf disc structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0017] The technical solution of the vibration reliability design method of the turbine blade disc structure of the present invention will be further explained in conjunction with the accompanying drawings.

[0018] Considering the dispersibility of factors such as load, material and geometry, combined with the vibration reliability criterion of the turbine blade disc structure, the turbine blade disc structure vibration reliability design method provided by the present invention, the flow is shown in figure 2 .

[0019] (1) Initial plan design: first carry out the initial plan design, determine the preliminary structure according to the requirements of strength and aerodynamics, and make the resonance speed not fall near the engine design working speed or the engine stays at the resonance speed for a short time; calculate and determine The weight of the initial plan provides the initial weight for subsequent steps.

[0020] (2) Deterministic detailed design: Obtain the material pro...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a design method of the vibration reliability of a turbine leaf disc structure. The design method comprises the following steps: designing an initial scheme, determining the geometrical shape of the structure, and calculating weight; drawing a Campbell drawing, and taking a deterministic avoidance resonance margin as an optimization constraint condition; analyzing geometries, materials and the like which affect the turbine leaf disc structure, obtaining the rotation speed spectrum of an engine through the original flight parameter record and the load spectrum analysis of the engine, and obtaining the reliability degree of the avoidance resonance margin given by a deterministic design criteria; aiming at a structure vibration probability criteria to evaluate a vibration reliability analysis result, and returning to design support if a structure reliability result does not meet requirements; analyzing each dangerous mode of vibration, carrying out combined risk evaluation on all modes of vibration, and calculating the turbine leaf disc structure to meet the reliability of the given avoidance resonance margin; and judging whether the reliability meets the requirements of each technical index or not, transferring into the design support if the reliability does not meet the requirements of each technical index, and revising dimensions or materials.

Description

Technical field [0001] The present invention is a reliable design method aiming at structural vibration of aero engine turbine blade discs. It is a design method that can consider the dispersion of factors such as material, geometry, load, etc., and belongs to the technical field of aerospace engines. Background technique [0002] The aero engine is an extreme product that works under complex loads / environments such as high temperature, high pressure, and high speed. The improvement of engine performance and safety indicators requires the engine to be light in weight, long life, and high reliability (for example, safe flight Engine structural parts require low damage probability, up to 10 -5 -10 -7 Times / flight hours). Blade vibration fatigue damage failure in aero-engines is a common and frequent failure, and its failure rate often accounts for 30% to 40% of the fatigue failures of engine parts. At present, the vibration problem is still one of the main problems that plague the...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): G06F17/50
CPCG06F30/13
Inventor 王荣桥胡殿印刘华伟樊江申秀丽
Owner BEIHANG UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap