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Fretting fatigue damage resistance optimization method for turbine joggle joint structure

A fretting fatigue and turbine technology, used in design optimization/simulation, special data processing applications, instruments, etc., to achieve the effect of improving fretting fatigue life, improving optimization, and reducing maintenance costs

Pending Publication Date: 2020-10-30
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Since fretting is inevitable in practical application of components, and the damage of fretting fatigue is imperceptible and its consequences are extremely serious, the problem of fretting fatigue is not only universal and concealed, but also fatal

Method used

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  • Fretting fatigue damage resistance optimization method for turbine joggle joint structure
  • Fretting fatigue damage resistance optimization method for turbine joggle joint structure
  • Fretting fatigue damage resistance optimization method for turbine joggle joint structure

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Embodiment Construction

[0020] In order to make the objectives, technical solutions, and advantages of the present invention clearer, the following further describes the present invention in detail with reference to the accompanying drawings and implementation cases. It should be understood that the specific implementation cases described here are only used to explain the present invention, but not to limit the present invention.

[0021] The invention discloses a method for optimizing the anti-fretting fatigue damage of a turbine tenon joint structure. The turbine tenon joint structure includes a turbine tenon and a turbine tenon groove that are meshed with each other. The optimization method includes the following steps:

[0022] Step 1) Analyze the shape and size of the turbine tenon joint structure, and obtain the following independent parameters to establish a parameterized finite element model of the turbine tenon joint structure: the top angle wedge_angle of the turbine tenon and the turbine tenon ...

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Abstract

The invention discloses a fretting fatigue damage resistance optimization method for a turbine joggle joint structure. The turbine joggle joint structure comprises a turbine tenon and a turbine mortise which are meshed with each other. The method comprises the following steps: simplifying a fir-shaped tenon connection structure of an aero-engine turbine, and establishing a parameterized finite element model of a single-tooth joggling structure; conducting sensitivity analysis on the shape and size of the single-tooth joggle joint structure, and determining several parameters which have the largest influence on the fretting fatigue life; using the parameters as design variables, using the fretting fatigue life as a target function, and using a multi-island genetic optimization algorithm todesign the optimal size. According to the method, the fretting fatigue life of the turbine joggle joint structure can be prolonged, and reference is provided for structural design of the turbine tenonand the turbine mortise of the aero-engine.

Description

Technical field [0001] The invention relates to the field of design of aero-engine turbine tenon joint structure, in particular to a method for optimizing the anti-fretting fatigue damage of the turbine tenon joint structure. Background technique [0002] Fretting fatigue refers to the physical phenomenon that under the action of cyclic loading, there is a contact load between two surfaces in contact with each other, and a small relative sliding occurs at the same time to produce complex wear effects, which significantly reduces the fatigue life of the structure and accelerates the failure failure process . [0003] In aero-engines, up to 20% of failures are caused by failure and destruction of the tenon connection structure, and fretting fatigue is one of the main reasons for the failure and failure of the tenon connection structure. Because fretting is inevitable in the actual application of components, and the damage of fretting fatigue is not easy to detect, and its consequenc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/17G06F30/23G06F111/04G06F119/14G06F119/02
CPCG06F30/17G06F30/23G06F2111/04G06F2119/14G06F2119/02
Inventor 张宏建严小冬崔海涛温卫东
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS