Fatigue life reliability evaluation method for slide rail in wheel-rail contact

A fatigue life and reliability technology, applied in the field of material science and engineering, can solve the problems of large elastic deformation, many parts, complex shape of aircraft flap retractable mechanism, etc., to improve accuracy, improve accuracy and reliability degree of effect

Pending Publication Date: 2020-04-24
NORTHWESTERN POLYTECHNICAL UNIV
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Problems solved by technology

[0003] In related technologies, a simple rigid body model is established for the aircraft flap retractable mechanism, and kinematics simulation analysis is carried out. However, due to the complex shape of the aircraft flap retractable mechanism, many parts, large motion stroke and large elastic deformation during motion and other characteristics make it difficult to accurately analyze the reliability of the fatigue life between the wheel and rail in the actual flap mechanism by the method based on simplified rigid body modeling

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  • Fatigue life reliability evaluation method for slide rail in wheel-rail contact
  • Fatigue life reliability evaluation method for slide rail in wheel-rail contact
  • Fatigue life reliability evaluation method for slide rail in wheel-rail contact

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[0035]Example embodiments will now be described more fully with reference to the standard drawings. Example embodiments may, however, be embodied in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete and will fully convey the concept of example embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided in order to give a thorough understanding of embodiments of the present disclosure. However, those skilled in the art will appreciate that the technical solutions of the present disclosure may be practiced without one or more of the specific details being omitted, or other methods, components, devices, steps, etc. may be adopted. In other instances, well-known technical solutions hav...

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Abstract

The invention provides a fatigue life reliability evaluation method for a slide rail in wheel-rail contact, and relates to the technical field of material science and engineering. The method comprisesthe following steps: establishing a reliability analysis model of the wheel-rail mechanism fatigue life; performing dynamic analogue simulation on the reliability analysis model under a preset simulation condition to obtain contact stress between wheel rails; determining a target fatigue life and a slide rail dangerous section corresponding to the target fatigue life according to the material parameters and the contact stress; performing dynamic analogue simulation on the reliability analysis model under different simulation conditions to obtain a fatigue life sample corresponding to the dangerous section of the slide rail; fitting the fatigue life sample according to a preset fitting method to obtain a reliability evaluation model; and evaluating the reliability of the slide rail in wheel-rail contact according to the reliability evaluation model. The fatigue life reliability evaluation method of the sliding rail can improve the accuracy of fatigue life evaluation of the sliding rail, and has practicability and theoretical guidance.

Description

technical field [0001] The present disclosure relates to the field of material science and engineering technology, in particular to a fatigue life reliability evaluation method of a slide rail in wheel-rail contact. Background technique [0002] Fatigue contact is a phenomenon in which the contact surface of a machine part is under the long-term action of alternating contact stress, and the fatigue damage on the material surface causes partial metal peeling in a local area, resulting in the failure of the structural part. For example, in key components such as aircraft and engines, fatigue wear is the biggest threat to safe service. Among them, the fatigue wear of the pulley and slide rail mechanism will lead to the blockage of the pulley and slide rail mechanism, the loss of motion accuracy, the reduction of strength and the loss of working ability, etc. Therefore, the reliability of the fatigue life of the slide rail in the wheel-rail contact can be accurately evaluated, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/20G06F119/02G06F119/14
Inventor 王攀岳珠峰张政李海和刘付超赵浩东周长聪
Owner NORTHWESTERN POLYTECHNICAL UNIV
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