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Calibration system and calibration method for blade vibration stress distribution

A technology of vibration stress and calibration system, which is applied in vibration testing, machine gear/transmission mechanism testing, measuring devices, etc., can solve the problems that the relative relationship of vibration stress is difficult to be effectively determined, achieve good vibration excitation effect, widely popularize and apply value, The effect of convenient adjustment of the excitation position

Active Publication Date: 2016-08-17
CHINA AVIATION POWER MACHINE INST
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The invention provides a blade vibration stress distribution calibration system and method to solve the technical problem that it is difficult to effectively determine the relative relationship between the position of the maximum stress point and other positions and the vibration stress at the maximum stress point in the existing blade vibration analysis

Method used

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  • Calibration system and calibration method for blade vibration stress distribution
  • Calibration system and calibration method for blade vibration stress distribution
  • Calibration system and calibration method for blade vibration stress distribution

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Embodiment Construction

[0047] It should be noted that the embodiments in the application and the features in the embodiments can be combined with each other if there is no conflict. Hereinafter, the present invention will be described in detail with reference to the drawings and in conjunction with the embodiments.

[0048] A preferred embodiment of the present invention provides a blade vibration stress distribution calibration system, which is used to perform vibration stress distribution calibration using an aero engine blade as a test piece to be tested. The calibration system of this embodiment includes:

[0049] Blade fixing device for clamping and fixing the test piece to be tested;

[0050] The signal excitation device is used to excite the test piece under test to resonate at a preset resonance frequency by means of acoustic wave excitation;

[0051] The signal detection device is used to pick up the vibration strain at different positions of the test piece to be tested and perform data processing ...

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Abstract

The invention discloses a calibration system and a calibration method for blade vibration stress distribution. The calibration system comprises a blade fixing device, a signal exciting device and a signal detecting device, wherein the blade fixing device is used for clamping and fixing a to-be-detected test piece; the signal exciting device is used for exciting resonance of the to-be-detected test piece in a sound wave excitation mode according to preset resonance frequency; the signal detecting device is used for picking up vibration strain in different positions of the to-be-detected test piece and carrying out data processing, thus obtaining the vibration stress distribution under corresponding resonance frequency. According to the calibration system and the calibration method for the blade vibration stress distribution, disclosed by the invention, the to-be-detected test piece is clamped by the blade fixing device and is excited by the signal exciting device, the vibration strain in the different positions of the to-be-detected test piece can be picked up by the signal detecting device, the vibration stress distribution under the corresponding resonance frequency is obtained by the signal detecting device, and vibration stress calibration is scientific and effective; sound wave excitation is used as a non-contact type excitation mode, so that the operation is simple, regulation of an excitation position is convenient, the excitation frequency range is wide, the excitation effect is good, and the calibration system is suitable for vibration stress distribution calibration of a blade of an aviation engine.

Description

Technical field [0001] The invention relates to the field of aeroengine blade detection, in particular, to a system and method for calibrating blade vibration stress distribution. Background technique [0002] The fatigue fracture failure of aero-engine blades is one of the main causes of aero-engine accidents. According to statistics, any aero-engine has experienced blade fatigue fracture. Therefore, mastering the vibration characteristics and fatigue life of blades is of great significance to the safe operation of aero-engines. After the blade fracture failure, to find out the specific cause of its fracture failure, it is usually necessary to know the fatigue limit that the blade can withstand, the fatigue life of the blade under a given vibration stress, and the actual vibration stress level of the blade during the aero engine test run. Further, it is necessary to perform vibration fatigue test and vibration stress test on the blade. During the blade vibration fatigue test, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M7/02G01M13/02
CPCG01M7/02G01M13/028
Inventor 边杰
Owner CHINA AVIATION POWER MACHINE INST
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