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Impact test system and test piece fixing device thereof

A fixed device and impact test technology, which is applied in the direction of impact test, measuring device, machine/structural component test, etc., can solve the problems of unrealistic, high cost of rotating fan blade bird strike test, scarcity of test equipment, etc., to improve the real degree of effect

Pending Publication Date: 2022-07-19
AECC COMML AIRCRAFT ENGINE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, it is not accurate enough to replace the bird strike test of rotating fan blades with the bird strike test of stationary fan blades
[0003] However, the high cost of bird strike tests on rotating fan blades and the scarcity of test equipment make it impractical to conduct such tests in the early stages of blade design

Method used

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  • Impact test system and test piece fixing device thereof
  • Impact test system and test piece fixing device thereof
  • Impact test system and test piece fixing device thereof

Examples

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Embodiment Construction

[0035] The following discloses a variety of different implementations or examples for implementing the described subject technical solutions. In order to simplify the disclosure, specific examples of various elements and arrangements are described below, which are, of course, only examples and are not intended to limit the scope of protection of the present application. For example, where a first feature described later in the specification is formed on or above a second feature, it may include embodiments in which the first and second features are formed in a direct relationship, and may also include those formed between the first and second features. Implementation of additional features so that there may be no direct connection between the first and second features. Additionally, reference numerals and / or letters may be repeated in various instances throughout these disclosures. This repetition is for brevity and clarity and does not in itself represent a relationship betw...

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Abstract

One purpose of the invention is to provide the test piece fixing device which can apply a preload to a test piece while fixing the test piece in an impact test. Another purpose of the invention is to provide an impact test system which adopts the test piece fixing device to fix the test piece. In order to achieve the purpose, the test piece fixing device comprises a pair of fixing arms and at least one adjusting unit. The two ends of the test piece are respectively fixed by the pair of fixing arms, the adjusting unit is arranged between the pair of fixing arms and is respectively connected with the pair of fixing arms in an assembling state, and the length of the adjusting unit along the length direction of the test piece is adjustable. Wherein the length of the adjusting unit is adjusted, so that the pair of fixed arms has a mutually separated movement trend, and a preload is applied to the test piece through the fixed arms.

Description

technical field [0001] The invention relates to an impact test system, in particular to a test piece fixing device in the impact test system. Background technique [0002] One of the most severe working loads of aero-engine fan blades is the shock load of different masses of birds and flocks of birds ingested by the engine. When the bird body hits the blade, the blade is in a state of high-speed rotation and has a great centrifugal force. Therefore, the load on the blade is the superposition of the bird strike load and the centrifugal force load. Furthermore, the centrifugal force experienced by each point on the rotating blade is different. With and without the superimposed effect of centrifugal force, the deformation and failure characteristics of the blade during bird strike will be quite different, because the blade in the rotating state not only has different force states, but also has different blade stiffness. Therefore, it is not accurate enough to replace the bir...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M7/08
CPCG01M7/08
Inventor 胡寿丰黄天麟王祯鑫孔维夷
Owner AECC COMML AIRCRAFT ENGINE CO LTD
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