Experimental device for service reliability of composite blades under shock, vibration and high temperature excitation

Abstract

A device for testing operational reliability of composite blade subjected to impact, vibration, and high-temperature excitation comprising a power supply module, a measurement module, an angle-adjustable impact module (1), a holding module (2), a thermal environment module (3), a projectile recovery module (4), a basic excitation module (5), and a machine body module (6). The holding module (2) is provided in the thermal environment module (3), and is used to hold and fix a blade specimen under test. The angle-adjustable impact module (1) is used to launch a projectile to impact the blade specimen. The power supply module provides power to the angle-adjustable impact module (1). The projectile recovery module (4) is disposed in the thermal environment module (3), and is located behind the holding module (2) so as to recover projectiles. The thermal environment module (3) is provided on the machine body module (6), and provides an adjustable high-temperature test environment. The basic excitation module (5) is provided on the machine body module (6), and is used to provide a single-degree-of-freedom vibration to the holding module (2). The measurement module is used to measure a vibration amplitude, a trajectory of the projectile, and impact force. The device simulates an actual operating environment of a composite blade, and provides realistic and reliable test data of impact tests.

Description

technical field [0001] The invention belongs to the field of impact dynamics, and relates to an experimental device for service reliability of composite blades under the excitation of impact, vibration and high temperature. Background technique [0002] With the rapid progress and development of aerospace technology, the demand for high-performance aerospace materials has gradually increased. For a long time, the research on materials related to high-speed machinery such as aircraft has often focused on the static or low-speed characteristics of materials, which gradually exposed some problems. , and cause some serious consequences. For example, many aircraft bird strikes first appeared in the United States at the end of the last century. With the passage of time and the rapid development of global air traffic, such events have attracted more and more attention from relevant scholars. As a result, the theory of shock dynamics has begun to develop rapidly, and shock dynamic ...

AI Technical Summary

Problems solved by technology

Although the above two patents considered the influence of the temperature of the external environment, they did not consider the mechanical influence during the working process of the machine. For example, under the influence of the manufacturing process or the external environment, the turbine blades will inevitably vibrate during operation. This should be one of the factors to be considered in the impact test

[0006] Patent CN201710896598.0 uses a light gas gun as the impact power source, and the mechanical structure can be used to load the sample with preset axial pressure and preset impact force to simulate a variety of mechanical environments, but the patent does not affect the thermal environment of the sample. Without taking it into account, in fact, the aerodynamic and thermal environment faced by most steam turbine blades and other components in the working state will have a significant impact on the performance of the material

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