Clamp fatigue vibration test method and system

Abstract

The invention discloses a clamp fatigue vibration test method and system. The clamp fatigue vibration test method comprises the following steps of: 1 making a mandrel corresponding to a clamp to be tested; 2, fixedly installing the clamp to be tested on a mandrel, corresponding to the clamp to be tested, on a vibration test platform; 3 providing preset acceleration and a vibration sine wave simulating the engine vibration frequency for the clamp to be tested within a first preset test time; 4, repeating the step 3 so as to obtain the limit formant and the limit vibration frequency of the clamp to be tested; 5, within a second preset test time, providing limit acceleration and the limit vibration frequency in the step 4 for the clamp to be tested so as to determine the failure life of the clamp to be tested. The clamp fatigue vibration test method detects the service life of the clamp by means of the limit vibration frequency of the clamp and is specially used for testing the failure life of the clamp.

Description

technical field [0001] The invention relates to the technical field of aero-engine testing, in particular to a clamp fatigue vibration test method and a clamp fatigue vibration test system. Background technique [0002] The layout space of the external pipeline system of the aero-engine is strictly limited, the pipelines are stacked and staggered, and the shape is complex. During the use of the engine, there are failures such as fracture, oil leakage, and oil leakage. Among them, pipeline vibration is often an important reason and inducing factor for pipeline fracture. It is an urgent task to be solved in the engineering field. [0003] Aeroengine clamps are mainly used to fix and install engine pipelines, cables, etc., which can reduce the exciting force generated by the pipeline system under the condition of foundation vibration and pressure pulsation, and prevent the pipeline system from being forced to vibrate and cause pipeline rupture and damage. Therefore, whether t...

AI Technical Summary

Problems solved by technology

The vibration characteristics of the clamp can be obtained by this test method, but the relative fatigue strength of the clamp cannot be measured, that is, the fatigue life of the clamp cannot be estimated

In addition, the test load spectrum specified in HB5830.5 is a general load spectrum, which is suitable for vibration tests including various types of aircraft and various accessories on the aircraft. It covers a wide range and is less targeted than clamps.

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