A Method for Analyzing the Vibration Environment of Sensing Part of Engine and Determining Test Load

Abstract

A method for analyzing the vibration environment of a sensing part of an engine and determining a test load, comprising: step 1, calculating and analyzing the static strength and fatigue strength of the sensing part; step 2, selecting a vibration sensor whose temperature resistance and frequency range meet the working environment of the engine , install the vibration sensor on the part of the engine that can reflect the maximum vibration response of the sensing part, and obtain the vibration load data; Step 3, analysis and statistical processing of the test load of the sensing part; Step 4, determination and synthesis of the test profile of the sensing part and simplification; step five, correct the test load in combination with the vibration environment changes of the engine in the field use process; step six, formulate the fatigue test load spectrum according to the corrected test load, select the test section of the sensing part to carry out the fatigue test, And based on the test results, the safe life of the sensing part is given to guide the design and modification of the sensing part. The invention can scientifically and reasonably determine the safe life of the product, and improve the reliability and economy of the product.

Description

technical field [0001] The invention belongs to aero-engine testing technology, in particular to a method for analyzing the vibration environment of an engine sensing part and determining a test load, and proposes a product life evaluation scheme suitable for the sensing part, thereby giving the safe life of the sensing part. Background technique [0002] The sensing part of an aero-engine is an important component for measuring parameters such as temperature and pressure at different cross-sectional positions of the engine. Since most sensing parts are directly inserted into the engine from the engine casing and work in a cantilever state, the reliability of the sensing part is particularly Important, especially the sensing part installed in the main channel of the engine, its reliability directly affects the safety of the engine test run. From the scientific research stage to the mass production of an engine, a large number of temperature and pressure test sensing parts ar...

AI Technical Summary

Problems solved by technology

From the scientific research stage to the mass production of an engine, a large number of temperature and pressure test sensing parts are required, especially in the scientific research and trial run stage, and the design and production costs of the sensing part are very high. In order to reduce the use cost of the sensing part, The sensing part must be given a reasonable service life, and none of the current various standards can be directly used in the life test of the sensing part of the aero-engine. The life of the sensing part is very conservative, far lower than similar foreign products service life

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