A device for measuring and analyzing sound field in a high-temperature environment and its analysis method

Abstract

The invention relates to a sound field measuring and analyzing device and an analyzing method in a high temperature environment. The device consists of an acoustic catheter array, a flexible semi-infinite tube, an acoustic sensor, a data collector and a computer. The combined design of the acoustic tube and the semi-infinite tube can suppress the reflection at the end of the tube and improve the measurement accuracy. The device can collect and process sound field data, and realize sound field time domain, frequency domain and reconstruction analysis. In the process of data processing, the data at the end of the sound tube is corrected by using the sound pressure amplitude correction method based on the 1 / 3 octave spectrum to improve the measurement accuracy; the conventional beamforming sound field weighting is realized through the kurtosis weighted calculation. The structural method is optimized to obtain accurate sound pressure distribution and intensity information. The advantage is that it can perform sound field measurement in harsh environments that conventional microphones cannot directly measure, and can accurately reconstruct sound field distribution and intensity information in high temperature environments, providing data support for fatigue failure analysis of materials / components in thermoacoustic coupling environments.

Description

technical field [0001] The invention relates to a sound field measurement and analysis method in a high temperature environment. Especially the sound measurement method based on the sound tube array and the optimized sound field reconstruction analysis method in the high temperature environment. Background technique [0002] With the rapid development of aerospace technology, the aircraft has higher maneuverability and faster flight speed. Near-space vehicles have become one of the most active research topics in the international aerospace field. Near-space vehicles generally fly at speeds exceeding Mach 5 in the atmosphere, and their flight service environments are extremely complex and harsh. Its extreme surface high temperature (>1500°C), large temperature gradient (100°C / mm), high noise pulsating pressure (>170dB), and long-time (>20min) cruising are the remarkable characteristics of the flight environment of hypersonic aircraft, which have great influence on ...

AI Technical Summary

Problems solved by technology

[0004] In previous sound field measurement studies, most high-temperature measurement experiments were single-point measurements, and seldom involved two-dimensional sound field reconstruction based on array data; however, most of the studies using array data for sound source localization or reconstruction were carried out in normal temperature environments. However, there is a lack of research on sound field reconstruction in high temperature environments

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