High-temperature-condition sound field measurement and analysis device and analysis method thereof

Abstract

The invention discloses a high-temperature-condition sound field measurement and analysis device and an analysis method thereof. The device comprises a sound guide tube array, a flexible semi-infinite tube, a sound sensor, a data collector and a computer. Through the combination design of the sound guide tubes and the semi-infinite tube, the tail end reflection of the guide tube can be restrained, and the measurement accuracy can be enhanced. The device can conduct sound field data acquisition and processing, and can realize the time domain, frequency domain and reconstruction analysis of a sound field. In the data processing process, data at the tail end of the sound guide tube can be corrected by utilizing a method of correcting the sound pressure amplitude value of the one-third octave band-based sound guide tube, and the measurement accuracy can be enhanced; the optimization of a conventional beam-formed sound field reconstruction method can be realized through kurtosis weighing computation, and accurate sound pressure distribution and strength information can be obtained. The high-temperature-condition sound field measurement and analysis device and the analysis method thereof have the advantages of being capable of conducting the sound field measurement under severe environments in which the conventional microphone can not directly conduct measurement, accurately reconstructing the distribution and strength information of the sound field at a high-temperature environment, and providing a data support for the fatigue invalidation analysis of materials / members under thermal sound 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 ...

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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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