Abstract
The acoustic field characteristics of high-level traveling-wave acoustic environmental simulation equipment (traveling-wave tube) are analyzed in light of the problem of insufficient high-frequency capacity when conducting high-level acoustic environmental tests. First, the acoustic field characteristics of the traveling-wave tube are simulated based on the acoustic finite element method. Through the comparative analysis of transmission loss and sound pressure distribution, the problem is located in the first section of the horn. Then, a detailed acoustic FEM model of the first section of the horn is established to calculate its transmission loss. At the same time, this part is simplified as a mathematical model, and the transfer loss equation is derived by using the transfer matrix method. The transmission loss equation indicates that the structure will have infinite amplification of the transfer loss at the periodic frequency. It is proved that the structural design of the horn leads to the insufficient high-frequency capacity of the equipment. Results of this paper can provide a basis for the design and improvement of environmental simulation equipment for high-level traveling-wave acoustic field.
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Wu, Y. et al. (2020). Theory and Simulation Analysis of Acoustic Characteristics of a High-Level Traveling-Wave Acoustic Environment Simulation Device. In: Long, S., Dhillon, B. (eds) Man–Machine–Environment System Engineering . MMESE 2019. Lecture Notes in Electrical Engineering, vol 576. Springer, Singapore. https://doi.org/10.1007/978-981-13-8779-1_66
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DOI: https://doi.org/10.1007/978-981-13-8779-1_66
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