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Study on the Indoor Acoustic Field Analysis using the Blast Wave Model
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 Title & Authors
Study on the Indoor Acoustic Field Analysis using the Blast Wave Model
Song, Kee-Hyeok; Kang, Woo-Ram; Lee, Duck-Joo; Kim, Young-Nam;
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 Abstract
A portable recoilless guided missile generates a strong back blast and impulsive noise at the nozzle when it launches. In the case of indoor operations, the hazard of the blast noise from a recoilless weapon increases due to limited indoor spaces. Also, the noise levels determine the operational feasibility of a weapon; therefore, it is important to predict the blast noise levels distribution in the indoor space in advance. In addition, computational fluid dynamics (CFD) method generally used for fluid related simulations, requires high computing cost and time to simulate the whole domains. The domain includes both blast wave region and large and various indoor space region. Therefore, an efficient method for predicting the far-field noise level within a short time should be developed. This paper describes an analysis model for predicting the indoor noise distributions by considering the shape effect of the building within a short time. A new developed blast wave model was implemented using the noise source. Additionally, noise reflections at the closed surfaces such as walls and noise transmissions at the opened surfaces such as windows and doors were considered in calculating the noise levels. The predicted noise levels were compared with the experimental data obtained from the indoor launch test to validate the reliability of program.
 Keywords
impulse noise;interior space;blast wave model;computational fluid dynamics;
 Language
Korean
 Cited by
1.
A Study on the Risk Assessment Method of Indoor-Impulsive Noise, Journal of the Korean Society of Safety, 2016, 31, 2, 90  crossref(new windwow)
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