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http://dx.doi.org/10.5050/KSNVN.2009.19.2.146

Dynamic Response of Hull Mounted Cylindrical Array Sonars to Shocks  

Shin, Chang-Joo (부산대학교 대학원 기계시스템설계)
Hong, Chin-Suk (부산대학교 기계공학부)
Jeong, Weui-Bong (부산대학교 대학원 기계시스템설계)
Seo, Hee-Seon (부산대학교 기계공학부)
Publication Information
Transactions of the Korean Society for Noise and Vibration Engineering / v.19, no.2, 2009 , pp. 146-154 More about this Journal
Abstract
Dynamic response of a hull mounted sonar(HMS) to shocks transmitted through hull structures is analyzed and then the structural reliability of the sonars is evaluated. Finite element model of the hull mounted sonar is established and the transient responses to the shock is calculated using MSC.NASTRAN. According to BV043, the maximum allowable accelerations at the foundation of the sonar are converted from the shock spectra allowable for HMS. They are applied vertically and horizontally, respectively, using the large mass method. The structural reliability is evaluated by comparing the von-Mises stresses with the material yield stress. The drum for sensors shows a high reliability owing to mounts by which the shock waves from the base structure are well protected. However, the mounts between the base structure and the drum to mount sensors show a high stress intensity. The base structure also reveals a high stress intensity at the connection points to the hull.
Keywords
Hull Mounted Sonar; Cylindrical Array Sonar; Shock; Shock Response; Structural Reliability;
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  • Reference
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