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http://dx.doi.org/10.9766/KIMST.2018.21.4.413

The Parametric Study of the Design Variables on the SRS of Pyroshock Resonant Bar  

Jeon, Hyeonkyu (Department of Aerospace Engineering, Chungnam National University)
Kim, Munguk (Department of Aerospace Engineering, Chungnam National University)
Kim, Minsung (Department of Aerospace Engineering, Chungnam National University)
Kwon, Yeongmin (Department of Aerospace Engineering, Chungnam National University)
Yu, Yejin (Department of Aerospace Engineering, Chungnam National University)
Kim, In-Gul (Department of Aerospace Engineering, Chungnam National University)
Publication Information
Journal of the Korea Institute of Military Science and Technology / v.21, no.4, 2018 , pp. 413-421 More about this Journal
Abstract
The pyroshocks can cause failure of electronics devices and structures. Metal-metal impact methods are utilized to simulate mechanical pyroshock, and to adjust the knee frquency of the SRS(Shock Response Spectrum) through resonant structures. In this paper, the major parameters of pyroshock simulation device which affect the SRS were examined. Through the Hertzian contact law and the modal characteristics of the resonant bar, it was found that the SRS is affected by the length and mass of a bar and various impact conditions such as velocity and mass of impactor. The characteristics due to the geometric parameters of a resonant bar was analyzed by performing FEA and also the resonant bar was designed and fabricated. Through the pyroshock simulation test, the characteristics of SRS due to the variation of impact parameters were examined.
Keywords
Bernoulli Approach; Modal Characteristics; Pyroshock; Resonant Bar; Shock Response Spectrum;
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