naa a22 4500 51082367X CHVBK 20180411083546.0 cr unu---uuuuu 180411e20130401xx s 000 0 eng 10.1007/s12541-013-0080-4 doi (NATIONALLICENCE)springer-10.1007/s12541-013-0080-4 A study on the crashworthiness design and analysis for military helicopter [Elektronische Daten] [Jang-Wook Hur, Jae-Ho Jang] Crashworthiness model for Korean Utility Helicopter was built by employing KRASH, a kinetic analysis program, and the characteristics and performance of crashworthiness were assessed by the analysis. As a result of the analysis considering crashworthiness impact velocity of military standard, the vertical impact velocity became 0 after 0.124 second and the predicted values for the maximum acceleration of the engine and power transmission gear were 33G and 27G respectively. Cabin space height before and after the crash were 1.59 m and 1.40 m respectively; it led to 12% reduction in survival space but managed to fulfill the engineering requirement of "below 15%.” The predicted maximum displacement of crew and passenger seats were 126 mm and 188 mm respectively, fulfilling each of the acceptable standard. In addition, according to the results evaluated by Eiband Curve, passenger acceleration level was found out to be insufficient to cause a severe damage to passengers. Korean Society for Precision Engineering and Springer-Verlag Berlin Heidelberg, 2013 Crashworthiness nationallicence Vertical Impact Velocity nationallicence Maximum Acceleration nationallicence Cabin Space Height nationallicence Maximum Displacement nationallicence Eiband Curve nationallicence r : survival space reduction rate nationallicence δ s : seat displacement nationallicence a c : crew acceleration nationallicence σ : stress nationallicence ɛ : strain nationallicence t : time nationallicence a max : maximum acceleration nationallicence h : cabin space height nationallicence δ max : maximum displacement nationallicence t d : duration time nationallicence v : vertical velocity nationallicence Hur Jang-Wook Department of Intelligent Mechanical Engineering, Kumoh National Institute of Technology, 1 Yangho-dong, Kumi-si, 730-701, Kyeongbuk, South Korea aut Jang Jae-Ho Korea Aerospace Industries LTD., 55 Yongdang-ri, Sacheon-up, Sacheon-si, 664-802, Kyeongnam, South Korea aut International Journal of Precision Engineering and Manufacturing Korean Society for Precision Engineering 14/4(2013-04-01), 599-603 2234-7593 14:4<599 2013 14 12541 https://doi.org/10.1007/s12541-013-0080-4 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s12541-013-0080-4 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Hur Jang-Wook Department of Intelligent Mechanical Engineering, Kumoh National Institute of Technology, 1 Yangho-dong, Kumi-si, 730-701, Kyeongbuk, South Korea aut NATIONALLICENCE 700 1- Jang Jae-Ho Korea Aerospace Industries LTD., 55 Yongdang-ri, Sacheon-up, Sacheon-si, 664-802, Kyeongnam, South Korea aut NATIONALLICENCE 773 0- International Journal of Precision Engineering and Manufacturing Korean Society for Precision Engineering 14/4(2013-04-01), 599-603 2234-7593 14:4<599 2013 14 12541 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer