353 航空機用座席の落下衝撃試験における積層減速材の形状設計

概要

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National agency for security of aircraft such as Federal Aviation Administration (FAA) and Ministry of Land, Infrastructure, Transport and Tourism (MLIT) of Japan, establishes regulations which demand to conduct a dynamic test for safety of aircraft seats under a certain acceleration-time history. And a drop impact test is one of the ways to conduct the test. In this test, a test object dropped from a drop tower impacts decelerator which is piled up honeycomb sandwich panels. For realizing the desired "acceleration-time" history accurately, the decelerator design method is needed. In this research, quasi-static compression test of paper honeycomb sandwich panels was conducted to examine the "displacement-load" curve and energy absorption. The layup configuration of decelerators was designed by two kinds of approaches: (i) a method without considering the dynamic effect of paper honeycomb sandwich panel, and (ii) a method with considering the dynamic effect of the panel based on Harrigan's shock theory. In the second approach, the "acceleration-time" history of the designed decelerator was calculated by Harrigan's shock theory and compared with the required "acceleration-time" history. Finally, these approaches were compared with the design methods suggested by shoji et al. which uses dynamic energy absorption of honeycomb panels.
一般社団法人日本機械学会の論文
2011-09-05