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原文传递 Rotorcraft Ditchings and Water-Related Impacts that Occurred from 1982 - 1989. Phase 2.

题名：	Rotorcraft Ditchings and Water-Related Impacts that Occurred from 1982 - 1989. Phase 2.
作者：	Bark, Lindley W.;Muller, Mark;
关键词：	DITCHING, HELICOPTERS, ABSORPTION, ACCELERATION, ACCIDENTS, CRASHES, AIRCRAFT, DETERMINATION, DOCUMENTS, DROWNING, ENERGY, FAILURE, FLOTATION, HAZARDS, IDENTIFICATION, IMPACT, WOUNDS AND INJURIES, INTERACTIONS, PHASE, SCENARIOS, STRUCTURES, WATER.
摘要：	This report documents Phase II of a two-phase effort to examine rotorcraft ditchings and water-related impacts for rotorcraft, that occurred between the years 1982 through 1989. The main tasks performed for this phase of the investigation were assessment of the effects of structure on occupant injury, determination of the specific modes of structural failure, identification of the potential means to alleviate injury, and evaluation of available analytical methods for modeling rotorcraft water impacts. The Phase II analysis examined specific aspects of the Phase I data for accidents that fulfilled the criteria for the three impact scenarios. The main impact injuries were from flailing and excessive acceleration and resulted from occupant interaction with the rotorcraft interior and insufficient energy absorption. Drowning and exposure were found to be the main post-impact hazards and other post-impact injuries were minor in severity. Structural failures of the rotorcraft are identified and discussed as they affected occupant injury. The performance and adequacy of rotorcraft flotation equipment is discussed. Means of alleviating occupant injury in rotorcraft water impacts are identified and discussed. An analytical method for modeling the water impact of a rotorcraft is evaluated. Rotorcraft ditching, Injury alleviation, Rotorcraft water impact delethalization, Water crash environment structural failure, Analytical methods, Aircraft flotation
总页数：	43
报告类型：	科技报告