摘要
水陆两栖飞机需要在水面反复起降,其着水响应特性相对陆基飞机水上迫降要求更为苛刻。文中基于LS-DYNA仿真平台建立了飞机结构和水体耦合的数值模型,采用ALE耦合算法分析了飞机着水时重心过载、机身底部压力的变化过程,同时研究了着水攻角、下沉速度及升力对着水过载特性的影响。结果表明:着水后瞬间重心过载和机身底部压力达到峰值;着水攻角、下沉速度和升力均对机体着水过载特性有较大影响。分析结果为水陆两栖飞机的结构设计提供了参考。
As amphibian is taking off and landing on water repeatedly,its characteristics of water landing response are more rigorous than ditching.Based on the need of amphibian design,a coupling model of structure and fluid was presented by using LS-DYNA software.The centrobaric overload response and pressure of plane landing were obtained by using the ALE coupling algorithm,and the influence of landing attack angle,descendent velocity,aero lift on water landing response were studied.Results show that the centrobaric overload and pressure of plane landing in water reach maximum value instantaneously,and landing attack angle,descendent velocity,aero lift have an obvious influence to amphibian water landing response.It provides future reference for the structural design of amphibian aircraft.
出处
《机械设计》
CSCD
北大核心
2013年第8期86-89,共4页
Journal of Machine Design
关键词
水陆两栖飞机
着水响应
数值分析
amphibian
water landing response
numeral simulation
作者简介
罗琳胤（1966-），男，湖南隆回人，研究员，博士研究生，研究方向：飞机结构强度设计
