摘要
文中研究了飞机水面降落的冲击载荷。利用动网格技术控制飞机以及整个计算区域的运动,VOF方法描述气-液界面的运动变化。分析了不同降落速度、飞行速度和降落仰角下,飞机水面降落时机身压强随时间的变化规律。在三种降落条件下,机身压强值的变化规律基本一致。机身压强在入水的初始阶段达到最大值,随后迅速下降,最后保持稳定。同时,随着降落速度、飞行速度和降落仰角的增大,机身压强的最大值也随之增大。与降落速度和降落仰角相比,飞行速度对机身压强的影响程度较小。
The load of aircraft landed on water was investigated. The Moving Grid method was used to describe the movement of the computational domain, and the VOF method was employed to govern the air-water interaction throughout the domain. The load of aircraft after landing was investigated by different vertical velocities, horizontal velocities and landing elevations. The changing of load shows similar disciplinarian, they reach the peak value in the initial stage of entering water, then they decrease rapidly, finally they keep stabilization and they increase with variables increasing. Comparing to vertical velocities and landing elevations, contribution of horizontal velocities to the increasing amplitude of load is less obvious
出处
《强度与环境》
2009年第4期28-33,共6页
Structure & Environment Engineering
基金
博士点基金(N6CJ0001)
国家"863"计划(2006AA04Z401)
国家"863"计划(2007AA04Z404)
关键词
飞机水面降落
动网格
VOF方法
降落速度
飞行速度
降落仰角
aircraft landed on water
Moving Grid method
VOF method
vertical velocities
horizontal velocities
landing elevations
