大型民机水上迫降载荷数值仿真分析  

Numerical simulation analysis of water crash landing load of large Civil aircraft

作　　者：顾伟彬[1] Gu Weibin(Shanghai Aircraft Design and Research Institute, Shanghai, 201210, China)

机构地区：[1]上海飞机设计研究院,上海201210

出　　处：《机械设计与制造工程》2022年第2期61-65,共5页Machine Design and Manufacturing Engineering

摘　　要：采用MSC.Dytran建立了大型客机水上迫降流固耦合仿真模型,研究了典型参数下飞机运动姿态的变化规律,分析了水上迫降过程中机身、发动机和平尾上水载荷的分布规律。研究发现,大型客机水上迫降过程主要分为初始低头、吸力抬头和后继低头3个阶段。后机身水载荷大、冲击次数多,是机体结构中受载最严重的部位。平尾上水载荷峰值出现在吸力抬头阶段和后继低头阶段前期,而发动机上水载荷峰值出现在后继低头阶段后期。A fluid-structure coupling simulation model is established by using MSC.Dytran to study the variation law of aircraft motion attitude under typical parameters,and analyze the distribution law of water load on fuselage,engine and empennage during water crash landing.It is found that the water landing process of large passenger aircraft can be divided into three stages:initial bow,suction pitching up and subsequent pitching down.The rear fuselage is the most serious part of the airframe with large water load and many times of impact.The peak of water load on the horizontal tail appeares in the early stage of suction pitching up and subsequent pitching down stage,while the peak of water load on the engine appeares in the late stage of subsequent pitching down stage.

关 键 词：大型客机 水上迫降 流固耦合 压力分布 

分 类 号：V215.1[航空宇航科学与技术—航空宇航推进理论与工程]