下单翼飞机主起落架舱补强结构设计与分析
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摘要
主起落架舱(以下简称主起舱)位于主起落架所在的机身腹部翼身开口处,该区域连接结构复杂,是飞机外部载荷、应力集中、疲劳问题最为严重的区域,是机身载荷传递实现平衡的必经区域。主起舱的补强与一般机身开口补强不同,一方面要能够有效缓解开口应力集中,另一方面要参与外翼、主起落架与机身之间的传力以降低周围结构应力。补强结构设计的好坏直接影响翼身传力和主承力结构设计,通过主起舱补强结构进行力学和有限元对比,分析说明下单翼飞机主起舱补强方案。
The Main Landing Gear Bay(MLGB) lies in the belly of the fuselage wing body main landing gear opening.The structure of the area is complex,where the problem of external load,stress concentration,fatigue is the most serious,and where the body load transfer realizes the aim of regional balance.The MLGB compartment of the reinforcement is different from general body opening reinforcement.The one hand,the MLGB compartment of the reinforcement will be able to effectively alleviate the opening stress concentration,on the other hand,it will take part in the force among the main wing,landing gear and fuselage structure to reduce the surrounding stress.A good reinforcement option directly influences the wing body force and the main bearing structure design.The article based on force and finite element analysis discusses the reinforcement options of low-wing aircraft MLGB.
The Main Landing Gear Bay(MLGB) lies in the belly of the fuselage wing body main landing gear opening.The structure of the area is complex,where the problem of external load,stress concentration,fatigue is the most serious,and where the body load transfer realizes the aim of regional balance.The MLGB compartment of the reinforcement is different from general body opening reinforcement.The one hand,the MLGB compartment of the reinforcement will be able to effectively alleviate the opening stress concentration,on the other hand,it will take part in the force among the main wing,landing gear and fuselage structure to reduce the surrounding stress.A good reinforcement option directly influences the wing body force and the main bearing structure design.The article based on force and finite element analysis discusses the reinforcement options of low-wing aircraft MLGB.
引文
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[5]晋萍,聂宏.起落架着陆动态仿真分析模型及参数优化设计[J].南京航空航天大学学报,2003,35(5):490-500.
[2]陈博,刘杨,王爱军.基于有限元的飞机机翼刚度分析[J].强度与环境,2012,39(3):5-6.
[3]牛春匀.实用飞机结构工程设计[M].北京:航空工业出版社,2008:525-538.
[4]《飞机设计手册》总编委会.飞机设计手册第10册:结构设计[M].北京:航空工业出版社,2000:216-330.
[5]晋萍,聂宏.起落架着陆动态仿真分析模型及参数优化设计[J].南京航空航天大学学报,2003,35(5):490-500.