飞机结构设计中载荷安全系数的工程意义  

ENGINEERING IMPLICATION OF LOAD SAFETY FACTOR IN AIRCRAFT STRUCTURE DESIGN

作　　者：程小全[1] 张纪奎[1] 郦正能[1] CHENG Xiaoquan;ZHANG Jikui;LI Zhengneng(School of Aeronautical Science and Engineering,Beihang University,Beijing 100083,China)

机构地区：[1]北京航空航天大学航空科学与工程学院,北京100083

出　　处：《力学与实践》2021年第4期599-602,共4页Mechanics in Engineering

基　　金：北京航空航天大学“凡舟”教育基金课程教学团队建设项目资助(31500002013201001)。

摘　　要：飞机结构设计课程中将安全系数作为外载荷的内容进行阐述,而材料力学中安全系数属于材料强度方面的内容,初学者很难区分两者的不同,容易对安全系数的内涵产生误解。为此,本文首先对两个安全系数的定义进行对比,分析两者内涵的差别,进而阐述飞机结构设计中载荷安全系数的工程意义,并从复合材料结构设计值及安全系数的确定方法与金属结构的对比分析,加深对载荷安全系数工程意义的理解,以期帮助初学者尽快掌握安全系数的概念。In aircraft structure design, the safety factor is described with respect to the applied load, while the safety factor in the mechanics of materials is defined with respect to the material strength. It is difficult for beginners to distinguish the difference between them and to understand the connotation of the safety factor.In this paper, two definitions of the safety factor are compared and analyzed. The engineering implication of the load safety factor in the aircraft structure design is expounded. From analysis of the design value and the determination method of the safety factor for composite material structure, which are different from those for metal structure, the engineering significance of the load safety factor is made clear, which helps beginners to master the concept of the safety factor.

关 键 词：飞机结构设计 材料力学 安全系数 外载荷 

分 类 号：V222[航空宇航科学与技术—飞行器设计]