基于局部应力的大展弦比飞机载荷设计包线研究  

Research on High Aspect Ratio Aircraft Load Design Envelops Using Structural Stress Selecting Method

作　　者：党西军 郭少楠 党祯宁 DANG Xijun;GUO Shaonan;DANG Zhenning(XAC Institute,AVIC Aircraft Co.,Ltd.,Xi’an 710089,China)

机构地区：[1]中航飞机股份有限公司西飞设计院,西安710089

出　　处：《航空工程进展》2020年第5期686-693,共8页Advances in Aeronautical Science and Engineering

摘　　要：由于技术条件和飞机研制周期限制,结构强度计算的载荷设计情况必须进行筛选,因此有必要对结构部件总载荷、简化工程梁内载荷分布的包络线进行研究。通过分析载荷包线法和结构局部应力包线筛选法的优缺点,提出结构载荷-应力包线快速筛选法,并针对一段承载翼盒进行算例验证。结果表明:该方法结合结构有限元分析技术可以快速得到结构模型局部应力,能够对结构临界危险部位进行识别、筛选,精度满足工程要求。The load design condition of structure strength computation must be selected due to the limited technique condition and aircraft development time,so it is necessary to study the envelopes of total load for structure component and simplified engineering girder load distribution.The load envelope method and structure local stress envelope selection method are introduced to propose a structure load and stress envelop fast selection method,and the method is verified with instance about a load bearing wing box.The results show that the method combining structural finite element analysis technology can fast obtain the local stress of structural model,and can recognize and select the structural critical dangerous parts,which satisfies the engineering requirement.

关 键 词：内力包线 应力 载荷设计 

分 类 号：V215.2[航空宇航科学与技术—航空宇航推进理论与工程]