机翼缘条喷丸强化变形模拟与参数优化  

Simulation and Optimization of Shot Peening Deformation for Aircraft Wing Flange

作　　者：张炜 刘立彬[2] 夏明莉 王永军[3] 肖旭东[3] 何俊杰[3] 

机构地区：[1]中航飞机西安飞机分公司,西安710089 [2]中国人民解放军驻西飞公司军事代表室,西安710072 [3]西北工业大学机电学院,西安710072

出　　处：《航空制造技术》2016年第17期28-32,共5页Aeronautical Manufacturing Technology

摘　　要：机翼缘条是连接飞机机翼与中央翼盒的重要结构件,其制造精度要求较高。喷丸强化后,该零件在喷丸残余应力的作用下会产生弯曲变形,需要通过优化不同位置的喷丸强化参数以减小弯曲变形量。首先,在喷丸强度的许可范围内进行了喷丸强化试验,并通过X衍射测量,建立喷丸参数与喷丸残余应力场间的函数关系;其次,设计Box-Behnken试验,通过等效喷丸变形模拟方法,得到了不同喷丸参数下机翼缘条的变形量,建立了缘条变形量与喷丸参数间的函数关系,根据Box-Behnken试验分析,结合工程条件得出了一组最优的喷丸强化参数;利用该组最优喷丸参数进行缘条的变形模拟和喷丸强化试验,发现喷丸变形的模拟与试验结果均较小,从而验证了缘条零件变形模拟和喷丸参数优化的有效性。The aircraft wing flange is an important structure used to connect wing and central wing box, of which manufacturing accuracy is required to be higher. Thus, bending deformations induced by residual stress after shot peening need to be reduced through optimizing shot peening parameters at different positions of the aircraft wing flange. Firstly, shot peening experiment is carried out within the permitted scope of the shot peening intensity, and relationships between peening parameters and peening residual stress measured by X-ray diffraction are established through experimental results. Secondly, based on the Box-Behnken design, the amount of wing flange deformation by means of equivalent finite element simulation method under the condition of different peening parameters is obtained, meanwhile the relationship between the deformation and peening parameters is established. And then, according to the analysis of the Box-Behnken experiment and combining with the engineering conditions, a set of optimal shot peening parameters is obtained. Finally, when using this set of optimal shot peening parameters, the amount of deformation of wing flange simulation and experiment after shot peening are both smaller than before, thus the effectiveness of simulation and parameter optimization has been verified.

关 键 词：喷丸强化变形 残余应力 机翼缘条 有限元模拟 参数优化 

分 类 号：TG668[金属学及工艺—金属切削加工及机床]