厚薄通用四边形平板壳元在薄壁结构加筋布局优化中的应用  

Stiffener Layout Optimization of Thin-Walled Structures Through Thick/Thin Generic Quadrilateral Shell Elements

作　　者：王谦 丁晓红[1] 张横[1] WANG Qian;DING Xiaohong;ZHANG Heng(School of Mechanical Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China)

机构地区：[1]上海理工大学机械工程学院,上海200093

出　　处：《空天防御》2023年第2期55-61,共7页Air & Space Defense

基　　金：国家自然科学基金资助项目(51975380,52005377)。

摘　　要：飞行器舵面为不规则薄壁结构,内部筋板骨架与蒙皮存在较大厚度差异。针对舵面结构分析对网格灵活性的要求,利用具有旋转自由度的膜元GQ12与剪应变混合插值板元MITC4,耦合构造了一种厚薄通用、准确度高的四边形平板壳元;基于此,利用自适应成长法对飞行器舵面结构进行加筋布局优化设计,获得了清晰的内部最优骨架布局。与传统骨架布局设计对比,本优化设计使整体结构刚度提升33%,结构减重29%,同时,验证了GQ12+MITC4耦合单元的准确性、实用性,以及舵面骨架自适应成长加筋拓扑优化设计的有效性,这为飞行器舵面骨架筋板布局设计提供了一种高效的设计方法。An aircraft rudder is an irregular thin-walled structure with a huge thickness difference between its inner stiffener and skin.To meet its demand for mesh flexibility in analysis,a high-accuracy generic quadrilateral element for the thick and thin flat shell was constructed using coupling membrane element GQ12,which has rotational DOF,and the shear strain mixed interpolated plate element MITC4.Based on this analysis tool,this study has successfully obtained a clear internal optimized stiffener layout via adaptive growth method.Compared with traditional rudder internal frame design,the overall structure stiffness of the optimization result was improved by 33%and the weight was reduced by 29%.The accuracy and practicability of the GQ12+MITC4 coupling element and the effectiveness of the adaptive growth method on rudder stiffener layout topology optimization were verified,thus,providing an innovative and effective method for stiffener layout design of aircraft rudder structure.

关 键 词：飞行器舵面 有限元法 GQ12膜元 MITC4板元 拓扑优化 

分 类 号：V211.47[航空宇航科学与技术—航空宇航推进理论与工程]