CAJ | 학술논문

以某型飞机翼身结合加强框为例，利用有限元法进行其刚度性能的优化设计。首先，分析确定翼身结合框的可靠性安全载荷，建立全新的结构刚度模型，利用有限元法分析求解刚度指标。然后根据结构设计要求和限制条件，基于应力应变特性和拓扑优化分析结果，优选设计参数，提出改进模型。通过对比分析结果，表明模型改进达到了结构刚度优化设计的目的。
이모형비궤익신결합가강광위례，이용유한원법진행기강도성능적우화설계。수선，분석학정익신결합광적가고성안전재하，건립전신적결구강도모형，이용유한원법분석구해강도지표。연후근거결구설계요구화한제조건，기우응력응변특성화탁복우화분석결과，우선설계삼수，제출개진모형。통과대비분석결과，표명모형개진체도료결구강도우화설계적목적。
Based on the wing-body bulkhead structure of some aircraft, the optimization design was conducted by the finite element method. Through the analysis of a prototype wing-body combination frame, the reliability safety load was determined and the new stiffness model was established. Through finite element method of Nastran, the structure stiffness was calculated and the stress and deformation analysis was carried out. Considering the frame environmental conditions and the structural design requirements, based on the stress and deformation results and topology optimization analysis results, some important structural design parameters were chosen. Based on the new design parameters, a new optimal model was created. Through comparison between the old model and the new one, it is demonstrated our aim of stiffness optimization is accomplished.