摘要
航空发动机机匣为加筋肋薄壁壳体结构,加筋肋形状和位置的优化可以起到抑制共振、提高结构强度的作用。通过有限元软件对加筋肋薄壁机匣模型的振动特性和强度特性进行计算分析,并进行模态试验验证。采用响应面法分别以振动特性和强度特性为目标对加筋肋位置及形式进行单目标优化设计,并在此基础上进行了综合优化设计,最后通过模态试验和有限元计算,验证了优化结果的准确性。分析表明,在保证加筋肋截面面积不变的情况下,单目标优化设计在不考虑其他影响因素的条件下能使薄壁加筋肋机匣减振效果或结构强度明显提高,综合优化设计能按照设计要求使薄壁加筋肋机匣的减振效果和强度同时达到要求。
The cylindrical shell stiffened rib structure is widely used for aero engine casing structure. Shape and position optimization of stiffened ribs can also inhibit vibration and improve strength of the structure.The vibration and strength characteristics of a thin-walled casing are analyzed by the finite element method.A set of modal experiments are conducted on a thin-walled casing toverify the result of calculation. The response surface method（RSM） is used for the optimal design of stiffened rib’s position and form. The goal is to inhibit vibration and improve strength of the thin-walled casing. The response surface method（RSM） is used for the comprehensive optimal design. Finally, theaccuracy of optimization results areverified by the modal experiments and finite elementmethod. It shows that separate optimization resultscan reduce vibrationand or improve strength of a thin-walled casing structure significantly and comprehensiveoptimization results can make the two aspects of thin-walled casing structure to achieve the design goal.
作者
艾延廷
王亮
田晶
赵金明
AI Yan-ting;WANG Liang;TIAN Jing;ZHAO Jin-ming(Liaoning Key Laboratory of Advanced Measurement and Test Technology for Aircraft Propulsion System,Shenyang Aerospace University,Liaoning Shenyang 110136,China;China Southern Airlines Company Limited Shenyang Aircraft Maintenance Overhaul Base,Liaoning Shenyang 110169,China)
出处
《机械设计与制造》
北大核心
2018年第12期214-218,共5页
Machinery Design & Manufacture
基金
新型负错位密封抑制气流激振机理与结构优化研究(11302133)
关键词
加筋肋
薄壁机匣
响应面法
综合优化设计
Stiffened Rib
Thin Wall Casing
Response Surface Method
Comprehensive Optimal Design
