多工况下机翼结构优化设计方法研究
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摘要
从工程实际需要出发,提出了一种考虑了位移约束、应力约束与稳定性的机翼多工况优化方法。将多工况问题转化为多约束问题,对各种约束进行合理分类,利用最大约束法对约束进行合理的消减,使用复合形法对结构进行优化。算例结果表明,所提方法可行,结果正确,对加快结构优化技术的实际工程应用有着很高的价值。
In order to meet the need of the engineering practice,a method was proposed in this paper for solving the question of structure design optimization of the wing subjected to the displacement、stress and stability constraints under multiple load cases.The optimization under multiple load cases was translated into the optimization under multiple constraints,and then the constraint functions were separated into some kinds according to their characteristic and cut by the maximum constraint method properly.Finally the Complex Method was used to complete the optimization.The results of the calculative examples indicate that the method presented in this paper is feasible and correct,has a significant value in accelerating the engineer realization of the structure optimization.
In order to meet the need of the engineering practice,a method was proposed in this paper for solving the question of structure design optimization of the wing subjected to the displacement、stress and stability constraints under multiple load cases.The optimization under multiple load cases was translated into the optimization under multiple constraints,and then the constraint functions were separated into some kinds according to their characteristic and cut by the maximum constraint method properly.Finally the Complex Method was used to complete the optimization.The results of the calculative examples indicate that the method presented in this paper is feasible and correct,has a significant value in accelerating the engineer realization of the structure optimization.
引文
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[2]Dube R.,Hansen J.S.Optimal Design for Structures Subjected to Many Load Cases[R].AIAA 2004-4531.
[3]Deepak Kaushal.Techniques for Structural Optimization Under Uncertain Loading Conditions[J].Master paper of the university of Toronto.
[4]李孝全,王莉.反射面型天线结构多工况离散变量优化设计[J].宇航学报,2001,22(2):56-60.
[5]王英杰.多工况下复杂杆系结构的截面优化研究[J].燕山大学学报,2001,25(3):242-244.
[6]欧海龙,李向真.多层复合形法在结构优化中的程序设计[J].世界地震工程,2000,16(14):113-117.
[7]陈永会,李海虹,李志潭.复合形法解决多维非线形有约束优化问题[J].精密制造与自动化,2002(3).
[8]苟文选,等.材料力学[M].西安:西北工业大学出版社,2000.
[9]丁运亮,结构优化设计[M].航空专业教材编审组出版.
[10]陈树勋,裴少帅.一种简明易用的结构优化的包络函数[J].现代制造工程,2004(7).
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