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| Shape optimization of five-center shell structure based on response surface method |
| Received:October 15, 2009 Revised:October 02, 2010 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7511/jslx20116005 |
| KeyWord:response surface method five-center shell structure shape optimization secondly development |
| Author | Institution |
| 杜家政 |
北京工业大学 机械工程与应用电子技术学院, 北京 |
| 隋允康 |
北京工业大学 机械工程与应用电子技术学院, 北京 |
| 阳志光 |
北京宇航系统工程研究所, 北京 |
| 龙连春 |
北京工业大学 机械工程与应用电子技术学院, 北京 |
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| Abstract: |
| Three-center shell structure is often adopted in the domain of national defense,aviation and spaceflight,and so on.The generatrix of three-center shell structure is composed of three arcs with three centers,so the name is called.The three-center shell structure has few adjustable parameter variables and less potential of optimization.The three-center shell structure is developed to five-center shell structure to increase the adjustable parameter variables,and then to optimize the structure.Combining the response surface method and the parameterized model,the model with structural weight as object function and structural strength as constraint is built.According to the structural shape,the independent design variables are selected.The analytical expression of the structural weight and the first derivative of the structural weight to the design variables are deduced to get the one-order Taylor expression.Adopting the response surface method to obtain the one-order expression of the maximal stress to the design variables,the shape optimization model in linear programming form is built.The analysis model is built by programming with MSC/PCL (Patran Command Language),and the parameters about design variables are parameterized.The structure is continually modified in the process of iteration,and the optimal design is obtained at last.The numerical examples show that the method is very flexible and can be used widely,and the optimization results are stable and exact. |
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