基于載荷路徑法的機翼可變后緣柔順結構拓撲優(yōu)化研究.pdf

1、南京航空航天大學碩士學位論文基于載荷路徑法的機翼可變后緣柔順結構拓撲優(yōu)化研究姓名：王婷申請學位級別：碩士專業(yè)：測試計量技術及儀器指導教師：王幫峰2010-12基于載荷路徑法的機翼可變后緣柔順結構拓撲優(yōu)化研究 II ABSTRACT Adaptive wing is one of development directions of future aircrafts. According to the flight state and fl

2、ow conditions, it change shape self-acting to keep optimal pneumatic appearance, this make it improve the aircraft comprehensive performance significantly. Compliant mechanism can transmit force、energy、displacement and r

3、ealize deformation through their own elastic deformation. As a new and developing mechanism, compliant mechanism can not only achieve continuous smooth shape changing, but also without assembly and friction, which is nee

4、ded in adaptive wing, for this reason compliant attracted researchers’ attention. This paper used the compliant mechanism to realize the adaptive wing. On the basis of up to date design method of the compliant from hom

5、e and abroad, analyzed and compared traditional topology designs and topological optimization based on the load path. Then picked up the advantages of the latter from the comparison, made sure applying the topology optim

6、ization based on the load path to design trailing of adaptive wing, which was the first time in the research both topological optimization based on the load path and the trailing of adaptive wing. First of all, according

7、 to the definition of topological optimization based on the load path, determined load paths by KSSP algorithms after initializing the design area. Secondly according to the idea of this method, chose reasonable design v

8、ariables and made sure update scheme about these variables. This process solved the problem in putting theoretical method into practice. Thirdly, established parametric finite element model with the PCL (Patran Command L

9、anguage) language in the finite element software Patran for next optimization. Then through choosing optimization algorithms after optimization model had been made up, got the result which has been proved feasible in the

10、 finite-element analysis. Finally, in order to confirm this result further, made a physical model of trailing rib for experiment. The experimental result showed that the rib obtained a preferable fruit and achieved expec

11、tant aim. It demonstrated the topological optimization based on the load path, which was a new design method of compliant mechanism, was feasible in adaptive wing. Key Words: adaptive wing, compliant mechanism, load path