Dissertation
Dissertation > Aviation, aerospace > Aviation > Various types of aircraft > Unmanned aircraft

Mechanics Analysis and Optimal Design of Key Bulkheads in UAV

Author DuQiXiang
Tutor TaoWeiMing
School Zhejiang University
Course Solid Mechanics
Keywords UAV FEM Strength Topology optimization HyperWorks Bulkhead
CLC V279
Type Master's thesis
Year 2013
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Launch and recovery systems are key parts of the Unmanned Aerial Vehicle (UAV). Lightweight is developing trend of UAV. On the basis of mechanical analysis using FEM(finite element analysis),the article accomplishes the topology optimization of front and rear bulkheads during the UAV launch and recovery conditions.Firstly, the article introduces UAV development process, launch and recovery conditions, as well as the latest developments in structural optimization statements at home and abroad, followed by a brief exposition of the basic idea of the FEM and optimization techniques. At last the optimization software HyperWorks and topology optimization process are introduced.In addition, using ABAQUS software to achieve static and dynamic finite element analysis of UAV front and rear bulkheads during launch and recovery conditions, results show that the UAV can meet the strength requirements of varieties of operating conditions and performance requirements, apart from some parts need redesign. Consistency of static and dynamic analysis results prove that the structure of static force simulation can meet the structural strength checking requirements.Finally, under multiple load conditions, in order to further improve the structure of the key components of UAV, artical utilizes the OptiStruct module in the HyperwWorks software to complete topology optimization of the key components based on the variable density method. By comparing the finite element analysis results before and after the optimization of the key components, it can be seen that mass has been greatly reduced and UAV has achieved lightweight requirements.

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