Structural Optimization Design and Natural Mode Analysis of Small Four Rotors UAV

The finite element analysis method is applied to optimize the shell structure of small four rotors UAV, and static analysis and natural mode analysis are carried out. The overall scheme of small four rotors UAV is designed and arranged. The four rotors UAV is preassembled by using SolidWorks and its structure are modeled in three dimensions. The finite element method is used to optimize and analyze the structure and natural state of the small four rotors UAV. The static numerical analysis and multimodal numerical analysis of the whole body and components of the four rotors UAV are carried out by using SolidWorks and workbench software, and the structural stress of the four rotors UAV is analyzed. Through analyzing the check results, it is shown that the strength and stiffness are qualified, the scheme is feasible and the design is reasonable; the overall structure design of the small four rotors UAV is reasonable without interference and meets the requirements of design strength and design stiffness.