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The modeling method for vibration characteristics analysis of composite laminated rotationally stiffened shell
Dong Shi1, Hong Zhang2,3, Yiqun Ding2
1VMTT INDUSTRY CO., LTD, Chongqing, PR China.
Plos One
|June 18, 2024
Summary
This study models composite laminated rotationally stiffened shells, analyzing their vibration characteristics under elastic boundaries. Findings guide noise reduction in aerospace and marine structures.
Area of Science:
- Mechanical Engineering
- Materials Science
- Structural Dynamics
Background:
- Composite laminated rotationally stiffened shells are crucial in aerospace, aviation, and marine engineering.
- Understanding their vibration characteristics is vital for structural integrity and performance.
Purpose of the Study:
- To develop a robust modeling method for analyzing vibration characteristics of composite laminated rotationally stiffened shells.
- To investigate the influence of varying elastic boundary conditions on shell vibration.
Main Methods:
- Established a model using the first-order shear deformation theory (FSDT) and modified Fourier series.
- Utilized artificial virtual spring technology for complex elastic and coupling boundary simulations.
- Employed the Rayleigh-Ritz method to solve the energy function and determine vibration characteristics.
Main Results:
- Verified the fast convergence and accuracy of the developed modeling approach.
- Analyzed the impact of parameters like shell dimensions, boundary stiffness, cone angle, and stiffener configurations on vibration.
- Demonstrated the model's capability to simulate diverse elastic boundary conditions.
Conclusions:
- The study provides a theoretical framework for analyzing the vibration of composite laminated rotationally stiffened shells.
- The findings offer practical guidance for noise reduction design in related engineering applications.
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