期刊
COATINGS
卷 11, 期 7, 页码 -出版社
MDPI
DOI: 10.3390/coatings11070774
关键词
hard coating; thin-walled structure; topology optimization; sensitivity; damping; modal loss factors
资金
- National Natural Science Foundation of China [51975567]
- Liao Ning Revitalization Talents Program [XLYC1907152]
- Natural Science Foundation of Liaoning Province Natural Science Foundation of Liaoning Province [2019MS347]
- Autonomous Fund Project of the State Key Laboratory of Robotics [E129030201]
- Youth Innovation Promotion Association [2018237]
- Jiang Xin-song Innovation Fund [20180504]
Hard coating structures are widely studied as a new passive damping method. Local coverage can achieve better vibration reduction effect and save material costs. The proposed topology optimization method for hard coated composite plates aims to maximize modal loss factors, with numerical examples demonstrating its effectiveness.
At present, hard coating structures are widely studied as a new passive damping method. Generally, the hard coating material is completely covered on the surface of the thin-walled structure, but the local coverage cannot only achieve better vibration reduction effect, but also save the material and processing costs. In this paper, a topology optimization method for hard coated composite plates is proposed to maximize the modal loss factors. The finite element dynamic model of hard coating composite plate is established. The topology optimization model is established with the energy ratio of hard coating layer to base layer as the objective function and the amount of damping material as the constraint condition. The sensitivity expression of the objective function to the design variables is derived, and the iteration of the design variables is realized by the Method of Moving Asymptote (MMA). Several numerical examples are provided to demonstrate that this method can obtain the optimal layout of damping materials for hard coating composite plates. The results show that the damping materials are mainly distributed in the area where the stored modal strain energy is large, which is consistent with the traditional design method. Finally, based on the numerical results, the experimental study of local hard coating composites plate is carried out. The results show that the topology optimization method can significantly reduce the frequency response amplitude while reducing the amount of damping materials, which shows the feasibility and effectiveness of the method.
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