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Structure and modal analysis of carbon fiber reinforced polymer raft frame

This paper mainly studies the structure of a carbon fiber reinforced polymer floating raft frame and analyzes its vibration mode. A frame-based floating raft frame is designed, and two floating rafts which are made of carbon fiber reinforced polymer and metal materials, respectively, and have the same size and structure are manufactured. Based on the modal theory of vibration, the Abaqus software is used to carry out the finite element modal analysis of the frames which are made of different materials, and compare the low-order flexible frequency and vibration mode. Later, the experimental modal test results are verified with modal assurance criterion, and the modal experiment is conducted to verify the accuracy of finite element modal calculations. The results show that under the circumstance of the same frame vibration mode, the damping ratio of the carbon fiber reinforced polymer frame is much higher than that of the metal frame. In addition, the carbon fiber reinforced polymer frame presents good vibration absorption performance. The data analysis results provide some reference value for floating raft vibration designers.