Fabrication technology and vibration characteristics analysis of composite cylindrical shell with co-cured damping film embedded
In order to study the vibration characteristics of cylindrical shells made of co-cured damping film embedded composites,a new process for the preparation of cylindrical shell structures made of co-cured damping film embedded composites was developed,and test pieces were designed and prepared.A dynamic modal test platform was built to analyze the fundamental frequency,damping ratio and mode shapes of the cylindrical shell specimens,and to verify the accuracy of the finite element model.On this basis,the influence law of parameter variation on the dynamic performance of the structure is further explored by numerical simulation.The results show that:when the thickness of the inner and outer composite layers is the same,the structure has better dynamic performance;increasing the thickness of the damping layer and taking the appropriate ratio of the damping layer can make the structure obtain larger damping performance and ideal stiffness;there exists an optimal value of the ratio of the length to the thickness of the structural design,and the results provide reference and guidance for the optimization of the design of the cylindrical shell structure of the co-curing damping film embedded with the composite material.
co-cured damping film embedded compositecylindrical shellvibration characteristicsmodal testnumerical simulation
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