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Because of deformation energy damping material properties, is widely used in modern aviation, aerospace, marine, transportation, heavy machinery and other areas controlled wideband random noise excitation vibration and noise. In the damping material development and research, the piezoelectric damping material for its new energy and dissipation mechanisms and possible partial or complete control of active damping attracted more and more attention. In this paper, a bisphenol A type epoxy resin (EP) as the substrate, lead zirconate titanate magnesium niobate (PMN) is a piezoelectric phase, conductive carbon black (CB) as the conductive phase, casting molding method using a resin prepared 0-3 piezoelectric phase / conductive phase / epoxy composites. By changing the composition of each component to study composition on PMN / CB / EP composite damping performance, using DMA and DASP damping properties of the test material. Determine the optimal damping ratio, and thus the ratio of the composite material as the damping layer, load bearing hull model component preparation, testing its damping performance related engineering parameters. Through testing and analysis herein the following conclusions: 1. Paper, 10% polyethylene polyamine (mass ratio) mixed with 30% polyamide curing system, the CYD-127 epoxy resin cured product obtained by curing the loss factor reaches 0.82. Curing conditions for the room temperature curing 4h, 100 ℃ cured after 2h. (2) was prepared via the casting molding 0-3 PMN / EP composite, its damping performance tests found that: Since the piezoelectric effect on the damping properties of PMN contribution, PMN / EP composite integrated damping properties than pure epoxy cured product. PMN volume with increasing content of non-linear change in damping properties, when PMN content of 20% volume, PMN / EP composite βmax, TA, and ΔT the maximum, the damping best performance. 3 were prepared through casting molding 0-3 PMN / CB / EP composite, when the carbon black content (mass ratio) of 6%, PMN / CB / EP composite optimum damping properties. 4 Construction of a simulated load bearing hull model to PMN / CB / EP composite materials as the damping layer material, a piezoelectric composite structure prepared specimens. 5 specimens of composite structures first natural modal structural damping factor of 0.4156, vibration level difference at the 4.64-16.79dB, insertion loss of 6.32dB-18.02dB, PMN / CB / EP composite damping composite structural system played a better damping effect, so that the specimen has good composite structure damping effect; steel structure and a single specimen of vibration level difference in 0.69-1.72dB, because the metal material is a small damping factor, damping architecture performance is poor.
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