| Magnesium alloy with light weight, high strength, vibration, heat conductivity andelectromagnetic shielding ability strong, easy to recycle is a new generation of highperformance structural material to instead of steel, aluminum and engineering plastics.Extruded section is a promising product in all kinds of magnesium alloy products. It hasa very broad application prospects. Due to the existence of the problem that the researchon vibration characteristics of magnesium alloy material is not enough in-depth andsystem and the factors influencing the vibration characteristics of magnesium alloyprofile is not yet clear, magnesium alloy damping vibration reduction performance wasnot well. According to the above problems, this paper studied the different process,structure, and high polymer filler material etc. The influence of the vibrationcharacteristics of AZ31magnesium alloy profile with a method which combine theexperiment and simulation. The purpose of it is to provide data support andrationalization proposal for vibration characteristics of magnesium alloy materialresearch and design.Firstly, the effects of process and structural on vibration properties of the AZ31magnesium alloy profile were studied. According to the research of AZ31magnesiumalloy sheets under different process, mechanical, damping and vibration performance,the effect of the process were analyzed. At the same time, according to the research ofAZ31magnesium alloy sheets under different forms, the influence of different structurevibration performance of AZ31magnesium alloy profile were studied. The results showthat hot extrusion process is helpful to improve the mechanical properties of AZ31magnesium alloy materials but helpless to improve the damping properties. Two differentways of cooling have less influence on mechanical and damping properties for extrudedalloys. The vibration reduction performance of AZ31magnesium alloy plate is better andit associated with the damping properties and mechanical properties of materials. Inaddition, the result of the research on different shapes of AZ31magnesium alloy profilesvibration performance shows, profile of the vibration performance is related to itsstructure.Next, the effects of composite damping structure vibration properties of the AZ31magnesium alloy profile were studied. The common foam (EPS, EPE) and rubber (SBR),and the extrusion AZ31magnesium alloy materials were selected to make two kinds of interlayer and sandwich damping structure. Vibration performance were studied.Experiments of vibration properties of the sandwich damping structure of magnesiumalloy AZ31sheet and wide profile were analyzed. The effect of different polymer fillermaterial and filling way AZ31profiles of vibration performance were studied to choosethe best filling way. The result shows, both the interlayer and sandwich damping structurecan improve the anti-vibration performance of AZ31magnesium alloy, vibrationreduction performance of it is related to the part material and the structure of the dampingof sandwich materials. Lower the interlayer part material modulus is, stronger thevibration reduction performance is. Sandwich damping structural shapes of vibrationreduction performance is higher than the interlayer damping structure material. The EPE+SBR sandwiches material damping structure of magnesium alloy material has goodanti-vibration performance. Choose the best place to find out the high polymer materialusing method of experiment combined with numerical simulation, to realize overallvibration extruded at the same time, achieve the purpose of saving materials.Lastly, the effects of the different structure’s impact on shock absorptionperformance of magnesium alloy material were studied. Using the ABAQUS finiteelement simulation analysis, the shape of the optimal structure were found out from thecommon profile. The influence factors of the vibration structure profile were studied withorthogonal test. Then, the profile with optimal structure and vibration performance werechanged with mirror. Experimental and simulation were studied. The result shows,triangular steel plate structure of AZ31magnesium alloy material damping performanceis best. The most reasonable design of stiffened plate is45°. Main factors influencingvibration characteristics of AZ31magnesium alloy profile is the profile of cross-sectionis high, wall thickness of minimal impact. the design of the sine stiffened plate canweaken the profiles of the upper bearing. Adding tilted stiffened plate constitutes trianglestructure stability to reduce the stress and displacement of overall profile in rectanglestructure profile. |
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