Research On Damping Characteristics And Energy Transfer Model Of Honeycomb Paperboard

Honeycomb paperboard is an advanced sandwich structure with light weight,high rigidity,high bending strength,high material utilization rate and high vibration damping efficiency.It is widely used in aerospace,construction industry,packaging and transportation.In this paper,through vibration test,finite element simulation and theoretical analysis,the influence of honeycomb paperboard structural parameters and environmental humidity on the accuracy of its equivalent model and its damping characteristics are analyzed.The most suitable natural frequency analytical formula for honeycomb paperboard is deduced,and the difference equation of energy transfer in each stage of honeycomb paperboard vibration is given.This equation can obtain the vibration transmission energy of the honeycomb paperboard according to its structural parameters and environmental parameters.This calculation result can not only be applied to its own design,but also can bring reference value for other similar structure applications.The main content of this article as follows:Firstly,tensile experiments and vibration tests were carried out on the honeycomb base paper and honeycomb paperboard treated in different humidity environments,and the mechanical parameters of honeycomb paper and honeycomb paperboard quality factors with different moisture content were obtained.Provide parameters for subsequent equivalent model calculations and provide data support for subsequent analysis.Secondly,three commonly used honeycomb equivalent panel models are summarized:Reissner equivalent model,Ekavall equivalent model and Sandwich sandwich panel model.The finite element modal analysis of the equivalent plate is compared with the experimental results,and the influence of the cell side length,thickness and core paper weight of the paper honeycomb sandwich plate on the accuracy of the equivalent model is analyzed.Finally,the influence of these three variables on the calculation accuracy of different models is summarized,and on this basis,the natural frequency analysis equation of the paper honeycomb sandwich panel is obtained,which provides a basis for the model selection of the paper honeycomb sandwich panel.It is found that the Ekavall equivalent model is similar.Compared with the other two,it is more suitable for honeycomb paperboard.Thirdly,based on experiments analysis,this paper gives the trend of the quality factor of honeycomb paperboard affected by structural parameters and environmental humidity,and analyzes the relationship between the quality factor and the vibration damping performance,and finds that the quality factor increases with the thickness of the paper honeycomb sandwich panel and the side length of the cell.However,the thickness of the honeycomb is linearly related to it,and the side length of the honeycomb cell is quadratic to it.With the increase of the thickness of the paper honeycomb sandwich panel and the side length of the cell,the increasing trend of the quality factor gradually slows down.According to the relationship between the damping ratio and the quality factor,the equations related to the damping ratio and the water content,thickness,and cell side length are further fitted based on this,and its reliability is verified.Finally,the impact of environmental parameters and structural parameters on the vibration damping ability of honeycomb paperboard is given in the angle of energy transfer.Through the analysis of the energy transfer in the vibration process of the paper honeycomb sandwich panel,the calculation method of the vibration energy transfer difference is derived based on the single-degree-of-freedom damping vibration model,and the vibration process is divided into three parts,which are platform area?amplification area and attenuation area.Calculate the energy transfer of honeycomb paperboard with different structural parameters under different moisture content at each stage.It is found that the energy transfer difference in the amplification zone is much larger than that in the attenuation zone.And with the increase of thickness,cell side length and environmental humidity,the energy transfer difference between the amplification zone and the attenuation zone will increase,but the increase in the energy transfer difference between the amplification zone means that the vibration damping capacity is weakened,and the energy transfer in the attenuation zone The difference means that the damping capacity is increased.