Cushioning Characteristics Analysis And Optimization Of Some Cushioning Package Based On ANSYS/LS-DYNA

Cushioning package plays an important role in product logistics process and is more andmore took into account by the enterprises and consumers. The function of cushioning packageis mostly to resist the vibration and drop in the process of transportation, and protect productsfrom damage or destruction. This paper chose the overall cushioning package of some grandelectric cooker as the object of study, and conducted thorough research of its dynamiccushioning properties and structural optimization based on the ANSYS Workbench simulationanalysis software.Firstly, dynamic cushioning theory of transport package was teased and studiedsystematically, including the vibration transmissibility, energy absorption theory, the forcedvibration of single freedom system and drop impact theory of nonlinear characteristicspackage. The research results showed that the cushioning performance of the overall packagewas related to a variety of factors. In order to evaluate the cushioning efficacy more intuitiveand accurately, acceleration response of the product could be used as the evaluation index ofcushioning performance of the package.In order to get the simulation parameters of materials, honeycomb paperboard andcorrugated paperboard were equivalently replaced based on the flexural rigidity of paperboard.Tensile test was performed on packaging base paper to calculate the paperboard parameters bythe empirical formula and the equivalence principle. Static compression test was performedon cushioning package materials to get the stress-strain curve and calculate the compressivemodulus of elasticity and other material parameters needed in the simulation analysis.ANSYS Workbench simulation analysis software was applied for the finite elementmodeling of the product overall package, established the simulation analysis models ofharmonic vibration and free drop incentive environments combined with the test conditions,and accomplished the analogue simulation. The results of experiment and simulation showedthat there was certain deficiency existed in the original cushioning package. The bottomcushioning pad was subjected to stress concentration, together with the lack of the thicknessand strength to make it become the weak link of the cushioning package and need to bestructural optimization designed.Using recyclable environmental-protection cushioning materials, the cushioning packageof the object was optimized. To conform to the requirements of moderate packaging, theoptimized structures were optimized for reduction. ANSYS Workbench simulation analysissoftware was applied for the finite element modeling of the optimized structures, andanalyzed the pros and cons of the cushioning performance through the simulation of harmonicvibration and free drop. Comprehensive comparison of the optimized designing schemesindicated that the EPE foamed plastic was the most advantageous cushioning package for thepresent stage. EPE foamed plastic has the properties of adequate cushioning performance,environmental protection and low cost. The feasibility of the cushioning package design wasverified by the random vibration test and drop test.