Design Of Air-conditioning Internal Transportation Packaging Based On Finite Element Analysis

With the rapid development of the e-commerce industry,the number of express delivery has increased sharply.In order to reduce the rate of product damage,excessive packaging has been adopted,resulting in a large number of package garbage bringing burden to the environment.Among them,the price of household appliances is expensive and easy to be damaged,which causes serious economic losses due to improper packaging every year.Therefore,this paper takes the air conditioning of household appliances as the research object,takes EPE foamed polystyrene as cushion material,completes the transport packaging design,and carries on the simulation analysis and optimization through the finite element software.Firstly,according to the circulation environment and vulnerability analysis of products,the fragility value,equivalent drop height and the damage form of vulnerable components of air conditioner are determined;secondly,according to the characteristics of products,according to the five-step method of cushioning packaging,the design of cushioning packaging dimension structure and the check of cushioning vibration prevention are carried out;finally,according to the outer dimensions of cushioning packaging,the matching corrugated cartons are designed and the stacking strength is checked.Transportation packaging design for air conditioning internal machine is completed.Product modeling is carried out in Solidworks software,which is imported into Workbench for pre-processing such as material property definition,contact type setting and meshing.Finally,the deformation,stress,strain cloud and acceleration curves of cushioning packaging stacking and falling are obtained under static analysis module and explicit dynamic analysis module.The results of stacking data show that the maximum deformation of air conditioner is located on the second side,the maximum deformation of liner is located on the first side,the maximum stress of liner is located on the second side,the maximum stress of air conditioner is located on the third side,and the mechanical properties of vertical stacking are better than those of horizontal stacking.Drop data results:the maximum acceleration value surface drop is the largest and the angle drop is the smallest.The maximum stress value of air conditioning is the largest edge drop and the smallest corner drop.The simulation results show that the strength of the cushion and air conditioning are within a reasonable range,which proves that the designed cushion is in line with the verification.On the basis of guaranteeing cushioning effect,the volume of cushion is reduced,and the structure of local hollowing of cushion is improved.Through multi-objective driving optimization,the optimal combination of excavation dimension parameters is determined under certain constraints.After structure optimization and parameter optimization,the liner is re-modeled and simulated.By comparing the data before and after optimization:the structure optimization is compared with the not optimized,the shrinkage stress of the liner decreases,and the overall deformation of the liner increases;the size optimization is compared with the structure optimization,and the liner deformation is also reduced on the basis of the reduction stress of the liner volume.It shows that the optimized cushion is more in line with the principle of lightweight.The cushion packaging absorbs the energy transferred from outside to air conditioning through its own deformation,better protects the contents and satisfies the cushion check.This study provides a reference for lightweight design of transport packaging of other electrical products.