Abstract：An air-charge mattress is a typical air bag, which is manufactured by new flexible film material with complex mechanical property. At present, two methods are used in air bag simulation in domestic and international research, one is the control volume method (CV), which needs less computing demands and is relatively simple, but the accuracy can only meet common project; Another method is ALE method based on finite element technology, which has good precision and can be used for the detailed simulation of air bags. Aimed to the complexity of two different load conditions, this paper performs detailed numerical simulation based on multi-material ALE method. The weak position of the mattress is estimated by contrasting numerical simulation with physical test in splitting load condition, and then structural improvement plan is put forward. Parameter analysis method is used in the bearing person calculation, and stress and vertical displacement of the mattress are contrasted in different interior pressure. Then the optimal interior pressure of the mattress in bearing person condition is determined. The final simulation results can be used as an important reference for this product and similar problems.
2012, Vol. 31 
