【摘要】 某型充气床垫是典型的气囊结构,该床垫由新型柔性薄膜材料制成,力学性能复杂。目前,国内外气囊仿真研究多采用两种方法,一种是控制体积方法(CV),该方法比较简便计算需求较少,但计算精度只能满足一般的工程需要;另一种方法是基于有限元技术的ALE方法,该方法计算精度高,可用于气囊的详细仿真。针对充气床垫充气爆破工况和载人工况的复杂性,采用多物质ALE方法对其进行了详细数值模拟。充气爆破工况通过与物理试验对比,判断出床垫结构的薄弱位置,同时提出结构改进方案。载人工作工况通过参数分析方法,分析不同充气内压时床垫变形和应力状况,并判断出床垫最佳工作内压。最终的仿真结果可作为该型产品设计定型的重要依据,也为同类问题提供了参考。更多还原

【Abstract】 An air-charge mattress is a typical air bag manufactured using new flexible film material with complex mechanical property.At present,two methods are used for air bag simulation in domestic and international studies.One is the control volume method(CV) needing less computing demands and being relatively simple,but its accuracy only meets the reguirements of common engineering projects.Another method is ALE method based on finite element technigue,it has good precision and can be used for the detailed simulation of air bags.Aiming at the complexity of two different load conditions,the detailed numerical simulation based on the multi-material ALE method was pevfomed.The weak position of a mattress was estimated by contrasting the numerical simulation with the physical test in splitting load condition,and then a structural improvement plan was put forward.Parameter analysis method was used in man-carrying condition,and the stresses and vertical displacements of the mattress were compared under different interior pressures.Then,the optimal interior pressure of the mattress in man-carrying condition was determined.The final simulation results could be used as a reference for this product design and similar problems.更多还原