基于Virtual Lab研究影响空气滤芯消声能力的因素

Using Virtual Lab to Valid Factors Effect Ability of Noise Elimination of Air Filter Element

进气系统噪声是汽车的主要噪声源之一,它直接影响着车内噪声和通过噪声,从而影响着驾乘人员的驾乘感受和能否满足通过噪声的法规要求。空气滤清器作为进气系统的关键零部件之一,它不仅仅起到保护发动机的能力,还具备着降低进气系统噪声的能力。空气滤芯作为多孔介质,不仅能吸收噪声,还可以通过多孔区域将声能转化为热能从而消除噪声,而影响空气滤芯降噪能力的因素主要为流阻率、孔隙率和结构因子,而三个因素是如何影响空气滤芯的消音能力就需要通过仿真分析进行验证。文章通过Hyper mesh和Virtual Lab软件进行传递损失联合仿真分析,验证各个因素对滤芯消声能力的影响。

Noise of intake system is one of the main noise souse of vehicle,it affects noise level of driving cab and bass-by noise directly,thus driving feeling and regulation of bass-by noise will be affected.As a main component of vehicle,air filter box not just protects engine,also has ability of noise elimination.As a porous material,air filter element can absorb noise,also can transfer acoustic power to heating power and eliminate noise.There are three factors influence ability of noise elimination of air filter element,they are flow resistivity,porosity and tortuosity,we need to valid how the factors impact ability of noise elimination by simulation.Hyper mesh and Virtual Lab will be used to simulate transmission loss of air filter box and valid factors effect ability of noise elimination.