汽车空气滤清器的结构分析及优化

Structure analysis and optimization of automotive air filter

汽车空气滤清器在工作过程中由于受到汽车发动机的激励以及高速气流的影响所产生的振动会影响空气滤清器的寿命,导致破坏和疲劳失效.针对上述情况,文中运用HYPERMESH软件对空气滤清器建立了有限元模型,对其进行了模态分析,获得其固有频率,并对体积刚度进行了分析,改进其结构设计;通过改变壳体材料、增加安装点、增加壳体厚度等方法进行了结构优化;对优化后的结构再进行模态分析,发现优化后的空气滤清器的结构提高了1阶固有频率和体积刚度,降低了噪声.

The automotive air filter is affected by the automobile engine＇s excitation and the high speed air flow in the work process,producing vibrations that affect the life of the air filter and can cause failure and fatigue failure. In view of the above situation,the finite element model is built by using HYPERMESH software. Then the modal analysis is made,the natural frequency is obtained,and the volume stiffness is analyzed to improve its structure design. Meanwhile,the volume stiffness is analyzed. By changing the shell material,increasing the installation point and increasing the shell thickness,the structure optimization method is carried out. After optimizing the structure,modal analysis of the structure is made. It is found that the structure of the optimized air filter improves the natural frequency and the volumetric stiffness,and reduces the noise.