Modal analysis of diesel aftertreatment device based on ANSYS Workbench
ZHOU Xiaoyan, LI Bing, KONG Fenxia, CHEN Zhen, ZHANG Ting, LU Guodong
（Hangzhou Yinlun Technology & Engineering Co., Ltd., Hangzhou 310013,China）
Abstract:  Diesel engine has an advantage in power, economy and reliability contrast to gasoline engine, but it also has a serious disadvantage with high NOx emissions. Therefore, it is necessary to add an aftertreatment device. aiming at avoiding resonance with engine, a diesel engine aftertreatment finite element model was established with ANSYS Workbench. Modal analysis was conducted on the aftertreatment device through the software of ANSYS Workbench so as to identify the modal parameters of the aftertreatment device, the first 6 natural frequencies and vibration features．And the results show that the natural frequency of the aftertreatment device is greater than that of the engine, and it won′t produce resonance. The results provide theoretical basis for designing and improving diesel aftertreatment devices.
Key words: ANSYS Workbench; diesel aftertreatment; modal analysis