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汽车ECU(发动机控制器)是发动机控制管理系统中涉及人身安全的重要零部件之一。其常年处于发动机舱的严苛工作环境中,并且必须承受环境应力的作用。为保证控制器内部线路板在寿命期内正常工作和可靠运行,控制器密封结构胶接接头的设计已成为控制器开发的关键技术之一。理论计算分析、计算机模拟仿真和环境试验验证,作为贯穿整个开发阶段的3大手段,可有效确保ECU密封结构设计的可靠性。本研究运用剪滞模型的解析方法,建立了控制器密封结构胶接接头的力学模型,并分析计算了该模型在刚度不平衡的实际情况下,承受高压喷水负载后胶接接头中胶层应力和应力分布的情况。运用ABAQUS软件,对控制器密封结构胶接强度进行了模拟,并将结果与理论计算值进行对比,得出一致结论。通过ECU的防水试验,证明了控制器胶接结构设计的有效性。本研究对变速箱控制器、车身控制器等其他具有类似密封结构的汽车控制器的设计开发,也具有良好的参考意义。
Automotive ECUs (Engine Controllers) are one of the most important parts in the engine control management system that involve personal safety. It is perennial in the harsh operating environment of the engine compartment and must withstand the effects of environmental stresses. In order to ensure the normal operation and reliable operation of the circuit board inside the controller during the life of the controller, the design of the controller sealing structure cementing joint has become one of the key technologies for controller development. Theoretical calculation and analysis, computer simulation and environmental test validation, as the three major means throughout the development stage, can effectively ensure the reliability of the design of the ECU seal structure. In this study, the analytical model of shear lag model was used to establish the mechanical model of the joint of the controller with the seal structure. In the actual situation of unbalanced rigidity, Stress and stress distribution. The ABAQUS software was used to simulate the bonding strength of the sealing structure of the controller. The results were compared with the theoretical calculation to reach a consensus conclusion. Through the ECU waterproof test, proved the effectiveness of the controller bonding structure design. This research also has a good reference meaning for the design and development of other vehicle controllers with similar sealing structure such as transmission controller and body controller.