Abstract: In this article, the post processor assembly of a heavy duty truck occurres bracket localized cracking problem during the testing process of electromagnetic vibration test system. Proposes a simulation analysis and improvement method based on digital electrodynamic vibration test system. By establishing digital electrodynamic vibration test system simulation model, reproduces and locates the weak links of bracket cracking. The structure of the bracket is targeted optimized according to the simulation analysis results. The bracket improved design is validated through the confirmation of digital electrodynamic vibration test system, and no cracking occurres in the physical bench test. This validates the effectiveness of the simulation model. By establishing simulation analysis of digital electrodynamic vibration test system, can significantly improve the fatigue durability design efficiency of assemblies and components, shorten product validation cycles, reduce product development costs, and provide an efficient technical pathway for the reliability verification of heavy-duty truck components.

Key words: post processor bracket; bracket cracking; finite element bracket cracking; digital electrodynamic vibration test system; fatigue analysis

摘要： 文章针对某重卡后处理总成在电磁振动台架试验过程中出现支架局部开裂的问题，提 出一种基于数字化电磁振动台架的仿真分析和改进方法。通过建立数字化电磁振动台架仿真 模型，复现并定位支架开裂的薄弱环节，结合仿真分析结果对支架结构进行针对性优化；支 架改进方案通过了数字化电磁振动台架验证，物理台架试验未再出现开裂现象，有效验证了 仿真模型的准确性。通过建立数字化电磁振动台架仿真分析方法能够显著提升总成及零部件 的疲劳耐久性能设计效率，缩短产品验证周期，降低产品研发成本，为重卡零部件可靠性验 证提供了高效技术路径。

关键词: 后处理支架；支架开裂；有限元模型；数字化电磁振动台架；疲劳分析