Pietrusiak Damian, Wróbel Jakub, Czechowski Mateusz, Fiebig Wiesław
Faculty of Mechanical Engineering, Wroclaw University of Science and Technology, Łukasiewicza 7/9, 50-371 Wroclaw, Poland.
Nexteer Automotive Poland, NVH Department, Towarowa 6, 43-100 Tychy, Poland.
Materials (Basel). 2022 Mar 24;15(7):2406. doi: 10.3390/ma15072406.
The ongoing shift towards hybrid and electric vehicles has a strong impact on noise and vibration engineering. New, complex dynamic phenomena are brought to vehicle user attention due to the absence of internal combustion engines and the significant role in vehicle and drive feel perception. This paper presents an FEM (Finite Element Method) dynamic simulation model of an automotive Electric Power Steering assembly. Preliminary modal simulations and experiments as well as field data replication techniques were implemented to identify the phenomena and prepare and validate model components. A full dynamic model of an Electric Power Steering was presented, and fine-tuned including the presence of lubrication at the gear mesh interface. Experimental investigations were conducted alongside FEM simulations for various model setups. Linear and nonlinear contact stiffness models were implemented, as well as contact damping, and simulated at chosen assembly interfaces. The results indicated that in the case of NVH (Noise Vibration and Harshness) analysis of shock/impact originating problems, contact parameters used for static, quasi-static, and low velocity analyses were not applicable. Nonlinear and damped contact stiffness provided better results in such a case.
向混合动力和电动汽车的持续转变对噪声和振动工程产生了重大影响。由于内燃机的缺失以及其在车辆和驾驶感受感知中的重要作用，新的、复杂的动态现象引起了车辆用户的关注。本文提出了一种汽车电动助力转向组件的有限元法（FEM）动态仿真模型。实施了初步模态仿真和实验以及现场数据复制技术，以识别这些现象并准备和验证模型组件。给出了电动助力转向的完整动态模型，并进行了微调，包括考虑齿轮啮合界面处的润滑情况。针对各种模型设置，在进行有限元模拟的同时开展了实验研究。实施了线性和非线性接触刚度模型以及接触阻尼，并在选定的装配界面进行了模拟。结果表明，在对源于冲击/撞击问题的噪声、振动与声振粗糙度（NVH）分析中，用于静态、准静态和低速分析的接触参数并不适用。在这种情况下，非线性和带阻尼的接触刚度能提供更好的结果。
