Evaluating Powertrain Mount Decoupling: Insights from Simulation, Experimental Results, and Analytical Calculations

This study presents a thorough examination of engine mount decoupling by integrating virtual simulations, physical testing, and analytical calculations. Engine mounts are crucial for isolating vibrations and enhancing vehicle comfort and performance, making their dynamic behavior vital for effective design. In our approach, we employ multi-body dynamics (MBD) simulations to model the interactions within engine mounts. By adjusting the bush stiffness parameters in the MBD framework, we can predict decoupling frequencies and analyze kinetic energy distribution. The bush stiffness values used in simulations are then applied in physical testing, ensuring consistency in the results for decoupling frequencies and kinetic energy distribution. This alignment between virtual and empirical data significantly enhances the reliability of our findings. Moreover, we conduct analytical calculations that correspond with the results from both the simulations and physical tests. This comprehensive approach not only validates the accuracy of our models but also helps identify overlapping frequencies across various vehicle systems, which is essential for preventing resonance. The results demonstrate notable correlations among the three methodologies, offering a well-rounded understanding of engine mount dynamics. We discuss any discrepancies, focusing on factors such as material properties and boundary conditions that could impact performance. In conclusion, this research contributes to the advancement of design methodologies and the improved performance of engine mounts in automotive applications. It underscores the effectiveness of virtual testing, highlighting its advantages over traditional experimental and analytical techniques in engineering analysis.