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

<div class="section abstract"><div class="htmlview paragraph">Powertrain mounts are vital for isolating vibrations and enhancing vehicle ride comfort and performance, making their dynamic behavior critical for effective design. This study provides a comprehensive analysis of powertrain mount decoupling by integrating virtual simulations, physical testing, and analytical calculations.</div><div class="htmlview paragraph">In our approach, we first derived stiffness data through analytical calculations, which were validated through multi-body dynamics (MBD) simulations that modeled interactions within the powertrain mounts. By adjusting bush stiffness parameters within the MBD framework, we predicted decoupling frequencies and analyzed kinetic energy distribution. The iterated stiffness values from simulations were then confirmed through physical testing, ensuring consistency in decoupling frequencies and energy distribution. This alignment between virtual and experimental data enhances the reliability of our findings and helps identify overlapping frequencies across vehicle systems, crucial for avoiding resonance.</div><div class="htmlview paragraph">A key novelty of our approach is its application in the early design phase. Unlike conventional methods that rely on optimization in later stages, our methodology allows for the positioning and orientation of powertrain mounts to be optimized from the outset. This enables the creation of more realistic powertrain mounts during the conceptual design phase, facilitating high-accuracy optimization of secondary ride and vibration performance and providing a "first-time-right" solution from the concept stage.</div><div class="htmlview paragraph">The results demonstrate strong correlations across all three methods, offering a well-rounded understanding of powertrain mount dynamics. This research advances design methodologies, highlights the benefits of virtual testing, and improves powertrain mount performance in automotive applications.</div></div>