Automotive body squeaking noise analysis based on maxwell viscoelastic model

The transition to electric vehicles (EVs) has heightened the significance of secondary noise sources, such as buzz, squeak, and rattle (BSR), which can detract from vehicle quality and customer satisfaction. Among these, body squeaking noise, particularly during the electro-coating (e-coating) process, presents a notable challenge due to its impact on vehicle acoustic comfort. Despite advancements in automotive noise, vibration, and harshness (NVH) control, the specific viscoelastic mechanisms contributing to squeaking noise under varying thermal and mechanical conditions remain inadequately understood. This study addresses these gaps by employing the Maxwell Viscoelastic Model to investigate the time-dependent mechanical behavior of body-in-white (BIW) coatings during the e-coating process. Key finding indicates that the glass transition temperature (<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msub><mml:mrow><mml:mi>T</mml:mi></mml:mrow><mml:mrow><mml:mi>g</mml:mi></mml:mrow></mml:msub></mml:math>) of the coating material plays a critical role in noise occurrence, particularly under high-temperature conditions and road-induced vibrations. This research contributes novel insights to the field by integrating theoretical analysis with empirical data to enhance the understanding of viscoelastic properties in automotive coatings.