Bushing Stiffness Optimization Method for NVH Improvement Using Blocked Force and Energy-Based Index in Suspension System AARC, Seoul National University

Format:

Book

Conference/Event

Author/Creator:

Oh, Jun Young, author.

Contributor:

Cho, Munhwan

Ih, Kang-Duck

Kang, Yeon June

Song, David

Conference Name:

13th International Styrian Noise, Vibration & Harshness Congress: The European Automotive Noise Conference (2024-06-19 : Graz, Austria)

Language:

English

Physical Description:

1 online resource cm

Place of Publication:

Warrendale, PA SAE International 2024

Summary:

Reductions in powertrain noise have led to an increased proportion of road noise, prompting various studies aimed at mitigating it. Road excitation primarily traverses through the vehicle suspension system, necessitating careful optimization of the characteristics of bushings at connection points. However, optimizing at the vehicle assembly stage is both time-consuming and costly. Therefore, it is essential to proceed with optimization at the subsystem level using appropriate objective functions. In this study, the blocked force and energy-based index derived from complex power were used to optimize the NVH performance. Calculating the complex power in each bushing enables computing the power flow, thereby providing a basis for evaluating the NVH performance. Through stiffness injection, the frequency response functions (FRF) of the system can be predicted according to arbitrary changes in the bushing stiffness. Based on this, the blocked force and the energy-based index can be evaluated. Using these values as objective functions, optimization algorithms can be applied to derive a combination of stiffness changes that enhance NVH performance

Notes:

Vendor supplied data

Publisher Number:

2024-01-2921

Access Restriction:

Restricted for use by site license