実験計測に基づく解析による自動車の過渡応答改善

抄録

In recent years, the demand for improvement of ride comfort in automobiles has been increasing, and the demand for quietness in the vehicle interior also increased. In particular, noise in the low-frequency range is one of the most important interior properties and has been the subject of various studies, but there have been few studies on the transient noise generated in a vehicle cabin when a shock input is applied. In this study, we attempt to improve the transient response to reduce the booming noise in the low frequency range caused by the shock input. First, the vibration characteristics of the test vehicle were determined based on data obtained from experimental measurements. As a result, it was found that ceiling deformation, which adversely affects vibration noise, occurs at a specific frequency. Next, based on the experimental measurements, a sensitivity analysis was performed to determine the appropriate mass addition, and mass addition was actually performed on the test vehicle. As a result, the transient response to shock input was improved as the sensitivity analysis predicted.