Speaker
Description
This study proposes a CAE(Computer Aided Engineering)-based process to reduce impact buzz noise that occurs when a vehicle door is closed. First, mode analysis on the rear quarter region identifies structural weak points associated with impact buzz noise. Second, DPI(driving point inertance) analysis identifies target frequencies. Third, ODS(operating deflection shape) analysis analyzes deformation behavior during door closing. Fourthly,transient analysis evaluates vibration decay time. Lastly,the damping value derived from the modal model is proposed as a development indicator. Vehicle testing confirms that the impact noise is eliminated by reinforcing the CAE identified weak part, and an improved structure design is derived based on this result.