Evaluation of automotive weatherstrip by coupled analysis of fluid-structure-noise interaction

Document typeConference report
Defense date2013
PublisherCIMNE
Rights accessOpen Access
Abstract
Automotive weatherstrip plays a major role in isolating the passenger compartment
from water, dust and noise, etc. Among them, the wind noise through weatherstrip is the most
severe factor making the passenger uncomfortable. Weatherstrip should be in contact between
the door and the body frame, and sufficient contact area is needed to minimize the wind noise
through weatherstrip. But there are several factors that make it difficult to ensure sufficient
contact area. First, weatherstrip rubber deteriorates as time goes by and residual stress in the
rubber becomes relaxed which results in the decrease of the contact area. Second, the gap
between the door and the body increases due to pressure difference at high speed. In order to
predict and reduce wind noise through weatherstrip, nonlinear behaviour of rubber at high speed
and he effect of rubber deformation to wind noise should both be analyzed. In the paper, rubber
deformation with time is obtained by hyperelastic and viscoelastic analyses, while the gap
between the door and the body frame of the vehicle going at a high speed was predicted by the
coupled analysis, Fluid-Structure Interaction (FSI). And also Statistical Energy Analysis (SEA)
calculates the amount of wind noise numerically caused by rubber deformation under high
speed condition.
ISBN978-84-941407-6-1
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