Simulation And Experimental Validation Of
Vibro-acoustic Transmission Through A Passive
Automotive Door Mount System
Author(s)
D. A. Desai
Abstract
Automotive manufacturers are faced with many challenges to meet everincreasing
industry standards and satisfy customer demands. Two such
requirements are the growing demand for reliable automotive products that can
withstand severe dynamic environments as well as the reduction of automotive
interior noise levels, which is an important concern in noise, vibration and
harshness (NVH) design because of its huge effect as a marketing tool and on the
general pleasure of driving. However, anecdotal evidence suggests that, until
now, the characterisation of structure-borne door panel vibration and its
subsequent noise emission characteristics in terms of its door mount system has
not yet been contemplated. Thus, a three-dimensional finite element (FE) model
with full coupling between the passenger cabin and vehicle body, to simulate the
complex, transient door panel vibration and internal acoustic wave propagation
as a function of the door mount system, when provoked by an external impact
force, is proposed. With reference to a real door mount system, a discrete, multidegree-
of-freedom, time domain numerical model is developed and solved using
ABAQUS® FE code. An objective function value based on the sound pressure
level transmitted to the driver’s head position is then computed in order to
evaluate the performance of the door mount system. An experimental campaign
was thereafter undertaken to validate the numerical model based on time
response data. The measured data were compared with the predicted values, the
results of which exhibited good correlation.
Keywords: automotive wheel impact analysis, NVH, automotive interior noise.
Keywords
automotive wheel impact analysis, NVH, automotive interior noise.
Related Book
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