B. Sakhaei, M. Durali,
Volume 3, Issue 4 (12-2013)
Abstract
By new advancements in vehicle manufacturing vehicle quality evaluation and assurance has become a
more critical issue. In present work, the vibration transfer path analysis and vibration path ranking of a car
interior has been performed. The method is similar to classical multilevel TPA methods but has distinct
differences. The method is named VIVS which stands for Vehicle Interior Vibration Simulation.
Performance of some tests like chassis dyno test, virtual mass function test and body transfer function test
are required in this approach. The accelerations on both sides of the engine mounts are measured on chassis
dyno by which the virtual mass and body transfer functions are measured at engine mounts. Using the
concept of multilevel TPA, the vibration share from each path is calculated. The overall vibration
magnitude at target point is calculated by summing the shares. Path ranking can be done by having the
share of each path from overall vibration magnitude. Using this method on a sample vehicle, some
modification has been proposed to decrease the vibration at target point, and the side effect of the
modifications on the powertrain dynamic behavior has been evaluated. The proposed method needs less
analysis time than classical TPA methods and its ability in optimization of vibration magnitude at target
points is proven.
