This content is not included in your SAE MOBILUS subscription, or you are not logged in.
A NVH CAE approach performed on a vehicle closures pumping issue
ISSN: 0148-7191, e-ISSN: 2688-3627
Published September 03, 2018 by SAE International in United States
Annotation ability available
The use of finite element modeling (FEM) tools is part of the most of the current product development projects of the automotive industry companies, replacing an important part of the physical tests with lower costs, higher speed and with increasing accuracy by each day. In addition to this, computer-aided engineering (CAE) tools can be either used after the product is released, at any moment of the product life, in many different situation as a new feature release, to validate a more cost-efficient design proposal or to help on solving some manufacturing problem or even a vehicular field issue. Different from the phase where the product is still under development, when standard virtual test procedures are performed in order to validate the vehicle project, in this case, where engineers expertise plays a very important role, before to proceed with any standard test it is fundamental to understand the physics of the phenomena that is causing the unexpected behavior. This understanding will make possible to find the problem root cause, allowing to virtually testing a wide number of different solutions in a short time. In this paper a vibrational transfer function (VTF) simulation is used on a trimmed body FEM model to identify the root cause of a liftgate pumping issue, caused by a high relative displacement between the body frame and the belt line liftgate area, under a singular track excitation condition, that can be physically noticed and measured, but only deeply understood and properly fixed together with the use of FEM analysis.
CitationMartins, L. and Junior, D., "A NVH CAE approach performed on a vehicle closures pumping issue," SAE Technical Paper 2018-36-0287, 2018, https://doi.org/10.4271/2018-36-0287.
- The Oxford Dictionary of English, 3rd ed., “Transfer function”.
- A. E. Duncan, et. al., “Understanding NVH Basics”, IBEC, 1996.
- Newsbytes.com by Susan M (25 Oct 2001), “NASA Releases Classic Software To Public Domain”.
- https://www.revolvy.com/main/index.php?s=NX%20Nast ran&it em_type=topic, “NX Nast ran”.
- B. Dong, G. M. Goetchius, et al., “Process to Achieve NVH Goals: Subsystem Targets via “ Digital Prototype” Simulations”, SAE 1999-01-1692.
- M. J. Griffin, “Handbook of Human Vibration”, 1990 by Academic Press Limited.
- Mechanical Vibration and Shock - Evaluation of human exposure to whole-body vibration. ISO 2631-1:1997.