Modal Analysis of Car Ceiling Based on NVH Characteristics

DOI

10.2991/meic-14.2014.64How to use a DOI?

Keywords

Noise/Vibration/Harshness (NVH) characteristics; car ceiling; the finite element model; the modal analysis; lightweight

Abstract

In order to research the basic vibration characteristics of automobile, thus enhance the NVH characteristics for the improvement the comfort of occupants. The finite element model of car ceiling has been established and the modal analysis technology has been used , the effect of structural parameters on the ceiling mode has also been studied. Through the computer simulation, two important conclusions can be obtained. First, the increases of ceiling thickness were helpful to reducing vibration and noise, especially reducing low frequency noise inside the car. Second, when substituting the ceiling materials from low carbon steel to aluminum alloy, each order modal frequency slightly increased, but the whole modal vibration mode had no obvious changes, but the structure quality was decreased to about 50% with the reduction of material density, so the appropriate use of aluminum alloy in car ceiling is advantageous to the auto lightweight design, and the detail research should be carried based on the results.

Copyright

© 2014, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Wei Lu
AU  - Jia Yao
AU  - Xiangdong Liu
AU  - Ping Han
AU  - Wanjiang Wu
AU  - Yongfeng Miao
PY  - 2014/11
DA  - 2014/11
TI  - Modal Analysis of Car Ceiling Based on NVH Characteristics
BT  - Proceedings of the 2014 International Conference on Mechatronics, Electronic, Industrial and Control Engineering
PB  - Atlantis Press
SP  - 286
EP  - 289
SN  - 2352-5401
UR  - https://doi.org/10.2991/meic-14.2014.64
DO  - 10.2991/meic-14.2014.64
ID  - Lu2014/11
ER  -