Improving the dynamic characteristics of body-in-white structure using structural optimization

Aizzat S. Yahaya Rashid, Rahizar Ramli, Sallehuddin Mohamed Haris, Anuar Alias

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

The dynamic behavior of a body-in-white (BIW) structure has significant influence on the noise, vibration, and harshness (NVH) and crashworthiness of a car. Therefore, by improving the dynamic characteristics of BIW, problems and failures associated with resonance and fatigue can be prevented. The design objectives attempt to improve the existing torsion and bending modes by using structural optimization subjected to dynamic load without compromising other factors such as mass and stiffness of the structure. The natural frequency of the design was modified by identifying and reinforcing the structure at critical locations. These crucial points are first identified by topology optimization using mass and natural frequencies as the design variables. The individual components obtained from the analysis go through a size optimization step to find their target thickness of the structure. The thickness of affected regions of the components will be modified according to the analysis. The results of both optimization steps suggest several design modifications to achieve the target vibration specifications without compromising the stiffness of the structure. A method of combining both optimization approaches is proposed to improve the design modification process.

Original languageEnglish
Article number190214
JournalScientific World Journal
Volume2014
DOIs
Publication statusPublished - 2014

Fingerprint

Structural optimization
Vibration
Fatigue
Noise
stiffness
Natural frequencies
vibration
Stiffness
Crashworthiness
torsion
Shape optimization
Dynamic loads
fatigue
Torsional stress
topology
automobile
Railroad cars
Fatigue of materials
Specifications
analysis

ASJC Scopus subject areas

  • Biochemistry, Genetics and Molecular Biology(all)
  • Environmental Science(all)
  • Medicine(all)

Cite this

Improving the dynamic characteristics of body-in-white structure using structural optimization. / Yahaya Rashid, Aizzat S.; Ramli, Rahizar; Mohamed Haris, Sallehuddin; Alias, Anuar.

In: Scientific World Journal, Vol. 2014, 190214, 2014.

Research output: Contribution to journalArticle

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