Automotive Concept Modelling: Optimization of the Vehicle NVH Performance

  • Naser NasrolahzadehEmail author
  • Mohammad Fard
  • Milad Tatari
  • Mohammad Mahjoob
Conference paper
Part of the Lecture Notes in Electrical Engineering book series (LNEE, volume 201)


The NVH optimization of the BIW and seat structure in the advanced phase of the design demands too much time and cost. On the other hand, developing a reliable NVH concept model in the earliest stage of the design to improve dynamic behaviour of the structure and avoid conflicting designs might be an effective approach. To this end, a practical method for CAE-NVH concept modelling is developed. The developed model utilizes beam elements with standard and arbitrary cross sections for the main load carrying components (namely beam-like structures) of the BIW and seat structure. Also, major joints are approximated from the detailed CAE model by taking static model reduction method into account. Due to the indisputable effects of some panels (e.g., roof) on the BIW structural dynamics characteristics, shell element with rough meshing are exploited to model these components. The developed concept models are verified by comparing their resonant frequencies and mode shapes with counterpart advanced CAE models in low frequency range. Having been validated by dynamic domain indicators, the developed concept model is used to improve the NVH performance of the automotive. In one case, modes interaction between BIW and seat structure is characterized. Then, by examining the influence of the beams properties (both BIW and seat) in conflicting modes, the problem is managed. Having been separated the identified interacting modes, the amplitude of the vibration on the seat-back is suppressed about 10 db around corresponding frequency. As a result, by taking advantages of the proposed method in similar cases, the CAE-NVH concept model can be successfully used to lead the right first time design.


Advanced CAE model Concept modelling Modes management NVH performance Vibration suppression 


  1. 1.
    Lee S et al (2007) Integrated process for structural-topological configuration design of weight-reduced vehicle components. Finite Elem Anal Des 43:620–629CrossRefGoogle Scholar
  2. 2.
    Reed C (2002) Applications of optistruct optimization to body in white design. In: Proceedings of Altair engineering event, CoventryGoogle Scholar
  3. 3.
    Wang L et al (2004) Automobile body reinforcement by finite element optimization. Finite Elem Anal Des 40:879–893CrossRefGoogle Scholar
  4. 4.
    Chapman CB, Pinfold M (2001) The application of a knowledge based engineering approach to the rapid design and analysis of an automotive structure. Adv Eng Softw 32:903–912zbMATHCrossRefGoogle Scholar
  5. 5.
    Fard M (2011) Structural dynamics characterization of the vehicle seat for NVH performance analysisGoogle Scholar
  6. 6.
    Sung SH, Nefske DJ (2001) Assessment of a vehicle concept finite-element model for predicting structural vibration, SAE noise and vibration conference and exposition, 30 April–3 May, Traverse City, MichiganGoogle Scholar
  7. 7.
    Lee S et al (2002) Numerical approximation of vehicle joint stiffness by using response surface method. Int J Autom Technol 3:117–122Google Scholar
  8. 8.
    Donders S et al (2009) A reduced beam and joint concept modeling approach to optimize global vehicle body dynamics. Finite Elem Anal Des 45:439–455CrossRefGoogle Scholar
  9. 9.
    Mundo D et al (2009) Simplified modelling of joints and beam-like structures for BIW optimization in a concept phase of the vehicle design process. Finite Elem Anal Des 45:456–462CrossRefGoogle Scholar
  10. 10.
    Mundo D et al. (2010) Concept modelling of automotive beams, joints and panels. April 20–22Google Scholar
  11. 11.
    Van Niekerk J et al (2003) The use of seat effective amplitude transmissibility (SEAT) values to predict dynamic seat comfort. J Sound Vib 260:867–888CrossRefGoogle Scholar
  12. 12.
    Liu X, Wagner J (2002) Design of a vibration isolation actuator for automotive seating systems-Part I: modelling and passive isolator performance. Int J Veh Des 29:335–356CrossRefGoogle Scholar
  13. 13.
    Liu X, Wagner J (2002) Design of a vibration isolation actuator for automotive seating systems-Part II: controller design and actuator performance. Int J Veh Des 29:357–375CrossRefGoogle Scholar
  14. 14.
    Gundogdu O (2007) Optimal seat and suspension design for a quarter car with driver model using genetic algorithms. Int J Ind Ergon 37:327–332CrossRefGoogle Scholar
  15. 15.
    Nasrolahzadeh N et al. (2012)Automotive NVH performance characterization using concept modellingGoogle Scholar
  16. 16.
    Nastran MD (2010) R3 quick reference guide. Msc. software corporation, USAGoogle Scholar
  17. 17.
    Guyan RJ (1965) Reduction of stiffness and mass matrices. AIAA J 3:380CrossRefGoogle Scholar
  18. 18.
    Craig RR, Bampton MCC (1968) Coupling of substructures for dynamic analyses. AIAA J 6(7):1313–1319zbMATHCrossRefGoogle Scholar
  19. 19.
    Ewins DJ (2000) Modal testing: theory, practice and application. Research Studies Press Ltd, BaldockGoogle Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 2013

Authors and Affiliations

  • Naser Nasrolahzadeh
    • 1
    Email author
  • Mohammad Fard
    • 2
  • Milad Tatari
    • 1
  • Mohammad Mahjoob
    • 1
  1. 1.School of Mechanical Engineering, College of EngineeringUniversity of TehranTehranIran
  2. 2.School of Aerospace, Mechanical and Manufacturing EngineeringRMIT UniversityMelbourneAustralia

Personalised recommendations