In this paper the authors have proposed a virtual method that can be used to objectively evaluate the vibrational comfort during normal ride with a motorcycle using a detailed three-dimensional virtual rider in the multibody modeling and simulation environment LMS Virtual.Lab Motion. In the analysis virtual human models of able-bodied riders in different riding postures and of people with different disabilities have been considered. Frequency weighted RMS (Root Mean Square) and VDV (Vibration Dose Value) have been used to assess the vibrational comfort level of the motorcycle considering the frequency range from 4 Hz to 10 Hz to be the most critical. The RMS and VDV values have been used as relative indicators for comparison between the scenarios, which has indicated a strong dependency on the configuration of the rider-motorcycle system. The results obtained highlight the impact of the rider posture and disabilities on the vibrational comfort level of the motorcycle. A more erect posture causes the body to become stiffer in the vertical direction and therefore tends to increase the RMS and VDV values decreasing the vibrational comfort level. The configuration of the arms (position and angle) and of the back has the highest influence on the vibrational comfort of a motorcycle. It has been shown that the legs have a low influence on comfort, because they provide less support of the body at the footrest as compared to the saddle and handle bar and due to good elastic properties at the saddle contact at thighs and buttocks. The results reported in this paper underline the importance of the rider posture with respect to vibrational comfort of the motorcycle. This fact should be taken into consideration when designing a motorcycle suspension such that the normal riding posture and the corresponding saddle, handlebar and footrest positions provide a configuration in which the frequency transfer from the road to the rider is minimal.


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    Titel :

    Multibody simulation with a virtual dummy for motorcycle vibration comfort assessment


    Beteiligte:
    Erdelyi, H. (Autor:in) / Kirchner, M. (Autor:in) / Manzato, S. (Autor:in) / Donders, S. (Autor:in)


    Erscheinungsdatum :

    2012


    Format / Umfang :

    14 Seiten, 12 Bilder, 4 Tabellen, 19 Quellen



    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




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