NDLI: DAViD - A MULTIBODY CODE TO SIMULATE A DYNAMIC VIRTUAL DUMMY FOR VIBRATIONAL COMFORT ANALYSIS OF CAR OCCUPANTS

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DAViD - A MULTIBODY CODE TO SIMULATE A DYNAMIC VIRTUAL DUMMY FOR VIBRATIONAL COMFORT ANALYSIS OF CAR OCCUPANTS

Content Provider	Semantic Scholar
Author	Valentini, Pier Paolo Vita, Leonardo
Copyright Year	2002
Abstract	The development of virtual simulators can avoid to set-up expensive test rigs, time-consuming tests, and is a winning strategy to be more competitive in road-vehicles market. Moreover vibrational comfort analysis is an important topic in vehicle design and the possibility to perform virtual vibrational tests on the effects of changing some parameters is useful tool for the designer. A literature search reveals that most of the simulation models in the field are based on elementary linear models. In some cases, finite elements are used, but this approach involves a large amount of parameters to be defined and managed. Thus the authors of this paper developed a virtual dummy model by means of multibody techniques. The formulation is the one described in Haugh’s text book [4]. The code, named DAViD (the acronym of Dynamic Automotive Virtual Dummy), can mimic the non linear behaviour of a 3D human body model and requires a very small set of body data. The model is completely parametric and can be automatically scaled to simulate a significant portion of population. The code can be also linked to experimental results of accelerometers time histories to perform multi-input analysis based on seat input (translational and rotational), steer wheel input and pedals input. Driver and occupants can be both simulated. It is possible to introduce non linear viscoelastic parameters to match the actual behaviour of cushion foams used in the manufacturing of seats. The model provides also an assessment of vibrational comfort computed in compliance with international standards. The results of the code DAViD have been compared with experimental ones acquired on a vibrational test rig.
File Format	PDF HTM / HTML
Alternate Webpage(s)	http://www.ingegneriameccanica.org/papers/NATOASI.pdf
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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