Comfort assessment of motorcycle saddles: a methodology based on virtual prototypes

This paper illustrates a research work carried out in order to allow a comfort-oriented optimization of motorcycle saddles. The aim of the work is to develop a numerical tool (CAD/FEM) to assist the designer willing to take comfort into account as a primary requirement for saddle design. This paper briefly illustrates the basic steps of the methodology. The authors, after obtaining a set of parametric CAD models of both saddle and rider, simulated the contact occurring between these components by means of a FE solver, thereby obtaining a comfort level estimate. The results, validated by a set of experimental tests, can be used both to evaluate the comfort level of an existing saddle and to improve the saddle design. The work demonstrated the feasibility of the proposed approach, capable of providing useful hints for a comfort-oriented design, already from the early stage of stylistic design of motorcycle saddles and, possibly, of other products.

[1]  H. T. E. Hertzberg,et al.  The Human Buttocks in Sitting: Pressures, Patterns, and Palliatives , 1972 .

[2]  A. Burstein,et al.  The elastic modulus for bone. , 1974, Journal of biomechanics.

[3]  S. Habsburg,et al.  What Really Connects in Seating Comfort?-Studies of Correlates of Static Seat Comfort , 1977 .

[4]  Mm Muriëlle Verver,et al.  Numerical tools for comfort analyses of automotive seating , 2004 .

[5]  Thacker Jg,et al.  Three-dimensional computer model of the human buttocks, in vivo , 1994 .

[6]  M J Griffin,et al.  Factors affecting static seat cushion comfort , 2001, Ergonomics.

[7]  Masaaki Katsumata,et al.  Evaluation of Seating Comfort , 1982 .

[8]  P. Branton Behaviour, body mechanics and discomfort. , 1969, Ergonomics.

[9]  L Q Zhao,et al.  STUDY OF SITTING COMFORT OF AUTOMOTIVE SEATS , 1994 .

[10]  Wenqi Shen,et al.  Validity and reliability of rating scales for seated pressure discomfort , 1997 .

[11]  B. Shackel,et al.  The assessment of chair comfort. , 1969, Ergonomics.

[12]  R. Cailliet,et al.  Low Back Pain Syndrome , 1963 .

[13]  V K Tewari,et al.  Optimum seat pan and back-rest parameters for a comfortable tractor seat , 2000, Ergonomics.

[14]  Kuntal Thakurta,et al.  Evaluating Short and Long Term Seating Comfort , 1995 .

[15]  Se Jin Park,et al.  The Evaluation of Seating Comfort by the Objective Measures , 1997 .

[16]  Colin G. Drury,et al.  AN ERGONOMIC EVALUATION OF OFFICE CHAIRS , 1987 .

[17]  P A Dabnichki,et al.  Deformation and Stress Analysis of Supported Buttock Contact , 1994 .

[18]  A C Mandal,et al.  The seated man (Homo Sedens) the seated work position. Theory and practice. , 1981, Applied ergonomics.

[19]  B. Bates Scientific Basis of Human Movement , 1977 .