Method of generating two-wheeled vehicle dummy model and apparatus for performing a collision simulation of a two-wheeled vehicle

Abstract

A method of and an apparatus for performing a collision simulation on a two-wheeled vehicle using a virtual model of a dummy developed for use on four-wheeled vehicles.

1 . A method of performing a collision simulation of a two-wheeled vehicle in a virtual three-dimensional space constructed on a computer using a virtual model of a dummy for a four wheeled vehicle comprising the steps of: 
 generating a dummy model for two-wheeled vehicles by combining a dummy model simulating a dummy with shell elements covering openings thereof;    setting various test conditions including a contact condition for an FEM model of the dummy model for two-wheeled vehicles; and    performing a collision simulation on said FEM model.    
   
   
       2 . A method of performing a collision simulation according to  claim 1 , wherein said openings correspond to openings formed in joints of the dummy for keeping movable ranges of the joints.  
   
   
       3 . A collision simulation apparatus for performing a collision simulation of a two-wheeled vehicle dummy model in a virtual three-dimensional space constructed on a computer using a virtual model of a four-wheeled vehicle dummy comprising: 
 memory means for storing a dummy model simulating a dummy;    means for generating shell elements covering openings of the dummy;    means for generating a dummy model for two-wheeled vehicles by combining the openings of the dummy with said shell elements;    means for setting various test conditions including a contact condition for an FEM model of the dummy model for two-wheeled vehicles; and    means for performing a collision simulation on said FEM model.    
   
   
       4 . A method of generating a two-wheeled vehicle dummy model as a two-wheeled vehicle FEM model based on an FEM model of a four-wheeled vehicle dummy comprising the steps of: 
 extracting regions of mutual interference caused when the FEM model of the four-wheeled vehicle dummy takes a riding posture on a two-wheeled vehicle; and    producing a contact definition with respect to elements which cause mutual contact while a simulation is being performed wherein no contact definition is produced with respect to elements of said regions of mutual interference.    
   
   
       5 . A method of generating a two-wheeled vehicle dummy model as a two-wheeled vehicle FEM model based on an FEM model of a four-wheeled vehicle dummy comprising the steps of: 
 extracting regions of mutual interference caused when the FEM model of the four-wheeled vehicle dummy takes a riding posture on a two-wheeled vehicle; and    correcting elements of the regions of mutual interference so as to avoid said interference.    
   
   
       6 . The method of generating a two-wheeled vehicle dummy model according to  claim 5  wherein the elements of the regions of mutual interference are deleted in said correcting step.  
   
   
       7 . The method of generating a two-wheeled vehicle dummy model according to  claim 5 , wherein that the elements of the regions of mutual interference are deformed in said correcting step.  
   
   
       8 . A collision simulation apparatus for performing a collision simulation of a two-wheeled vehicle dummy model in a virtual three-dimensional space constructed on a computer using a FEM model of a four-wheeled vehicle dummy comprising: 
 memory means for storing a dummy model simulating a dummy;    means for extracting regions of mutual interference caused when the FEM model of the four-wheeled vehicle dummy takes a riding posture on a two-wheeled vehicle;    means producing a contact definition with respect to elements which cause mutual contact while a simulation is being performed wherein no contact definition is produced with respect to elements of the regions of mutual interference; and    means for performing a collision simulation on said FEM model.    
   
   
       9 . A method of performing a collision simulation of a two-wheeled vehicle in a virtual three-dimensional space constructed on a computer using a FEM model of a four wheeled vehicle dummy comprising the steps of: 
 generating a dummy model for two-wheeled vehicles by combining a dummy model simulating a dummy with shell elements covering openings thereof;    extracting regions of mutual interference caused when the FEM model of the four-wheeled vehicle dummy takes a riding posture on a two-wheeled vehicle;    producing a contact definition with respect to elements which cause mutual contact while a simulation is being performed wherein no contact definition is produced with respect to elements of said regions of mutual interference;    setting various test conditions including a contact condition for the FEM model of the dummy model for two-wheeled vehicles; and    performing a collision simulation on said FEM model.