Vehicle/tire performance simulating method

A simulating method for vehicle/tire performances which comprises:

• a tire model preparing step of preparing a tire model of a tire including a ply made out of a finite number of elements;
• a vehicle body model preparing step of preparing a vehicle body model of a vehicle body including suspension members made out of a finite number of elements;
• a vehicle model preparing step of preparing a vehicle model by attaching said tire model to a suspension model of said suspension members in the vehicle body model;
• and
• a simulation step of executing a simulation of traveling of said vehicle model by setting a boundary condition so as to obtain traveling properties and/or a tire property of said vehicle,
• wherein said suspension members are modeled by at least one rigid beam element, at least one linear or non-linear spring element, and at least one torsional beam element;
• wherein said traveling simulation is made by running said vehicle model on a road model of a road surface made out of elements,
• wherein said road model is made out of a rigid element and a snow element for snow provided thereon, and
• wherein traveling properties of said vehicle include an on-the-snow traveling property.

A simulating method for vehicle/tire performances, which comprises:

• a tire model preparing step of preparing a tire model of a tire including a ply made out of a finite number of elements;
• a vehicle body model preparing step of preparing a vehicle body model of a vehicle body including suspension members made out of a finite number of elements;
• a vehicle model preparing step of preparing a vehicle model by attaching said tire model to a suspension model of said suspension members in the vehicle body model;
• and
• a simulation step of executing a simulation of traveling of said vehicle model by setting a boundary condition so as to obtain traveling properties and/or a tire property of said vehicle,
• wherein said suspension members are modeled by at least one rigid beam element, at least one linear or non-linear spring element, and at least one torsional beam element;
• wherein said traveling simulation is made by running said vehicle model on a road model of a road surface made out of elements,
• wherein said road model is made out of a rigid element and a mud element for mud provided thereon, and
• traveling properties of said vehicle include a muddy terrain traveling property.

A simulating method for vehicle/tire performance which comprises:

• a tire model preparing step of preparing a tire model of a tire including a ply made out of a finite number of elements;
• a vehicle body model preparing step of preparing a vehicle body model of a vehicle body including suspension members made out of a finite number of elements;
• a vehicle model preparing step of preparing a vehicle model by attaching said tire model to a suspension model of said suspension members in the vehicle body model;
• and
• a simulation step of executing a simulation of traveling of said vehicle model by setting a boundary condition so as to obtain traveling properties and/or a tire property of said vehicle,
• wherein said suspension members are modeled by at least one rigid beam element, at least one linear or non-linear spring element, and at least one torsional beam element;
• wherein said traveling simulation is made by running said vehicle model on a road model of a road surface made out of elements,
• wherein said road model is made out of a rigid element and a sand element for sand provided thereon, and
• wherein traveling properties of said vehicle include a sandy terrain traveling property.

A simulating method for vehicle/tire performances which comprises:

• a tire model preparing step of preparing a tire model of a tire including a ply made out of a finite number of elements;
• a vehicle body model preparing step of preparing a vehicle body model of a vehicle body including suspension members made out of a finite number of elements;
• a vehicle model preparing step of preparing a vehicle model by attaching said tire model to a suspension model of said suspension members in the vehicle body model;
• and
• a simulation step of executing a simulation of traveling of said vehicle model by setting a boundary condition so as to obtain traveling properties and/or a tire property of said vehicle,
• wherein said suspension members are modeled by at least one rigid beam element, at least one linear or non-linear spring element, and at least one torsional beam element;
• wherein said traveling simulation is made by running said vehicle model on a road model of a road surface made out of elements, wherein said road model comprises an uneven portion, and
• wherein traveling properties of said vehicle include a ride comfort property.

A simulating method for vehicle/tire performances, which comprises:

• a tire model preparing step of preparing a tire model of a tire including a ply made out of a finite number of elements;
• a vehicle body model preparing step of preparing a vehicle body model of a vehicle body including suspension members made out of a finite number of elements;
• a vehicle model preparing step of preparing a vehicle model by attaching said tire model to a suspension model of said suspension members in the vehicle body model;
• and
• a simulation step of executing a simulation of traveling of said vehicle model by setting a boundary condition so as to obtain traveling properties and/or a tire property of said vehicle,
• wherein said suspension members are modeled by at least one rigid beam element, at least one linear or non-linear spring element, and at least one torsional beam element,
• wherein in the simulation step, the vehicle model has an initial speed which is not zero,
• wherein said vehicle body model is provided with a speed corresponding to a translational component of the initial speed and
• wherein said tire model is provided with a speed corresponding to said translational component of the initial speed and a speed corresponding to a rotational component.

A simulating method for vehicle/tire performances, which comprises:

• a tire model preparing step of preparing a tire model of a tire including a ply made out of a finite number of elements;
• a vehicle body model preparing step of preparing a vehicle body model of a vehicle body including suspension members made out of a finite number of elements;
• a vehicle model preparing step of preparing a vehicle model by attaching said tire model to a suspension model of said suspension members in the vehicle body model;
• and
• a simulation step of executing a simulation of traveling of said vehicle model by setting a boundary condition so as to obtain traveling properties and/or a tire property of said vehicle,
• wherein said suspension members are modeled by at least one rigid beam element, at least one linear or non-linear spring element, and at least one torsional beam element
• wherein said traveling simulation includes a steady circling simulation in which steady circling is made with the tire model having a certain fixed steering angle, and
• traveling properties of said vehicle include a steering property estimated by a turning radius of the vehicle model and/or a roll angle of the vehicle model which are obtained from the steady circling simulation.

A simulating method for vehicle/tire performances, which comprises:

• a tire model preparing step of preparing a tire model of a tire including a ply made out of a finite number of elements;
• a vehicle body model preparing step of preparing a vehicle body model of a vehicle body including suspension members made out of a finite number of elements;
• a vehicle model preparing step of preparing a vehicle model by attaching said tire model to a suspension model of said suspension members in the vehicle body model;
• and
• a simulation step of executing a simulation of traveling of said vehicle model by setting a boundary condition so as to obtain traveling properties and/or a tire property of said vehicle,
• wherein said suspension members are modeled by at least one rigid beam element, at least one linear or non-linear spring element, and at least one torsional beam element;
• wherein said traveling simulation includes a lane change simulation in which a lane change state is simulated, and
• wherein traveling properties of said vehicle include a lane change property estimated by a behavior of the vehicle model and/or a convergence of the vehicle model when the steering angle is returned back which are obtained from the lane change simulation.

A simulating method for vehicle/tire performances, which comprises:

• a tire model preparing step of preparing a tire model of a tire including a ply made out of a finite number of elements;
• a vehicle body model preparing step of preparing a vehicle body model of a vehicle body including suspension members made out of a finite number of elements;
• a vehicle model preparing step of preparing a vehicle model by attaching said tire model to a suspension model of said suspension members in the vehicle body model;
• and
• a simulation step of executing a simulation of traveling of said vehicle model by setting a boundary condition so as to obtain traveling properties and/or a tire property of said vehicle;
• wherein said suspension members are modeled by at least one rigid beam element, at least one linear or non-linear spring element, and at least one torsional beam element;
• wherein said traveling simulation includes a driving simulation in which a fixed torque is applied to the tire model and a change in the speed of the vehicle model is observed, and
• wherein traveling properties of said vehicle include a driving force property.