Abstract:
A versatile computer package, to evaluate ground vehicle ride
comfort has been designed. Wheeled, tracked, and semitracked vehicles
have been modelled. The emphasis has been placed upon the tracked vehicle suspension systems with the neatly ”standard" torsion bar
arrangement operating with either telescopic or rotary-vane dampers.
Substantial investigation of the four-bar linkage, associated with the
rotary-vane damper, has been carried out and is presented here.The
package includes linear ,nonlinear ,[2-V) ,and I3-Vj vehicle models.
A new technique employing the finite element method (FEM) fat
suspension system modelling has been developed.
Several methods of numerical integration are available in the
package .A new evident scheme based on a hypetosculatory Hermitian
weighted residual of the second order for the solution of the system
of differential equations which simulate the vehicle has been derived.
Whenever necessary the error developed during the integration process
was limited. The graphic display facility of digital computers has been
used extensively in the present code. As an example, the damped eigen-value problem has been solved graphically. The graphical solution is
simple, direct, and tellable compared to the analytical solution.
The terrain configuration might be of either harmonic or atbitrary
shape function.
Two tolerence critetia have been employed fat tide comfort
evaluation ,namely, the absorbed power critetion and the international
standard organization ISO 2631 critetion.The two critetia are fully
integrated into the package and operate automatically.
All individual subroutines have been tested successfully for the
purpose intended. Complete sectors have been validated by running
various case studies. The results obtained from the package agree
reasonably well with the analytical or experimental results.
The package allows updating in response to new vehicle and
vehicle-terrain technology and can be run on both time-skating or
batch processing computer machines. The main package structute is
independent of computer type.
