The invention provides a high-precision
dynamic simulation method and
system suitable for a special vehicle in a complex environment, and the method comprises the steps: constructing a multi-
body system dynamic model which comprises a cabin body, a suspension, a tire and ground
coupling relation, and describing the
pose and motion state of each part through an absolute node coordinate method; establishing a three-dimensional complex
terrain model containing an E-level random pavement, a convex obstacle and a side-tipping ramp, and taking the three-dimensional complex
terrain model as external excitation input; the three-dimensional complex
terrain model is coupled with the multi-
body system dynamics model, a tire-ground nonlinear
contact system is constructed, and tire-ground interaction force is calculated in real time; constructing a discrete
solver of a vehicle
system dynamics equation set based on a pungent integral
algorithm, and realizing time integration and evolution of a
system state through numerical iteration; and outputting dynamic
response parameters of the vehicle in a complex environment, including acceleration, speed and displacement of a cabin
mass center, suspension
contact force and tire
impact load, for cabin structure strength analysis and comfort evaluation.