연약지반 직렬 무한궤도 주행차량의 동적 거동 해석 프로그램 개발

Abstract

This paper concerns about development of dynamic analysis model for a tandem tracked vehicle crawling on extremely cohesive soil. The tandem tracked vehicle is assumed as a rigid body with 6 degree of freedom. Track subsystems are included in chassis. Track force is assumed as external force. Extremely cohesive soft soil is modeled in form of relationships: normal pressure to static sinkage, shear stress to shear displacement, and dynamic sinkage to shear displacement. Equation of motion of tracked vehicle are derived with respect to the body-fixed coordinate frame. In order to investigate dynamic responses of tandem tracked vehicle, Newmark's method is employed by means of incremental-iterative algorithm. A nonlinear dynamic analysis program is developed in FORTRAN 90.