Dynamic Analogies About Stiffness Matrix And Kinematics Of Rigidbody Systems

Stiffness Matrix is the foundation about analyses of structural mechanics and finite element, a weighted object can be Divide into lots of elements, all the elements Stiffness Matrix can concentrate into a General Stiffness Matrix through two steps: first make the single Stiffness Matrix [ k ] expand to the order of general Stiffness Matrix, then can make the single Stiffness Matrix Add together. Second, put the single Stiffness Matrix in a certain place of general Stiffness Matrix, and its significance is that the single Stiffness Matrix contribution to the general Stiffness Matrix. Through this transform , we can get the general Stiffness Matrix. The general Stiffness Matrix's physical meaning is equilibrium equation of every node, the differences to the single element is that the structure is the ensemble of the elements, every unit all plays a certain role to the structure. The purpose of this article to illustrate the process of that how the general stiffness matrix forms from the element stiffness Matrix.This paper also present the conventional analysis method and computer simulation to the Kinematics of Rigid body Systems at the same time ,and mainly introduce the analysis basal principle and method comply with the time varying process such as speed and acceleration of every rigid body's place, place changes. Kinematics computer-aid analysis process is introduced finally taking the Dynamic analogies of Kinematics of Rigidbody Systems as the example.