수중세장체 접촉거동 해석 1. 접촉 알고리듬

Abstract

Dynamic analysis of a slender structure is often involved with contacts among bodies. This paper presents an efficient and general contact search algorithm for dynamics in the context of the compliance contact model. A boundary box of a defense surface geometry is divided into many blocks. A contact reference frame is defined on the defense body of a contact pair. Since all geometric variables necessary to detect a contact are measured relative to the contact reference frame attached to the defense body, the variables belonging to the defense body are constant, which significantly reduces computation time associated with the contact search. Therefore, the contact reference frame plays a key role in developing an efficient contact search algorithm. A global detecting method that a bounding box is divided into several pieces in global coordinate system is presented in this paper. The method has an advantage that the number of contacting searching can be smaller than other methods for a system. An example is presented to show the validity of the proposed method.