Breakwater is one of the most important coastal structure in port. The principal function of a breakwater is obviously to prevent the penetration of incident waves into a harbor. Wave transmission effected by the shape of breakwater and many research carried out using numerical modeling, However hydraulic model experiment is rarely performed. Therefore in this study, hydraulic model experiment carried out to investigate wave height distribution characteristics by shape of breakwater head.

Geometric shape morphing is a special geometric operation that interpolates two geometric shapes to generate in-between shapes, which can be used in various design applications such as pipe-like surface design or motion simulation in CAD/CAM. It has been well known that Minkowski sum can be used to design collision-free motion path and to modify geometric shapes. Recently, we developed a geometric modeling technique to interactively control geometric shape morphing based on Minkowski sum. The basic idea develops from the linear interpolation on two geometric shapes where the traditional algebraic sum is replaced by Minkowski sum. We extended this scheme into n-th degree B？zier and blossom control with multiple control shapes. In this paper, we introduce mathematical models of the proposed control structure and some of their properties. Moreover, we present a fast and efficient computation method based on direction map analysis, which has been optimized for repeated generation of in-betweens to outperform previous algorithms.

스위프 기하학적 모델은 곡선, 면 또는 입방체를 주어진 경로를 따라 이동시킴으로써 기하학적 모델을 생성하는 기법이다. 따라서 스위핑을 사용하면 프리즘 쉘의 곡면을 쉽게 정의할 수 있다. 본 논문은 스위프 기하학적 모델을 프리즘 쉘의 최적화에 적용하는 절차에 대하여 기술하였다. 제시한 스위프 기하학적 모델을 유한요소법과 융합하였고 프리즘 쉘의 반응을 계산하기 위해 9절점 퇴화쉘요소를 채용하였다. 본 연구에서 제시한 최적화과정을 증명하기 위하여 수치예제를 풀어 보았다. 수치예제를 통하여 제시한 스위프 기하학적 모델이 많은 종류의 프리즘 쉘을 최적화하는데 효율적이고 신뢰적인 방법인 것으로 나타났다.