A Study on a Dynamic Radar Cross Section Analysis Technique for a Surface Warship

J. Ocean Eng. Technol. 2009;23(6):77-81.

Kim Kook-Hyun,Kim Jin-Hyeong,Choi Tae-Muk,Kim Yun-Hwan,Cho Dae-Seung

Dept. of Naval Architecture Tongmyong University,Createch Co. Ltd.,Createch Co. Ltd.,Dept. of Naval Architecture and Ocean Engineering Pusan National University,Dept. of Naval Architecture and Ocean Engineering Pusan National University

수상함의 동적 레이더 반사면적 해석 기법 연구

김국현,김진형,최태묵,김윤환,조대승

동명대학교 조선공학과,(주)크리에이텍,(주)크리에이텍,부산대학교 조선해양공학과,부산대학교 조선해양공학과

Keywords: Dynamic radar cross section, Ship motion, Quasi-stationary method

핵심용어: 동적 레이더 반사면적, 선체 운동, 준 정적 방법

Abstract

The radar cross section (RCS) of a warship is one of the most important design features in terms of her survivability in hostile environments. Ocean waves continuously changes the attitude of an objective warship to hostile radar and distorts the RCS as a result. This paper presents a dynamic RCS analysis technique and procedure that considers temporal ship motion. First, data sets are prepared for ship motions in 6 degrees of freedom, which are numerically simulated for an objective warship via frequency to time domain conversion with response amplitude operators and specified ocean wave spectra. Second, a series of RCS analysis models are transformed geometrically by referring to ship motion data sets. Finally, temporal RCS analyses are carried out with the RCS simulation code, SYSCOS. As an example, RCS analysis results are given for a virtual warship, which show that ship motions temporally change RCS values and cause RCS reduction compared with static value in terms of mean values.