CAJ | 학술논문

基于粘性流理论建立了三维数值波浪水池，生成了高精度的ITTC谱和白噪声波谱的长峰不规则波，通过同时求解描述船舶流场的RANS方程和刚体运动学方程，结合网格整体移动方法，实现了船模不规则波中顶浪运动的数值模拟，给出了DTMB5512船模不规则波中顶浪纵摇和垂荡运动时历，并通过频谱分析得到了纵摇和垂荡的频率响应函数，与势流理论计算结果及IIHR船模水池试验数据进行了比对，均吻合良好，证明了文中方法研究船舶耐波性问题的可行性。
기우점성류이론건립료삼유수치파랑수지，생성료고정도적ITTC보화백조성파보적장봉불규칙파，통과동시구해묘술선박류장적RANS방정화강체운동학방정，결합망격정체이동방법，실현료선모불규칙파중정랑운동적수치모의，급출료DTMB5512선모불규칙파중정랑종요화수탕운동시력，병통과빈보분석득도료종요화수탕적빈솔향응함수，여세류이론계산결과급IIHR선모수지시험수거진행료비대，균문합량호，증명료문중방법연구선박내파성문제적가행성。
A computational fluid dynamics simulation method was developed to establish a 3D viscous nu-merical wave tank (NWT), and high precision irregular waves of ITTC spectrum and white noise spectrum were generated. The problem of surface ship free motion in irregular head waves is predicted by solving the Reynolds Averaged Navier-Stokes (RANS) equations describing the flow around ship and the kinematics equation of rigid body simultaneously, and the moving grid method was used, which let all grids moving together according to the calculation results in each time step. The pitch and heave transfer functions for ship model DTMB5512 in irregular wave were obtained. The simulation results are examined by the com-parisons with strip theoretical results and experimental data from IIHR, and show good agreement, which demonstrates the ability of the present method to assess seakeeping characteristics.