CAJ | 학술논문

传统的推进轴系扭转振动响应计算聚焦于稳态响应，而传递矩阵法、系统矩阵法，可以取得满意的稳态计算结果，但无法处理冰区船舶、海洋工程船舶所遇到的变载荷、变惯量等瞬态工况。为了克服频域扭振计算方法在处理瞬态条件扭振问题的局限性，使用 Newmark 法从时域求解轴系扭转振动微分方程组，基于该算法对某船推进轴系在冰载荷作用下的瞬态响应做了数值计算。其结果表明，在冰载荷冲击下，轴系瞬态扭矩比稳态扭矩大；通过时频分析，在冰载荷作用期间，出现了明显的螺旋桨叶频激励，因此须避免冰载荷激励产生轴系扭转振动的叶次共振。 Newmark 法扭振计算结果与实船测试结果对比表明，该方法在稳态响应计算和时域曲线上都与实际测量结果基本一致，具有工程实用性。
전통적추진축계뉴전진동향응계산취초우은태향응，이전체구진법、계통구진법，가이취득만의적은태계산결과，단무법처리빙구선박、해양공정선박소우도적변재하、변관량등순태공황。위료극복빈역뉴진계산방법재처리순태조건뉴진문제적국한성，사용 Newmark 법종시역구해축계뉴전진동미분방정조，기우해산법대모선추진축계재빙재하작용하적순태향응주료수치계산。기결과표명，재빙재하충격하，축계순태뉴구비은태뉴구대；통과시빈분석，재빙재하작용기간，출현료명현적라선장협빈격려，인차수피면빙재하격려산생축계뉴전진동적협차공진。 Newmark 법뉴진계산결과여실선측시결과대비표명，해방법재은태향응계산화시역곡선상도여실제측량결과기본일치，구유공정실용성。
The conventional torsional vibration calculation for ship propulsion system concentrates on the response of steady state. And the transfer matrix method and system matrix method, could get a good result of steady response. But these methods can not solve the momentary problem for ship navigation in ice and engineering ship. By employing the Newmark method to solve the torsional vibration equation in time do-main, the result was gotten for the propulsion shaft with ice impact torque on propeller. During the ice im-pact, the transient torque is bigger than steady torque and the blade frequency exciting component was found by time-frequency analysis. Avoiding blade number order resonance of ice impact is necessary. The com-parison between Newmark method result and measurement shows that Newmark method is practicable for the response of steady state and time domain curve, which results are basically the same as the measure-ment result.