| 引用本文: | 孙小帅,姚朝帮,叶青.小水线面双体船横摇阻尼特性数值与试验研究.[J].国防科技大学学报,2017,39(6):71-78,142.[点击复制] |
| SUN Xiaoshuai,YAO Chaobang,YE Qing.Numerical and experimental investigation on roll damping of small waterplane area twin hull[J].Journal of National University of Defense Technology,2017,39(6):71-78,142[点击复制] |
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| 小水线面双体船横摇阻尼特性数值与试验研究 |
| 孙小帅, 姚朝帮, 叶青 |
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(海军工程大学 舰船工程系， 湖北 武汉 430033)
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| 摘要: |
| 针对安装稳定鳍的小水线面双体船开展了零速静水自由横摇衰减数值与试验研究。通过不确定度分析验证数值计算方法的可靠性，进而对比船体的线性横摇阻尼和非线性横摇阻尼，并分析摩擦阻尼和稳定鳍对小水线面双体船横摇恢复力矩的影响规律。结果表明：由数值计算求得的自由横摇衰减曲线与试验结果吻合良好；在线性横摇运动假设下，线性横摇阻尼系数随着初始横倾角的增加而增大；将通过数值计算求得的非线性阻尼系数代入到非线性横摇运动方程中能准确地模拟船体的自由横摇衰减运动；摩擦阻尼和稳定鳍对小水线面双体船零速静水自由横摇时的横摇恢复力矩贡献很小。 |
| 关键词: 小水线面双体船 横摇阻尼 自由横摇衰减 |
| DOI：10.11887/j.cn.201706012 |
| 投稿日期：2016-07-13 |
| 基金项目:国家自然科学基金资助项目（50879090，51509256）；水动力重点基金资助项目（9140A1403071251311044） |
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| Numerical and experimental investigation on roll damping of small waterplane area twin hull |
| SUN Xiaoshuai, YAO Chaobang, YE Qing |
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(Department of Naval Architecture Engineering, Naval University of Engineering, Wuhan 430033, China)
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| Abstract: |
| A SWATH (small waterplane area twin hull) installed with stabilizing fins rolling freely in calm water was investigated by both numerical approach and experimental method. Uncertainty analysis was made to verify and validate the numerical method. Both linear roll damping and nonlinear roll damping were obtained and the contributions of the frictional damping and the stabilizing fins to the roll restoring moment were analyzed. The results illustrate that: the numerical free roll decay curve agrees well with the experiment; under the assumption of linear roll mode, the linear roll damping coefficient sees an upward trend with the increase of initial heel angle; the computed free roll decay curves using nonlinear damping coefficients agree well with the experimental results; the frictional damping and the stabilizing fins make minimal contributions to the roll restoring moment for the free roll decay motion in still water. |
| Keywords: small waterplane area twin hull roll damping free roll decay |
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