Study on Transom Stern Form Design Method Based on a New Theory

基于新理论的艉艉船尾造型设计方法研究

• 批准号: 14550861
• 负责人: YAMANO Tadao
• 金额: $ 2.56万
• 依托单位: Hyogo University of Teacher Education
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2002
• 资助国家: 日本
• 起止时间: 2002 至 2003
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-14550861/
• 关键词: Transom stern bottom profile form; Stern wave resistance; Model test; Real stern end immersion; Acceleration of water flow at stern end; Forward-oriented wave breaking just behind a transom stern; Design method of Transom stern form; トランサム船尾船底側面形状

1.Effect of Transom Stern Bottom Profile Form on Stern Wave Resistance(1)Effect of the transom stern bottom profile form:The concave stern bottom profile causes the lowest stern wave resistance at the lower ship speed range of F_<rI><3.1. The flat stern bottom profile causes the smallest stern wave resistance at the higher ship speed range of F_<rI>>3.1.(2)Relation between Stern Bottom Profile Form and Stern Wave Resistance:-At the lower ship speed rage of F_<rI><3.1, the stern bottom profile form controls the stern wave resistance mainly by controlling the real stern end immersion I_r.-At the higher ship speed range of F_<rI>>3.1, the stern bottom profile form controls the stern wave resistance mainly by controlling the remaining following wave height.-The concave stern bottom profile causes the smallest real stern end immersion I_r which is important at the lower ship speed range. The flat stern bottom profile causes the lowest remaining following wave height which is important at th … More e higher ship speed range.(3)Relative amount of the effect in hull resistance:Amount of the effect of the stern bottom form change is estimated to be significant in the powering for a full-scale ship.2.Effect of I_r(stern end immersion at running) on Stern Wave Resistance(1)Development of a method to estimate the effect of real stern immersion I_r on the stern wave resistance-An analytical method to estimate the stern wave resistance due to a transom stern taking I_r into consideration has been developed.-In the method, the stern wave resistance is treated as consisting of the four components : that due to the swbf, that due to the rfw, that due to acceleration of water flow at the stern end and that due to static water pressure change on the stern end plane.(2)Details of the effect of Iron the stern wave resistanceAnalysis of the model test results with above developed method has clarified the followings:-I_r relates with the stern wave resistance through its affecting the water flow velocity at the stern end viand the stern wave height 2_<r0>.-At the lower Froude number range of F_<rI><3.1:I_r/I is larger. The larger I_r/I brings larger resistance due to acceleration of water flow at the stern end C_<accs> and the C_<accs> occupies larger part of the stern wave resistance C_<sw>. I_r/I affects the stern wave resistance C_<sw> mainly through the C_<accs> The stern wave resistance is, therefore, almost decided by F_<rI> and I_r/I.-At the higher Froude number range of F_<rI>>3.1:I_r/I is smaller. The effect of I_r/I on the stern wave resistance is, therefore, not important. The stern wave resistance, the main part of which is the resistance due to the rfw C_<sfw>, is accordingly almost decided by F_<rI> and θ_e.3.Development of a Transom Stern Bottom Profile Form Design MethodBased on the results of the study described above, an theoretical method to design bottom profile form of the transom stern for such a ship that runs over a range of draft as a container ship has been proposed.4.Study Plan from NowWe would like to study on such a transom stern form of which stern wave resistance is equal to 0. Such a transom stern form is practically important and also necessary for study of transom stern form, because the stern wave resistance can be isolated from the residual resistance by using the transom stern form. Less

1.方尾船尾底剖面形状对船尾兴波阻力的影响（1）方尾船尾底剖面形状的影响：凹形船尾底剖面在F_ &lt;3.1的较低船速范围内使船尾兴波阻力最低<rI>。在F&gt;3.1的较高航速范围内，平尾型的尾波阻力最小<rI>。（2）尾底剖面形状与尾兴波阻力的关系：在F_ &lt;3.1的低航速范围内<rI>，尾底剖面形状主要通过控制真实的尾端浸水I_r来控制尾兴波阻力。在F&gt;3.1的较高航速范围内<rI>，尾底剖面形状主要通过控制剩余随浪高来控制尾波阻力。凹尾底剖面导致最小的真实的尾端浸没I_r，这在较低的船速范围内是重要的。平坦的船尾底部剖面导致最低的剩余随波高度，这在船侧是重要的。 ...更多信息 e更高的船速范围。（3）对船体阻力影响的相对量：船尾底部形状变化对实船动力的影响是显著的。（2）I_r（航行时的船尾浸入）对船尾波阻的影响（1）估算真实的船尾浸入I_r对船尾波阻影响的方法的发展--提出了一种估算方尾引起的船尾波阻的分析方法，该方法考虑了I_r的影响。在该方法中，船尾兴波阻力被视为由四个分量组成：由于SWBF，由于RFW，由于在船尾端的水流加速度和由于在船尾端平面上的静水压力变化。（2）铁对尾波阻力影响的详细情况用上述方法对模型试验结果进行分析，阐明了：I_r通过影响尾端流速Vi和尾波高2_r而与尾波阻力有关<r0>。在较低的弗劳德数范围F_<rI>&lt;3.1时，I_r/I较大。较大的I_r/I使尾端水流加速阻力C_增大<accs>，C_<accs>在尾波阻力C_中所占比例较大<sw>。I_r/I主要是通过C_r来影响船尾兴波阻力C_<sw>r<accs>，因此，船尾兴波阻力几乎由F_r<rI>和I_r/I决定。在较高的弗劳德数范围（F_<rI>&gt;3.1），I_r/I较小。因此，I_r/I对船尾兴波阻力的影响并不重要。因此，船尾的兴波阻力主要是由阻力系数<sfw>C_0<rI>和θ_e决定的。3.方尾型底型设计方法的研究在上述研究结果的基础上，提出了在一定吃水范围内航行的集装箱船方尾型底型设计的理论方法。这种方尾形式具有重要的实际意义，也是研究方尾形式的必要条件，因为方尾形式可以将尾波阻力与剩余阻力分离开来。少

项目成果

山野惟夫, 楠芳一, 鞍谷文保, 小川武節, 池渕哲朗, 舩野功: "Effect of Transom Stern Bottom Profile Form on Stern Wave Resistance ・ A Consideration on the Effect of Real Stern End Immersion -"関西造船協会論文集. 240号. 11-19 (2003)

Yoshio Yamano、Yoshiichi Kusunoki、Fumiyasu Kuratani、Takeshi Okawa、Tetsuro Ikebuchi、Isao Funano：“艉板船尾轮廓形状对船尾波浪阻力的影响·对实际船尾浸没效果的考虑 -”关西造船协会论文第 240 卷。 11-19（2003）

Tadao YAMANO, Fumiyasu KURATANI, Takenori OGAWA: "A Consideration on Resistance Test with Small Model Ships"Proc.of 2003 mechanical engineering meeting, the Japanese Society of Technology Education. 4-5 (2003)

Tadao YAMANO、Fumiyasu KURATANI、Takenori OGAWA：“小型模型船阻力测试的考虑”Proc.of 2003 年机械工程会议，日本技术教育学会。

山野惟夫, 楠芳一, 鞍谷文保, 小川武範, 池渕哲朗, 舩野功: "Effect of Transom Stern Bottom Profile Form on Stern Wave Resistance -An Experimental Study -"関西造船協会論文集. 239. 1-10 (2003)

Yoshio Yamano、Yoshiichi Kusunoki、Fumiyasu Kuratani、Takenori Okawa、Tetsuro Ikebuchi、Isao Funano：“横梁船尾轮廓形状对船尾波浪阻力的影响 - 实验研究 -” 关西造船协会交易 239. 1-10 (2003)。

山野惟夫, 楠芳一, 鞍谷文保, 小川武範, 池渕哲朗, 舩野功: "Effect of Transom Stern Bottom Profile Form on Stern Wave Resistance-An Experimental Study-"関西造船協会論文集(平成15年3月). 第239号. 1-10 (2003)

Yoshio Yamano、Yoshiichi Kusunoki、Fumiyasu Kuratani、Takenori Okawa、Tetsuro Ikebuchi、Isao Funano：“艉板船尾轮廓形状对船尾波阻力的影响-实验研究-”关西造船协会会议记录（2003年3月）第239号1- 10 (2003)

Tadao Yamano, Yoshikazu Kusunoki, Fumiyasu Kuratani, Takenori Ogawa, Teturo Ikebuchi, Isao Funeno: "A Consideration on the Design of Bottom Profile Form of a Transom Stern"Proc.of the 3^<rd> International Workshop on Ship Hydrodynamics, Wuhan. 73-83 (2003

Tadao Yamano、Yoshikazu Kusunoki、Fumiyasu Kuratani、Takenori Okawa、Teturo Ikebuchi、Isao Funeno：“艉板艉部轮廓形式设计的考虑”第三届国际船舶流体力学研讨会论文集，武汉。