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Development of a Computer Program for Sail Performance Analysis of Sailing Yachts

帆船航行性能分析计算机程序的开发

基本信息

批准号：
05555268
负责人：
FUKASAWA Toichi
金额：
$ 3.26万
依托单位：
KANAZAWA INSTITUTE OF TECHNOLOGY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Developmental Scientific Research (B)
财政年份：
1993
资助国家：
日本
起止时间：
1993 至 1994
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-05555268/
关键词：
Sail Fluid-Structure Interaction Vortex Lattice Method Total Lagrangian Method Incremental Finite Element Method Sail Shape Parameters Vortex Lattice 法

项目摘要

In the present research, a set of computer programs were developed, in which the aeroelastic transient responses of the 3-dimensional flexible yacht sail can be simulated. The computer program consists of one main program and two sub-programs.In the main program, which is called as AESail, the structural response and the aerodynamic response of the sail are calculated simultaneously. Based on the incremental formulation, a Modified Vortex Lattice Method is employed to find the aerodynamic pressure on the sail, and a Finite Element Method is used to describe the structural behavior of the sail. As for the data input method of this program, two kind of8input data can be selected : One is the control force and the boundary conditions of the sail. With this input, both the sail shape and the response of the sail can be computed. Another input data is the actual sail shape, which can be measured with the use of the first sub-program. With this input, only the response of the sail, of which shape is specified, can be computed.The first sub-program, which is called as SSA-2D,is a image processing software, by which sail shape parameters can be obtained from the photo or video data of the sail. The second sub-program, which is called as SailView, is a graphics software, by which the calculated sail shape and the flowl pattern around the sail can be displayd on the computer display.Example calculations were performed in the case where the sailing yacht is pitching or rolling in a seaway in steady wind. Deformation of the sail, stress distribution on the sail, and the wake vortices behind the sail were shown, and the effectiveness of the method was discussed.

在本研究中，开发了一套计算机程序，可以模拟三维柔性游艇帆的气动弹性瞬态响应。该计算机程序由1个主程序和2个子程序组成。主程序AESail同时计算帆的结构响应和气动响应。基于增量公式，采用改进的涡格法来计算帆上的空气动力压力，并使用有限元法来描述帆的结构行为。对于本程序的数据输入方式，可以选择两种输入数据：一种是控制力和帆的边界条件。通过此输入，可以计算帆的形状和帆的响应。另一个输入数据是实际的帆形状，可以使用第一个子程序进行测量。通过此输入，只能计算指定形状的帆的响应。第一个子程序称为SSA-2D，是一个图像处理软件，通过该软件可以从帆的照片或视频数据中获取帆的形状参数。第二个子程序为SailView，是一个图形软件，通过该软件可以将计算出的船帆形状和船帆周围的流动模式显示在计算机显示屏上。以帆船在稳定风力的航道中纵摇或横摇的情况进行计算。展示了帆的变形、帆上的应力分布以及帆后的尾涡，并讨论了该方法的有效性。