Establishment of the Measurement System for the Total Performance of a Sailing Boat and Improvement of the Method for the Performance Prediction

建立了一套全尺寸帆船姿态和运动数据与风浪数据同步采集的测量系统。通过10.6m-LOA级帆船在不同风浪条件下的海试，验证了该系统的有效性。利用科研经费购买的垂直陀螺仪测量了该船的横倾角和纵倾角，得到的结果如下：1)将定常航行状态下的测量值与速度预报程序(VPP)的结果进行了比较，速度预报程序利用模型试验和数值分析的数据进行了计算。比较澄清了VPP中的一些有争议的问题，然后对这些问题进行了改进。2)利用投入式波浪仪测量了船的运动并进行了波浪测量。用谱分析方法对测量结果进行了分析，并与模型试验数据和数值计算结果进行了比较。分析结果表明，风帆巡洋舰在波浪中具有明显的运动特征。3)研究了风帆巡洋舰的操纵和操纵特性。进行了常规转向、Z向机动、变幅上升和追尾试验。并将试验结果与数值模拟结果进行了比较。通过比较，为帆船操纵特性和尾随性能的预报提供了重要信息。这些结果可为研制高性能帆船巡洋舰和智能航海转向系统奠定基础。

The authors established a measurement system which collects the data of the attitude and movement of a full-scale sailing boat in conjunction with the data of wind and wave, simultaneously. This system was confirmed by the sea test of the sailing cruiser, 10.6m-LOA, under various wind and wave conditions. The both angles of heel and pitch of the boat were measured using a vertical gyro, which was purchased by the budget of the Grant-in-Aid for Scientific Research.The results obtained are as follows :1) The measured items at the steady sailing states were compared with the results of the velocity prediction program (VPP), which was calculated using the data of both model tests and numerical analysis. The comparison clarified some controversial points of the VPP, and then those points were improved.2) The movement of the boat was measured in conjunction with wave measurements using a throw-in type wave meter. The measured results were analyzed by means of spectral analysis, and the results were compared with both model test data and numerical calculations. The analyzed results indicated the distinctive feature of motion for the sailing cruiser in waves.3) The steering and maneuvering characteristics of the boat were also investigated. The performed experiments were normal steering, Z maneuver, luffing-up and tacking tests. The test results were compared with those of numerical simulations. The comparison provided important informations for the prediction of maneuvering characteristics and tacking performance of a sailing cruiser.The method of performance prediction for a sailing cruiser including dynamic characteristics was established by this study. These results can be used as a foundation for the research to develop high performance sailing cruiser and intelligent steering system for sailing.