A static water tank to test oscillating cylinders and scale models of offshore structures has been constructed. The main purpose of the tank, which is approximately a cube of side 2.4m, is to provide a facility to measure the viscous contribution to the hydrodynamic damping of models. Models are mounted from a pendulum suspension system and the damping is measured following the deflection and release of the pendulum. Circular cylinders with deameters of 150mm and 312mm have been tested and the damping measured up to values of the viscous scale parameter #beta# of about 6 x 10~4. The processed data is presented as a variation of drag coefficient with Keulegan Carpenter number for different values of #beta#. The KC range studied is from about 0,003 to 3. Measurements have also been made using a square cross-section cylinder of side 300mm. Some preliminary results are presented for an approximately 1/100 scale model of a TLP hull. The form of the experimental results is explained by considering the drag to be composed of a boundary layer and a vortex component.
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机译：建造了一个静态水箱来测试摆动缸和海上结构的比例模型。储罐的主要用途是大约2.4m的立方体，它的目的是提供一种测量模型对流体动力阻尼的粘性贡献的设备。通过摆锤悬挂系统安装模型，并根据摆锤的偏转和释放来测量阻尼。已经测试了直径为150mm和312mm的圆柱体，并测量了阻尼，直到粘度标度参数＃beta＃的值约为6 x 10〜4。对于＃beta＃的不同值，处理后的数据表示为阻力系数随Keulegan Carpenter数的变化。研究的KC范围约为0,003到3。还使用侧面为300mm的方形横截面圆柱体进行了测量。对于TLP船体的大约1/100比例模型，提供了一些初步结果。通过考虑阻力由边界层和涡旋分量组成来解释实验结果的形式。
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