This paper presents results of dynamic measurements of the flow and structure oscillations. We proposed a model consisting of two in-tandem flexible cylinders in the water cross-flow. During the studies, vibration acceleration amplitudes at the shedding frequency and at the cylinders natural frequency were obtained as a function of the flow velocity. The velocity pulsation and pressure pulsation spectra were determined in the flow. A relatively simple structure enabled the use of non-contact measurement systems for cross validation and uncertainty quantifications. The mutual influence of flow and structural dynamics induced by the lock-in effect between the vortex shedding frequency (or its harmonics) and the natural frequency was analyzed. These activities were conducted to generate representative data in order to validate the requirements for hydrodynamic force calculation accuracy and the methods of one-way and two-way coupled FSI calculations.

本文介绍了流动和结构振荡的动态测量结果。我们提出了一个模型，该模型由水错流中的两个串联柔性圆柱体组成。在研究过程中，在脱落频率和圆柱体固有频率下的振动加速度振幅是作为流速的函数获得的。在流动中确定速度脉动和压力脉动谱。相对简单的结构使得能够使用非接触式测量系统进行交叉验证和不确定性量化。分析了涡旋脱落频率（或其谐波）与固有频率之间的锁定效应引起的流动和结构动力学的相互影响。