用于水下测量的二分力天平

A Two-component Balance Used in Measuring Hydrodynamic Forces on a Cylinder under Water

本文介绍一种用于水下测量的二分力天平。天平采用内式悬臂梁双变形结构,把力和力矩的测量分开,避免了力作用点变化对测量结果的影响;天平设计和严格的加工精度保证了二分力之间干扰系数接近零;天平防水层采用了特制涂料。使用该天平在水洞中进行了单柱水动力系数测量实验,并将实验结果与已有的数据作了比较。

A two-component balance used in measuring forces on a cylinder under water is presented. The balance is designed in the form of a cantilever beam, one end of which is mounted to the wall of the test section and the other is fixed on the bottom of the model. Two sets of elastic elements mounted orthogonally on the beam are capable of yielding respectively the transverse and the inline forces without any coupling and moment effects. The balance is perfectly waterproofed. The experimental data obtained by the balance are in agreement with the previous results.