飞艇附加质量的水动力模型试验技术研究

Hydrodynamic Model Test Techniques of Airship Added Mass

为了提高飞艇附加质量的测量精度,通过开展飞艇附加质量的水动力模型试验技术研究,将标准椭球体模型、飞艇水动力模型在水中强迫正弦周期性往复运动得到的力和力矩与在空气中强迫正弦周期性往复运动得到的力和力矩,对应相减,求得其与运动的同相分量,依据公式,换算得到相应的飞艇附加质量。试验结果表明:标准椭球体主方向上的附加质量均不大于理论值的10%,表明了飞艇附加质量的水动力模型试验技术是有效的,可以替代并补充风洞附加质量试验技术。

In order to improve the measurement accuracy of airship added mass,the hydrodynamic mode test technology of airship added mass was studied.The forces and moments obtained by the sinusoidal periodic reciprocating forced movement of the standard ellipsoid model and the airship hydrodynamic model in water were compared with those obtained by the sinusoidal periodic reciprocating forced movement in air,corresponding subtraction,the in-phase component of the forces and the movement were obtained,according to the formula,the airship added mass were obtained by conversion.The test results show that the added mass in the main direction of the standard ellipsoid is no more than 10%of theoretical value,it is concluded that the hydrodynamic model test technology of the airship added mass is effective and can replace and supplement the wind tunnel added mass test technology.