两栖车辆的有效干舷问题研究

干舷是衡量两栖车辆的水上浮性的一个重要指标,它对于两栖车辆的设计及使用有重要意义.本文研究了两栖车辆的有效干舷问题,提出了一种理论求解方法.根据流体力学的基本原理,利用连续性方程、贝努利方程、浮力与重力之间的关系,建立了车辆吃水量和航速的函数关系.由此得到了由于航速变化引起的干舷变化量,并结合由于兴波影响而产生的干舷变化,求得总的干舷变化量.通过对某型两栖车辆有效干舷的理论计算和模型试验结果的比较,验证了理论计算的有效性,为两栖车辆的设计和使用提供依据.

EFFECTIVE FREEBOARD OF AMPHIBIOUS VEHICLES

Freeboard of a vehicle is an important criterion to an amphibious vehicle's buoyancy. The concept of effective freeboard is important in the design and use of an amphibious vehicle. A method of its deduction in theory is introduced. Based on the theory of hydrodynamics, the functional relation between vehicle waterline and speed is established. According to the theory of wave movement, parameters of wave caused by speed are determined, and the total variation in freeboard is finally obtained. The paper gives the results of theoretical analysis and experiments for one type of amphibious vehicle.