The hydrodynamic characteristics of a blended wheel-track amphibious truck were studied via model towed tests and numerical simulations. First the mathematical model was set up and the process of launching and coming ashore was researched by theoretical analysis. The effect of tracks on assisting driving the truck on land was also studied. Second the influence of buoyancy boxes and bow plate on resistance, trim and sinkage was investigated by towing tank tests and simulation. The buoyancy boxes were designed to get more buoyancy force, and the bow plate was installed to prevent the bow submerged. The expanded buoyancy boxes could increase the resistance at $F_r\le 0.581$, but decrease the resistance at $F_r\ge 0.725$. In addition, the sinkage was also increased. The installation of bow plate could reduce the resistance significantly when $F_r\le 0.436$, and with the angle of 25° there was an approximately 3% resistance reduction rate compared with the 20°bow plate. Moreover, the trim was reduced 20.9% with the bow plate angle of 20°, and the pressure distribution on the bow plate at various conditions also confirms this result. Finally, a numerical wave tank was set up, and the seakeeping performance of the amphibious truck was researched.

通过模型拖曳试验和数值模拟研究了混合式轮迹两栖卡车的水动力特性。首先建立了数学模型，并通过理论分析研究了发射和上岸的过程。还研究了轨道对协助卡车在陆地上行驶的影响。其次，通过拖船试验和模拟研究了浮力箱和弓形板对阻力，修整和下沉的影响。浮力箱旨在获得更大的浮力，并安装了弓形板以防止船头被淹没。扩展的浮力箱可能会增加阻力$F_{\mathrm{[R}}\le 0.581$，但降低了 $F_{\mathrm{[R}}\ge 0.725$。另外，下沉量也增加了。弓板的安装可以显着降低阻力$F_{\mathrm{[R}}\le 0.436$，并且角度为25°时，与20°弓形板相比，电阻降低率约为3％。此外，在弓板角度为20°的情况下，内饰减少了20.9％，并且在各种条件下弓板上的压力分布也证实了这一结果。最后，建立了一个数值波箱，研究了两栖卡车的海上航行性能。