The pressure change of flow field caused by submarine navigation is known as submarine hydrodynamic pressure field,which is often used in mines for target detection so as to achieve both of-fensive and defensive effect.Considering the influence of the command deck enclosure and stern,the fully appended hull was used as the research object.Based on the validation study and the viscous flow theory,the submarine hydrodynamic pressure field was studied,whereby the effect of the appendage on the pressure distribution on the surface of the hull,around fluid and on the bottom were further re-vealed.The results show that the influence of the appendage on the pressure distribution on the sur-face of the hull was significant,but it was limited to a small area of the appendage,while the in-fluence on the hydrodynamic pressure field at the bottom was significant when the submarine was sai-ling near the bottom,and thus,the influence of the appendage can be ignored under the non-bottom sailing conditions for fast and efficient forecasting.Moreover,with the study of near-surface naviga-tion condition,the influence of surface waves on the distribution of submarine hydrodynamic pressure field exists,which affects the magnitude and the position of pressure peak.
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