由于膜片联轴器拥有减振和误差补偿能力，故在船舶多齿轮箱系统中获得广泛应用。然而由于安装误差、系统承载变形和不对称弹性支承等因素的存在，联轴器不可避免地会产生不对中量进而影响齿轮系统的运行。因此，文中提出一种考虑膜片联轴器不对中的齿轮副准静态接触特性计算方法。该方法通过将联轴器不对中模型、啮合错位模型、系统静力学平衡方程和齿面承载接触分析模型（LTCA）相结合构建迭代计算流程，实现联轴器不对中导致的齿轮副非理想啮合状态下的接触特性分析。以船舶多齿轮箱传动系统中的双齿轮箱传动系统为研究对象，研究了联轴器不对中量、负载扭矩对人字齿轮副啮合特性的影响规律。研究结果表明：联轴器不对中对靠近联轴器的人字齿轮副影响较大，使啮合齿面载荷呈非对称分布，齿面出现脱啮区域，远离联轴器的齿轮副则不受其影响。随着不对中量的增加，啮合错位量增大，齿轮副脱啮区域增大，实际接触线长度变小，齿轮副啮合刚度减小。轻载时，齿轮副接触状态对联轴器不对中更加敏感，齿面会产生较大的脱啮区域，啮合刚度曲线发生明显变化。随着扭矩的增大，齿面达到完全接触状态，齿面上无脱啮区域，但由于联轴器不对中力使人字齿轮副左右齿面啮合错位量不对称，所以齿面呈现出偏载的现象。

Due to its vibration reduction and error compensation capabilities, diaphragm couplings are widely used in marine multi-gearbox systems. However, due to the existence of factors such as installation error, system load deformation and asymmetric elastic support, the coupling will inevitably produce misalignment and affect the operation of the gear system. This paper proposesed a calculation method for the quasi-static contact characteristics of the gear pair considering the diaphragm coupling misalignment. By combining the coupling misalignment model, the meshing misalignment model, the system static equilibrium equation and the tooth surface load contact analysis model (LTCA) to construct an iterative calculation process, the contact characteristics analysis of the gear pair under the non-ideal meshing condition caused by the coupling misalignment was realized. Taking the double-gearbox transmission system in the multi-gearbox transmission system of ships as the research object, the influence of coupling misalignment and load torque on the meshing characteristics of the double-helical gear pair was studied. The research results show that the misalignment of the coupling on the double-helical gear near the coupling has a greater impact so that the tooth surface load is asymmetrically distributed, the tooth surface appears disengaged area, away from the coupling gear is not affected by it. As the amount of misalignment increases, the amount of meshing misalignment increases, the gear pair disengagement area increases, the actual contact line length becomes smaller, and the gear pair meshing stiffness decreases. At light loads, the gear pair contact state is more sensitive to coupling misalignment. The tooth surface will produce a large disengagement area and the mesh stiffness curve changes significantly. With the increase of torque, the tooth surface reaches the complete contact state. With the increase of torque, the tooth surface reaches a complete contact state, and there is no disengagement area on the tooth surface. However, due to the misalignment force of the coupling, the meshing misalignment between the left and right tooth surfaces of the double-helical gear pair is asymmetric, so the tooth surface presents the phenomenon of partial load.