Abstract: A software has been developed to predict the inherent longitudinal vibration characteristics of the ship shafting. The software is developed using the QT platform, with the core solver written in MATLAB and the solution algorithm using the Holtz method. The results are compared and verified with the simulation results of ANSYS and the longitudinal vibration calculation results of an actual shafting system. On this basis, the developed software is used to discuss the variation of the longitudinal vibration characteristics of the shafting under different shafting properties. The results show that the properties affecting the inherent longitudinal vibration characteristics of the shafting mainly include the crank radius, crank thickness, longitudinal stiffness of thrust bearings and material elastic modulus. The relevant research results can provide references for the vibration and noise reduction of the ship shafting.

Key words: ship shafting, inherent longitudinal vibration characteristics, QT platform, MATLAB software, ANSYS software

摘要： 为实现船舶轴系纵向振动固有特性的预报,该文基于QT平台开发了一款预报软件。软件的核心求解器采用MATLAB语言编写,求解算法采用霍尔兹法,并与ANSYS软件仿真结果、某实际轴系纵向振动计算结果进行了对比验证。在此基础上,探讨了不同轴系参数变化情况下,轴系纵振特性的变化规律。结果表明：影响轴系纵振固有特性的参数主要有曲拐半径、曲臂厚度、推力轴承纵向刚度和材料弹性模量,相关的研究成果可为船舶轴系减振降噪提供参考。

关键词: 船舶轴系, 纵振固有特性, QT平台, MATLAB软件, ANSYS软件