Analysis Of Ship Propulsion Shafting Characteristics Based On ADAMS And ANSYS

The marine propulsion shafting system is an important part of the ship power plant, whose performance has a direct impact on the reliability of the ship, it is also a crucial indicator of the vitality of the ship. With the rapid development of science and technology, requirements for the performance of marine propulsion shafting are getting higher and higher, with its structure becoming more and more complex. Therefore, analysis of the dynamic characteristics of shafting system is essential in order to meet the requirements of the shaft’s working performance and ensure good vitality and reliability of the ship at the same time.In the process of researching into the systematic characteristics of power structure, employing the multi-body dynamics simulation method is the development trend, which is based on virtual prototype technology and combined with finite element method (FEM). On the basis of finite element method and multi-body dynamics theory, this paper analyzes the kinetic characteristics and torsional vibration characteristics of the marine propulsion shafting system in different operating conditions by the use of ANSYS and ADAMS.This paper mainly focuses on the following aspects, including the virtual prototype modeling of the marine propulsion shafting, the analysis of natural frequency of the shafting, the analysis of the characteristics of the shafting dynamics, the analysis of the characteristics of the shafting torsional vibration and the accuracy of the simulation results through experimental verification. First, create a three-dimensional solid model of the shafting in Pro/e according to the actual size of a ship and introduce the model into ADAMS and ANSYS respectively. Impose various constraints on the shafting to complete the multi-rigid-body dynamics simulation in ADAMS; mesh the introduced shafting in ANSYS and do the modal analysis to generate a neutral file. Import the neutral file generated by ANSYS into ADAMS to replace the corresponding rigid body parts and establish the rigid-flex hybrid model of the shafting. Second, analyze the dynamics characteristics and torsional vibration characteristics of the shafting in different operating conditions in ADAMS. At last, measure the transient speed of the shafting in different operating conditions by the use of the LMS system developed by LMS Company, getting the variation of instantaneous speed in different conditions.This paper makes an analysis of the features of marine propulsion shafting system by combining ADAMS and ANSYS and verifies the validity of the simulation calculation method via doing experiments on experiment bench. It offers reference for the management and maintenance of the shafting.