Research On Dynamic Simulation Of Jacketed Roller Slewing Bearing Of Large Marine Crane

As the efforts to develop marine resources continue to increase, marineengineering equipment get a great development, and they trend to be modular,large-scale. In the marine construction work, marine cranes are essential tools, sothey also become large-scale correspondingly.Slewing bearing of the crane is acrucial component,and its design is directly related to the entire performance of themachine. In the design of slewing bearing, largest roller load and load distributionare the important basis and parameters, Therefore, it’s important to calculate theactual roller load. Currently jacketed roller slewing bearing is widely used inlarge-scale marine crane, this text analyzed the stress of this kind of slewing bearingbased on18m3grab dredger for waterway dredging.The upper load of crane applied to rotating turret, and through contact betweenroller and roller road which is fixed on rotating turret, the load distribute on thewhole circle roller according to certain rules. So the assumption and treatment iscrucial in the design of slewing bearing.In this paper, two types of models were established with Solidworks, ANSYSand ADAMS, one treated all components as rigid bodys, the other treated rotatingturret and roller road as flexible bodys. The studys focused on the stress of rollersunder lifting and rotating working condition. The main work was shown as thefollowing areas:(1)Established rigid models of slewing bearing and other components usingSolidworks, established flexible bodys of rotating turret and roller road usingANSYS, then got the neutral file. Imported the models got previously in ADAMS,after adding constraints and drivers, rigid virtual prototype and flexible-rigid virtualprototype were generated.(2)Run the dynamic simulations of two types model under lifting and rotatingworking condition respectively. Selected four representative rollers in the wholecircle, and got their contact force curves.(3) Compared the results between rigid body model and flexible-rigid model,At the same time, compared with the commonly used classical formula method and finite element method.after evaluating all of the methods, The conclusion was thatthe flexible-rigid model simulation was consistent with the actual situation mostly.This research regarded rotating turret and roller road as flexible component,under this assumption applied dynamic simulation. This method was complex,time-consuming, but it can be more truly to reveal the stress of slewing bearing, it’sa meaningful exploration, also it provided reference and direction for the furtherstudy of jacketed roller slewing bearing.