The Research Of The Folding Type Marine Crane

With the rapid development of the inland waterway transportation, there is anincreasing demand for marine crane, and it is becoming more and more necessary todevelop a folding type marine crane which is suitable for the occasion of narrowspace on the small or middle ship’s deck. So far, there are very few researches on thefolding type marine crane. Boom deformed and web crashed account for a significantproportion in the forms of the cranes’ damages. This paper primarily researched thekinematics, dynamics，load status and boom deformation of the crane.According to the marine crane’s working condition, the kinematics and dynamicsanalysis of the crane are carried out in this paper, as well as its load analysis.According to the load of the crane, the booms’ deflection analysis has been done.Hydraulic system of the crane is designed based on its using frequency and workingcondition. On the basis of theoretical analysis of the crane, the overall design and thekey parts’ structure design of the crane have been completed. A crane, whose ratedlifting weight is two tons, is established by Solidworks, which makes the design ofcrane materialization, visualization, and improves the efficiency of the crane design,shortens the cycle of crane’ design, modification and optimization. The crane’dynamics analysis has been made by ADAMS, and the acceleration’s changing curveof the basic boom with hoisting load of2t is obtained. It indicates that the changingtrend of the acceleration is consistent with the result of the movement analysis.Finally, the stress and deformation analysis of the booms with rated lifting weightsare made by ANSYS/Workbench. The deformation and stress contours of the boomswhich work in rated lifting weight and different amplitude angles are got, and therelationship between deformation and different amplitude angles is obtained byfitting the data of the deformation contours.Based on the research of the booms’ acceleration and deformation of the marinecrane, the relationship between acceleration of booms and amplitude angles is got, aswell as the relationship between the stress of booms and amplitude angles under thesame load, which provides some reference for the further research of the folding type marine crane.