Investigation Of Structural Lightweight Design And Analysis For Rotary Support Of Large Floating Crane

Large floating crane is one of the most important equipment in marine resources exploitation, marine transportation, and other marine engineering. With the development of marine engineering, prompting development the floating crane towards large-scale, and own weight, lifting height, load capacity of floating crane will be greatly increased. Because of its large-scale, resulting in a huge amount of steel in structure, but also enormous pressure of the rotary support causes many defects of traditional rotary support. Currently large floating crane usually adopts the jacketed roller slewing ring, however, which has been unable to meet the requirements of large-scale.Based on the lightweight design of floating crane and the defects of traditional slewing ring, this paper proposed a new concept design-sliding friction type rotary support, using non-metallic materials to replace the traditional rolling type rotary support. Due to the structure characteristics of the rotary support, taking the low coefficient and excellent mechanical properties as the standard of sliding friction material selection. This paper took the sliding friction material as the research object. First, understanding the basic mechanical properties of the materials by materials testing, and having found its viscoelasticity, impacting structure analysis obviously. On this basis, for the large floating crane of2×8000tons, using finite element software to calculate the mechanical response and regularities of sliding friction type rotary support on different conditions. And through comparison and analysis, considering that Nylatron703XL can be used as sliding friction material, with the ability to replace the metal structure, and with the enormous application potential in bearing structures of engineering machinery. At the same time, in order to verify the rationality of design and analysis, based on partial similarity criteria, having designed the model test program.This paper research is in this way, which is material analysis--structure analysis--experiment analysis. Providing a complete design idea for engineering structure design, with some reference value in engineering.