Research On The Cause Of Crack With The Rotating Sleeve Of Stevedoring Gantry Crane And Its Repair Scheme Optimization

Modem harbour crane has been continuously seeking higher economical efficiency. The stevedoring gantry crane in modern harbours plays a critical role in loading and discharge production. In a long term, management of metal structure is a difficult point in themanagement of harbour equipment. How to increase the scientific reasonability of these cranes, and to prolong their lives, is one important harbour of state supervision and fault diagnosis in harbour machinery.Taking the cause analysis and its repair scheme optimization of the rotating platfome sleeve crack with the 16t/33m gantry of the Sixth Harbour Company of Tianjin Harbour as the main research line, the dissertation makes such researches as on the conception and method of CAEA of stevedoring gantry crane structure, which includes the generating and treating method, the controlling method on the units and meshes. Analysis is carried out in the use of ANS YS software on the sleeve structure of the rotating platform thereof and stress, deformation and strain energy in the respect of distribution and the distribution atlas of stress, shift are acquired for the purpose of structure state monitoring and diagnosis as well as testing both in theory and technology instructions.The main points of innovation are as follows:Systematic research is made on the CAEA structure modeling of the stevedoring gantry crane. The combination of theoratic modeling and experimental modeling in its method and technology improves the reliability and scientific reasonability to model and calculate the results. The actual modeling and analysis therefor leads to the discovery of stress distribution under loading, which provides strong evidence for the cause of crack of the rotating platform. Correct repair scheme is proposed and testified, effectively solving the questioa with the 16t/33m gantry crane rotating platform and enhancing the scientific reasonability for a new step in the management level of harbour facilities.