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The Study on Dynamic Coefficients of Lifting and Dynamic Effect of Construction about Lattice Type Crane

Author: FangZhiGang
Tutor: LuNianLi
School: Harbin Institute of Technology
Course: Mechanical Design and Theory
Keywords: Tower crane Lifting dynamic load factor Dynamic finite element The structure dynamic load effect Dynamic load experimental
CLC: TH211.6
Type: Master's thesis
Year: 2007
Downloads: 204
Quote: 1
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Abstract


With the needs of the development of the project construction, cranes are playing an increasingly important role. At present, domestic and foreign crane design specification, consider the kinetic effect on the structure of the tower crane, not really from the point of view of kinematics and dynamics analysis directly on the crane structure calculation and analysis, while the use of the method of dynamic load factor, and that structure Lifting load or structural weight load superior dynamic load factor from liters static method instead of the real dynamics effects, this method is simple and practical. But for a complex structure of the tower crane, in different parts of the dynamic load impact how? Structural dynamic effects? How reasonable structural design under dynamic load effects? Problem is worthy of further study. Kinetic effects inside of the tower crane to the lifting action overload factor to determine the most important paper to the horizontal arm trolley tower crane lifting dynamic load coefficient and structural dynamic load effects study, analysis of the reasons for its introduction, the correlation and the tower machine structure. Firstly, analysis and comparison of the research used tower crane design specification and many domestic and foreign scholars; Secondly the the experimental tower crane design process, and production and installation of the experimental tower crane; Finally, the experimental type tower crane object of study, the use of the dynamic finite element method for dynamic characteristics analysis, drawn tower crane five conditions of the lifting action overload factor structure dynamic load effect coefficient values. Dynamic load experimental analysis on the basis of the above work, experimental type tower crane structure and dynamic finite element analysis results. According to the theory of finite element modeling and analysis of the structure of the tower crane processing SAP84 structural finite element analysis program analysis and calculation. Weight off the ground when the tower crane from the liter and decreased braking conditions were studied to determine the loading conditions of the different periods in the braking process, especially the lifting of heavy objects from the stage to a more detailed analysis, and load time. And two methods of analysis results are compared with existing design specifications, integrated presentation starting up Dynamic load coefficients and structural dynamic load effect obtained valuable data for engineering design analysis and conclusions. Further revised and perfected this study of tower crane design specification will also provide some useful reference.

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CLC: > Industrial Technology > Machinery and Instrument Industry > Lifting machinery and transport machinery > Lifting machinery > Easy lifting machinery > Elevators, lifts
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