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The thesis derived from National Key Technology Research and Development Program of China during the“10th Five-Year Plan”: The safety, diagnosis and optimization of large construction machinery.As the key equipment in large water conservancy construction, tower-belt combines belt conveyor and tower crane, which is characterized by complex structure, enormous size, poor working conditions, strong work intensity, numerous operating modes, continuous operation and group work. Based on the structure of tower-belt, referring to the requirement of computational mechanics and structure analysis and using dynamics of multibody systems, this paper built the FEM model of Tower-belt. The main work of this paper is building a series of models, algorithm and theory, which used in static strength analysis, modal analysis and parameter verification. And this paper accomplished the design, development and running of virtual prototype. Moreover, the study included simulation of two belt conveyers’unfold and rotation movement, obtaining the displacement and amplitude curves to provide the basis for motion control. To verify these theories, this paper accomplished the static analysis, static stiffness analysis and strength check of tower-belt and the elevator boom in three typical working conditions of hoisting operation mode. Additionally, this paper combines the FEM modal theory and Block Lanczos algorithm to get the frequencies and modal shape of tower-belt. Meanwhile, based on the modal analysis, the paper analyzed the modal of elevator boom to get the weak points of its structure, which can be used to offer improvements and remedies for unreasonable design measures to ensure the construction safety, reliability, and provided theoretical support.
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