Abstract
This paper establishes a flexible dynamics model of MQ2533 portal crane boom system. In the premise of ignoring control system, this paper analysis the mechanical dynamics of boom hoisting system. Simulation results show that: Dynamics response of the hoisting boom system have great fluctuation when excluding the control effects, this paper provide a theoretical basis for crane hoisting system to optimize control strategies, which committed to improve their performance and ensure safety, reliability and economy.
Highlights
Gantry crane is a large construction machinery, mainly used for port, berth, open stockyards and outfitting site
Boom system is an actuator of portal crane, it is the design basis of electrical systems and other subsidiary organs
In order to understand its mechanical properties of displacement response of key nodes, stress, deflection, vibration frequency, we need to treat it as a flexible body; For the pulley, reel, small rod, balance beam and hoist and other ancillary components, we only need to know their motion parameters such as size, quality and moment inertia, regard them as rigid bodies[5,6]
Summary
Gantry crane is a large construction machinery, mainly used for port, berth, open stockyards and outfitting site. It has good transport, big depth of spreader decentralization, better adapt to the temporary work and so on. In order to understand its mechanical properties of displacement response of key nodes, stress, deflection, vibration frequency, we need to treat it as a flexible body; For the pulley, reel, small rod, balance beam and hoist and other ancillary components, we only need to know their motion parameters such as size, quality and moment inertia, regard them as rigid bodies[5,6]. Denomination Equivalent inertia ofdrumJr(Kg·m2) Initial length of wireropel0(m) Rigidity coefficient ofwire rope Ec(N/m)
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