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- W3202014494 abstract "During dynamic compaction , frequent heavy load unloading impacts are the main reasons for crane structural damage. To address this problem, a new method to reduce the unloading impact for a crane is discussed. Firstly, through the energy method, an expression for the energy consumption of the unloader that has been ignored before is established and a mathematical model describing the key parameters of the unloader is obtained. Secondly, a force controlled unloader is designed to convert the pulling force control of the wire rope that suspends the heavy hammer into its own hydraulic control. Thirdly, a rigid-flexible coupling model of a crawler crane used for dynamic compaction is built to predict the relationship between the unloading time and the dynamic response. Finally, a new unloader that slowly releases heavy hammer in the air under gravity has been developed and the experimental result proves the feasibility of flexible unloader. • An expression for the energy consumption of the unloader ignored before is built. • The damping condition of dynamic compactor depends on the negative work of unloader. • An unloader for slowly releasing heavy hammer in air under gravity is developed. • The unloading time from simulation model is consistent with theoretical calculation." @default.
- W3202014494 created "2021-10-11" @default.
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- W3202014494 date "2021-12-01" @default.
- W3202014494 modified "2023-09-29" @default.
- W3202014494 title "Research on flexible unloading method for dynamic compaction" @default.
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- W3202014494 doi "https://doi.org/10.1016/j.jobe.2021.103359" @default.
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