The Paper deduces the calculating formula for interference force between hoisting ropes in double-layerwinding and gives the calculating results of an example.
推导出双层缠绕时提升钢丝绳咬绳力的计算公式,给出一个实例计算结果。
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Double step drum is an integral drum with stepwise flanges and double step sections. It allows the multiple layer rope winding in non-operating portion of luffing mechanism to make drum shorter.