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Calculation of the Required and Maximum Rope Tensile Force

From J.D. Neuhaus
 

 

When opening hatch covers or moving loading arms by means of a rope over a fixed deflection sheave, the geometry of the force application and thus the magnitude of the required rope tensile force FS also changes with the angle γ. The main parameter affecting the rope tensile force is the relationship between width B and height H (see diagram). The maximum rope tensile force is required in the horizontal position (γ = 0).

If the four geometric parameters and mass m are specified, the maximum required rope tensile force at angle γ = 0 and the required rope tensile force at a defined opening angle γ can be determined.

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