On the transition period in the process of cage catching by parachutes
Abstract
When studying the vibrations of rigid reinforcement of mine shafts, it is necessary to distinguish two types of forces of interaction between the parachute device and conductors – braking and coupling. Under the braking force we will understand the force of interaction between parachutes and conductors when the lifting vessel is moving along the conductors, and under the coupling force we will understand the force of interaction between parachutes and conductors when the lifting vessel is stationary in relation to the conductors or moving at a very small speed. In the general case, the coupling force is not equal to the braking force. Thus, in the case of friction parachutes, the difference in the value of braking force and coupling force will be determined by the difference in the value of coefficients of kinetic and static friction. It should be borne in mind that static friction is 1.7‑2.8 times greater than kinetic friction and, consequently, the coupling force will be greater than the braking force.
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References
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