With its mass and flexibility of an electrodynamic tether system considered,the propulsive motion of the electrodynamic tether system is modeled.

In this paper,the equilibrium equation of rope system is used as constraint condition,the length of steel rope is regarded as a system variable and the genetic algorithm is applied to optimize the whole system.

In this paper we develop a bearing capacity model for the wirecable hanging drainage system in the vertical shaft construction,and put the emphasis on the study of the influence of the water-hammer pressure (WH-P)upon the wire cable.