舰载直升机系留计算分析

Mooring Computation of the Ship Based Helicopter

对舰载直升机系留计算进行了系统分析．根据舰载直升机系留系统的特点，在系留计算中提出了一种新的数值计算方法．它运用迭代法，依据能量原理来求解舰载直升机在较大外载荷作用下的刚体位移和系留点及系留索的受力状态．

According to the specific feature of the mooring system of the ship based helicopter, the helicopter and the deck are treated as a rigid body, and only the mooring chain is deformable. A new numerical computing method is presented, which assumes that an infinitesimal displacement of the helicopter has taken place under the action of an external load. The deformationnand change of tension in each mooring chain will result and other restraining forces of the system can be solved with the equilibrium condition. The principle of minimum potential energy can be used to modify the displacement and the final results can be obtained iteratively. In the calculation, an equivalent elastic modulus is introduced with the nonlinear effect of the mooring chain taken into account. The results of mooring computation show that the method proposed is feasible.