风浪中锚泊渔船的锚链系泊张力的分析研究↑（*）

渔船在风浪冲击下锚泊时,其锚链的动力负荷会受到影响。通过非线性方程的求解,着重分析二阶波浪力导致的高系泊力。结果证明,在不同水深及风、浪、流的作用下,电焊锚链和钢丝绳所能承受的系泊拉力相差较大,从而为渔船锚泊规范制订提供了理论基础。

Analysis of chain tension for fishing vessel anchoring in rough water

When fishing ships are mooring in rough water, the dynamic loads on the cables will be affected by the wind, wave and current. By finding solution to the nonlinear dynamic equation of cables, the high mooring force, caused by second-order wave force, is analized specially. The results show that there exits a great difference of bearable mooring forces between welded chain and wire rope under different water depth, wind, wave and current. Under the sea conditions of wind speed 37.0 m/s, wave period 18.0 s, flow speed 5 kn, significant wave height 40.0 m and water depths 45, 60 and 80 m respectively, the welded chain will be broken but the wire rope will not under the same sea conditions. This analysis lays a theoretical foundation for making standard of anchoring for fishing ships.