Ship emergency anchoring penetration depth calculation method

Abstract

The invention discloses a ship emergency anchoring penetration depth calculation method, which comprises the steps of constructing an anchoring model, constructing a stratum model, and calculating the ship anchor penetration amount through a discrete element method, when the anchoring model is constructed, the stress of an anchor before entering water and in the water entering process is analyzed, the speed of the anchor at any underwater water depth can be obtained, and the ship emergency anchoring penetration depth can be calculated. According to a discrete element analysis method, the characteristics of a pebble substrate at the bottom of a riverbed in an engineering area and the dynamic penetration process of impacting the riverbed by the falling anchor are really simulated, so that the penetration depth of emergency anchoring of a ship under the conditions of different anchor types, different water levels and different scouring depths can be conveniently calculated. A support is provided for reasonable burial depth engineering design and safe operation of the river tunnel.

Description

technical field [0001] The invention relates to the technical field of water transportation engineering, in particular to a method for calculating the penetration depth of emergency anchoring of ships. Background technique [0002] With the increase of the water level of the Three Gorges Reservoir, the channel conditions have been greatly improved, and the Yangtze River Shipping Industry has developed rapidly. The number of ships passing the lock has increased from 1040t at the beginning of the operation of the Three Gorges to 3784t in 2014. At the same time, the efficiency of the Three Gorges ship lock has improved. The flow of ships has increased significantly, and the scale of ships has gradually increased. The development requirements of the regional economy and society along the river and the planning of the regional road network urgently require the cross-river tunnel project to communicate with both sides of the river, and the safety of its design and operation has be...

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Problems solved by technology

[0003] Generally speaking, after the tunnel is completed, anchoring and towing are prohibited within a certain range upstream and downstream, but it is inevitable that emergency anchoring will be required after the passing ships lose control, especially the ships in the engineering river section are relatively large, and the buried depth of the tunnel should be fully considered. Breakdown depth of emergency anchoring of large ships to prevent damage to the proposed tunnel caused by anchoring

[0004] At present, the amount of anchor penetration is mostly estimated by engineering experience or empirical formulas, and there is a certain degree of blindness, and there are few experimental studies on the penetration of anchors into sand and pebble riverbeds. The support of relevant theories and research is urgently needed to promote the penetration of anchors Scientific and precise development of input calculation

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