In the hope of solving the problem of a type of fluke anchor getting seized in the anchor mouth with a centered arrangement during the initial anchoring,the paper established the space model of the anchor system,fluke anchor,anchor chain and anchor mouth,and divided the section of space model of anchor mouth.Analyzing the mechanical characteristics of the fluke anchor at the anchor mouth indicated that increasing the linear gradient at the anchor mouth is beneficial to the increase of the vertical downward force component of the anchor.Analyzing the mechanical characteristics of the motion trajectory of the fluke anchor on the anchor mouth indicated that when the tangent angle of the anchor at the slip section of the anchor mouth is close to 45°,it is beneficial to the increase of the horizontal outward force component of the anchor.Analyzing the mechanical characteristics of the relative motion be-tween the anchor chain and the anchor mouth indicated that decreasing the curvature of the cross-section curve of the anchor mouth can slow down the edge wear of the anchor mouth,and then slow down the loss of horizontal force and vertical force during anchor casting.The optimization of the linear shape of the anchor mouth enables the increase of sliding force of the fluke anchor at the moment of casting,to avoid the problem of the fluke anchor getting seized in the anchor mouth and not being able to be cast.
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