A method for calculating a motion load of a cutter suction dredger under a longitudinal buffering effect

Abstract

The invention discloses a method for calculating a motion load of a cutter suction dredger under the action of longitudinal buffering, which comprises the following steps of: 1, establishing the functional relationship among compensation force, compensation displacement, compensation bending moment and longitudinal compensation rotation angle of a longitudinal buffering device; 2, establishing a bending function calculation formula, a corner function calculation formula and a bending moment calculation formula of the positioning pile at each calculation point; Step 3, establishing a three-degree-of-freedom transient motion load coupling equation of surging, heaving and pitching of the ship body; 4, iteratively solving a three-degree-of-freedom transient motion load coupling equation of theship body at each time step; 5, establishing a three-degree-of-freedom motion load coupling equation of the ship body with the buffer device not working; And 6, comparing the results of the existenceof the longitudinal buffer device and the absence of the longitudinal buffer device, and calculating the buffer efficiency of the ship body and the longitudinal buffer device. The three-degree-of-freedom transient motion of the ship body is considered, the special state of the system is ignored, and the method has the advantages of being high in calculation accuracy and small in calculation amount.

Description

technical field [0001] The invention relates to the technical field of ships, in particular to the technical field of a motion load calculation method of a cutter suction dredger under the effect of longitudinal buffering. Background technique [0002] Cutter suction dredger is one of the two main types of dredging works. It undertakes major livelihood projects such as land reclamation, waterway maintenance, offshore oil and gas engineering infrastructure, and offshore mineral mining, making great contributions to social and economic development. As large-scale and heavy-duty become the development direction of high-end cutter suction dredgers, the bearing capacity of positioning piles has become one of the main obstacles to further improve the operating performance of cutter suction dredgers. Therefore, the vertical compensation system equipment for this problem has emerged as the times require, and has been widely used, becoming a hot spot in the industry. This buffer sy...

AI Technical Summary

Problems solved by technology

At present, there are few calculation methods suitable for the motion load of the cutter suction dredger under the effect of longitudinal buffering, and the existing calculation methods have the disadvantages of insufficient accuracy and large amount of calculation.

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