A Monitoring Method of Hot Spot Stress in Ship Structure

Abstract

The invention discloses a monitoring method for structural hotspot stress of a ship. The monitoring method comprises the steps of: S10, analyzing a to-be-monitored position where the ship is prone todeform by adopting a finite element analysis method according to a design drawing of the ship; S20, installing a three-way strain gauge at the to-be-monitored position; S30, and acquiring data of thethree-way strain gauge during the loading or sailing process of the ship, and determine whether a structural stress value at the to-be-monitored position exceeds a designed safety value through data comparison. By setting the three-way strain gauge at the position where the ship is prone to deform, the three-way strain gauge can monitor stress variation at the position precisely, if the monitoredstructural stress value is greater than the designed safety value, the fact indicates that the position is at large risk of breakage, and thus the sailor can be reminded to carry out corresponding maintenance treatment; and the monitoring method selects to perform monitoring during the loading and sailing process, thus states of the ship under the two working conditions can be timely fed back, theposition where the ship is prone to deform can be learnt about timely, so as to carry out treatment in time, thereby eradicating potential safety hazards and improving sailing safety.

Description

technical field [0001] The invention relates to the technical field of ships, in particular to a method for monitoring hot spot stress of ship structures. Background technique [0002] With the increasing size and complexity of ships, the loads on ships at sea are increasing, and the novel design of some ships makes the force of the whole ship more and more complicated. At present, ships are generally equipped with a loading computer. One of the functions of the loading computer is to calculate the total longitudinal bending moment and shear force of the hull girder at this time according to the draft and loading state of the ship, so as to ensure that the total longitudinal strength of the hull girder meets the design requirements. [0003] However, when the loading computer checks the strength of the hull girder, it can only calculate the total longitudinal bending moment and shear force of the hull girder under a specific loading state, that is, the loading computer pays ...

AI Technical Summary

Problems solved by technology

Therefore, it is obviously not enough to use the loading computer to monitor the force condition of the ship, and it cannot monitor the local load of the ship

However, the damage to the ship caused by local loads is more difficult to be found, and there is a great potential safety hazard

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