Measurement and Analysis of Structural Stress Changes of River-Sea Direct Ships on Specific Routes During Navigation

Abstract

In order to study the dynamic response and motion response characteristics of the river-sea direct ship’s structure under different conditions and waves during the navigation of the river section and the sea section, a container ship on the route from Wuhan to Yangshan was tested by using dynamic strain gauge, motion sensor and wave height gauge. The test points are arranged in the front and rear end walls of the cargo tank area, the middle section of the ship, the corner of the hatch, the intersection of the longitudinal bulkhead and the inner bottom plate and other areas that may produce high stress. The test results show that the wave environment conditions of the route area of the Yangtze River estuary are more complex, and the response components of the ship structure are more variable, which is quite different from the response of the structure in the Yangtze River Estuary; the predicted value of wave load is similar to the measured value, and the predicted bending moment is slightly larger than the measured bending moment.