Device and method for bending moment calibration of measurement beam for ship model wave load test

Abstract

The invention belongs to the technical field of ship model wave load test and relates to a device and a method for bending moment calibration of a measurement beam for ship model wave load test. The device for bending moment calibration of the measurement beam for ship model wave load test comprises the measurement beam, strain gauges are arranged on the beam surface at positions of measurement profiles of the measurement beam, one end of the measurement beam is fixed on the support, a tray is hung at the other end of the measurement beam via a steel wire rope, and weights can be placed on the tray. The method for bending moment calibration of the measurement beam for ship model wave load test includes: by the aid of a mode of stepwise loading and then stepwise unloading of the weights, collecting strain of each measurement profile, computing fitting coefficient of acting force of the weights and the strain, and computing coefficient of relationship between the strain of each measurement profile of the measurement beam and bending moment in actually born wave load of each measurement profile of a ship model by the aid of the fitting coefficient and space between each measurement profile and the hanging end. The device and the method are capable of calibrating the coefficient of relationship between the strain of each measurement profile of the measurement beam and the bending moment in the actually born wave load of each measurement profile of the ship model.

Description

technical field [0001] The invention relates to the technical field of wave load testing of segmented ship models, in particular to a device and method for calibrating the relationship between the strain of each measuring section on a measuring beam and the wave load suffered by each measuring section of a ship model, especially A device and method for calibrating the relationship between the strain of each measuring section of a measuring beam and the actual bending moment suffered by each measuring section of a ship model. Background technique [0002] The wave load test system is mainly used to measure wave shear force, bending moment, torque and slamming pressure, which involves two aspects: the design of the ship model itself and the design of the test system. There are three types of ship models, segmented ship model and integral elastic ship model, among which, the design of segmented ship model is more suitable for the test purpose of wave load. In the method of wav...

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Problems solved by technology

The above test method is based on the fact that there is a certain correspondence between the strain measured on the metal beam and the actual wave load on each measurement section of the ship model. Determine the corresponding relationship coefficient between the strain of each measurement section and the actual wave load on each measurement section of the ship model, and there is still a lot of room for research on the devices and methods currently used to determine the corresponding relationship coefficient

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