Long-base-line strain gauge and hull beam stress long-term monitoring device

Abstract

The invention provides a long-base-line strain gauge and hull beam stress long-term monitoring device. The long-base-line strain gauge and hull beam stress long-term monitoring device comprises two bases, wherein a first support and a second support are respectively installed on the two bases, a magnetostrictive displacement sensor is installed on the first support, one end of a measuring extension rod is fixedly connected with one end of a slide block installing rod arranged in the middle of the magnetostrictive displacement sensor, the other end of the slide block installing rod is connected with a sensor measuring slide block, and the other end of the measuring extension rod is fixedly connected with the second support. The long-base-line strain gauge and hull beam stress long-term monitoring device has the advantages of being simple in structure, convenient to install, dispense with calibration, accurate in measurement and free of temperature drift and the like and is suitable for long-term monitoring of hull beam stress and load states of large ships.

Description

technical field [0001] The invention relates to a device for long-term real-time monitoring of hull girder load and stress of a large ship, in particular to a long-baseline strain gauge and a long-term monitoring device for hull girder stress. Background technique [0002] The strength of hull structure is one of the main factors affecting the safety of ship navigation, and the longitudinal strength of hull girder is the most basic and important strength. In order to ensure that the ship girder has sufficient strength to resist the damage of the environmental load to the structure, people have put forward many design ideas and formulated various specifications, processes and maintenance plans in the process of ship design and construction. However, due to the strong randomness of the structural loads of ships navigating in waves, it is impossible to accurately predict these random loads during the design and construction process. Therefore, in order to ensure the safety and ...

AI Technical Summary

Problems solved by technology

However, due to the strong randomness of the structural loads of ships navigating in waves, it is impossible to accurately predict these random loads during the design and construction process. Therefore, in order to ensure the safety and expected service life of ship structures during navigation, it is necessary to Long-term real-time monitoring of hull loads and stresses

However, the previous methods often have the defects of being unable to measure the average strain of the hull girder, the calibration process is complicated, the installation is difficult, the temperature drift is large, the accuracy is low, and the cost is high, so it is difficult to realize the real-time monitoring of the hull girder stress.

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