A sensor-based axial force detection method and system

Abstract

The present disclosure provides a sensor-based axial force detection method and system. Through the new axial force identification method based on frequency and mode shape, the problem of inaccurate identification of short cables can be well solved and the axial force identification of bridge short cables can be carried out. , in the process of actually measuring the axial force of the bridge cable, the axial force is unknown, so the Rayleigh-Leeds method is newly added in this disclosure to find the approximate range of the axial force of the bridge cable, and then use the formula to find the exact axial force, and use the frequency , Vibration shape measurement of the actual bridge cable bending stiffness; in the search for the initial value, starting from the energy method of the Timoshenko beam theory, improving the energy method of the Euler beam to identify the cable force, improving the accuracy of identifying the initial value, reducing The number of calculations is reduced; the elasticity and shear modulus of short cables measured by experiments are closer to the actual values ​​than the elasticity and shear modulus of a given material. The method is simple and economical, and can be well applied to actual projects.

Description

technical field [0001] The present disclosure relates to the fields of axial force detection and axial force recognition processing, and in particular to a sensor-based axial force detection method and system. Background technique [0002] In recent years, my country's economy has developed rapidly, and more and more long-span bridges with beautiful forms and magnificent appearances have appeared in our lives. Long-span bridges mainly include suspension bridges, cable-stayed bridges and composite structure bridges. In these bridges, the load-bearing components are mainly cable structures, such as suspension cables in suspension bridges, cables in cable-stayed bridges, and suspension cables in composite bridges. [0003] In recent years, more and more various long-span bridges have appeared. Long-span bridges mainly include suspension bridges, cable-stayed bridges and composite structure bridges. In these bridges, the load-bearing components are mainly rods and cable struct...

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Problems solved by technology

[0004] The present disclosure provides a sensor-based axial force detection method and system. Through the new axial force identification method based on frequency and mode shape, the problem of inaccurate identification of short cables can be well solved and the axial force identification of bridge short cables can be carried out. , in the process of actually measuring the axial force of the bridge cable, the axial force is unknown, so the Rayleigh-Leeds method is newly added in this disclosure to find the approximate range of the axial force of the bridge cable, and then the exact axial force is found by the formula, and the frequency , Vibration shape measured actual bridge cable bending stiffness

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