A High-Precision Dynamic Measuring Method of Tension in Damping Suspension Rod System

A high-precision, boom-based technology, applied in force/torque/power measuring instruments, measuring devices, instruments, etc., can solve problems such as insufficient precision, and achieve the effect of increasing the matrix condition number, increasing the condition number, and increasing stability
CN112182697BActive Publication Date: 2022-04-12HOHAI UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
HOHAI UNIV
Publication Date
2022-04-12

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Abstract

The invention discloses a high-precision dynamic measurement method for the tension of a damping boom system, comprising the following steps: establishing a vibration control differential equation and a dynamic eigenvalue equation of the boom system considering the influence of additional mass, boundary rotation stiffness and shock absorber ; The dynamic eigenvalue equation in matrix form is obtained by solving the finite difference method; the derivative function of the frequency of the boom system to its tension, bending stiffness, boundary rotation stiffness and shock absorber damping is solved based on the derivative of the matrix eigenvalue; based on the frequency of the boom The derivative function constructs the parameter sensitivity matrix; establishes the inversion algorithm of the boom system parameters according to the parameter sensitivity matrix and the least square method; obtains multiple target frequency values ​​​​by the method of additional mass; calculates and obtains multiple estimated frequencies according to the estimated system parameters; The system parameters at a given frequency are calculated according to the target frequency value, estimated frequency and inversion algorithm. The method provided by the invention solves the difficult problems of force measurement with short suspenders and system with damped suspenders in actual engineering.
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Description

technical field

[0001] The invention belongs to the technical field of bridge engineering, and in particular relates to a high-precision dynamic measurement method for the tension of a damping suspender system. Background technique

[0002] The test of cable force and hanger force is an important issue in bridge inspection and construction monitoring, and its test accuracy is of great significance for the safety monitoring of bridges in construction and operation stages. The existing cable force testing methods include oil pressure gauge method, pressure sensor method, vibration frequency method and magnetic flux method, among which the vibration frequency method has been widely used in engineering because of its convenience and speed. However, the accuracy of the vibration frequency method is affected by factors such as the sag effect of the cable, bending stiffness, boundary conditions and dampers, and the range of application of the theoretical formula is limited. [000...

Claims

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