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Time-varying structure parameter identification method, storage medium and equipment

A recognition method and technology of structural parameters, which are applied in character and pattern recognition, electrical digital data processing, design optimization/simulation, etc. Robust effect

Pending Publication Date: 2022-03-15
HARBIN INST OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problem that the existing identification method cannot accurately identify the parameters of the viscous damper applied in the seismic structure system, the present invention further proposes a time-varying structural parameter identification method

Method used

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  • Time-varying structure parameter identification method, storage medium and equipment
  • Time-varying structure parameter identification method, storage medium and equipment
  • Time-varying structure parameter identification method, storage medium and equipment

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specific Embodiment approach 1

[0088] This embodiment is a time-varying structural parameter identification method, which is aimed at the seismic structural parameter identification method using additional restoring force viscous dampers, and is actually an adaptive forgetting factor-based unscented Kalman filter algorithm (Adaptive Forgetting Factor Unscented Kalman Filter Method) identification method; the damping restoring force of the additional restoring force viscous damper comprises energy dissipation viscous damping restoring force and the additional restoring force caused by the structure, when the viscous damper is installed in the structure, identification The process consists of the following steps:

[0089] Step 1. According to d'Alembert's principle, structural dynamics and finite element theory, deduce the motion control differential equation of the system or establish the finite element model of the system. The system is an anti-seismic structural system, which is referred to as the system fo...

Embodiment

[0144] The method for identifying time-varying structural parameters described in the present invention can not only be used for anti-seismic structures using additional restoring force viscous dampers, but actually the present invention can also be used for anti-seismic structures using ordinary viscous dampers. In the case of ordinary viscous dampers, it is only necessary to adjust the quantities in the initial state quantities. Since ordinary viscous dampers are very common, it is easy to determine the corresponding identification process through the present invention, and the present invention will not repeat them.

Embodiment 1

[0147] In order to fully illustrate the present invention, the present embodiment first Figure 4 The additional restoring force shown for the viscous damper is explained:

[0148] The additional restoring force viscous damper includes a first connecting piece 1, a piston rod 2, a left end cover 3, a first damping cylinder 5, a first piston 6, a right end cover 8, a second piston 10, two metal Rubber ring 12, second connector 13 and second damping cylinder 14;

[0149] The first damping cylinder 5 is a cylindrical structure with openings at both ends, the left end cover 3 is fixed on the left port of the first damping cylinder 5, the right end cover 8 is fixed on the first damping cylinder 5, the left end The cover 3 and the right end cover 8 seal the first damping cylinder 5;

[0150] The second damping cylinder 14 is a barrel-shaped structure with one end open, and the open end of the second damping cylinder 14 extends into the first damping cylinder 5 from the right port ...

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Abstract

The invention discloses a time-varying structure parameter identification method, a storage medium and equipment, and belongs to the technical field of civil engineering energy dissipation and shock absorption. The method aims at solving the problem that an existing recognition method cannot accurately recognize parameters of a viscous damper applied to an anti-seismic structure system. The method comprises the following steps: firstly, determining an initial state vector and an initial state quantity covariance corresponding to an anti-seismic structure system, carrying out preliminary identification based on an unscented Kalman filter algorithm, calculating a sensitive parameter eta k corresponding to each step and drawing a time history curve in the process, and if a peak pulse appears in the time history curve, determining that the anti-seismic structure system is identified. If eta < k > is greater than or equal to eta < 0 >, performing identification based on an unscented Kalman filter algorithm of an adaptive forgetting factor, in the process, if eta < k > is greater than or equal to eta < 0 >, correcting and measuring a prediction covariance, a cross covariance and a state quantity covariance based on the forgetting factor, and updating a Kalman gain matrix and a state quantity of a kth time step until a cycle is finished, and obtaining to-be-identified parameters in the state quantity in the identification process. The method is used for parameter identification of the time-varying structure.

Description

Technical field: [0001] The invention belongs to the technical field of energy dissipation and shock absorption in civil engineering, and relates to a time-varying structural parameter identification method, storage medium and equipment. Background technique: [0002] The traditional anti-seismic method of structures is to resist earthquakes by enhancing the strength and stiffness of the structure itself, that is, the structure itself stores and consumes seismic energy, which is a passive anti-seismic countermeasure. Due to the randomness of earthquakes, the intensity and characteristics of earthquake disasters cannot be accurately estimated. Therefore, structures designed according to traditional seismic methods do not have self-adjusting functions, and are likely to be severely damaged or collapsed under earthquake or wind loads. Structural energy-dissipating and shock-absorbing technology sets energy-dissipating devices in some parts of the structure, and absorbs the ene...

Claims

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Application Information

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IPC IPC(8): G06K9/00G06F30/23G06F30/17
CPCG06F30/23G06F30/17G06F2119/14G06F2218/12Y02T90/00
Inventor 丁勇张翼飞张延哲王林
Owner HARBIN INST OF TECH
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