Local Tangent Space Reconstruction Method for Nonlinear Correlation Structural Damage Diagnosis Index
A technology of nonlinear correlation and diagnostic index, which is applied in the field of local tangent space reconstruction of nonlinear correlation structural damage diagnostic index, which can solve the problems of non-linear narrow-area characteristics and low accuracy of piecewise linearization of damage diagnostic index , to achieve the effects of improving the accuracy of damage identification, improving the accuracy of piecewise linearization, and improving the accuracy
Active Publication Date: 2022-08-09
HARBIN INST OF TECH
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[0004] In order to solve the problem that the nonlinear correlation structural damage diagnosis index does not have nonlinear narrow-area characteristics under the influence of complex environments, resulting in low accuracy of segmental linearization of the damage diagnosis index, the present invention provides a non-linear correlation structural damage diagnosis index local tangent space reconstruction method
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[0085] In this example, the figure 2 The three-span continuous rigid-frame bridge structure shown is an example. The bridge span is 24m+48m+24m. The horizontal connection between the bridge abutment and the main girder is hinged, the girder and the pier are rigidly connected, and the bridge pier and the ground are rigidly connected. The additional main beam at the fulcrum is made of concrete, and the mid-span part is made of steel. The pier is made of concrete, the height of the pier is 12m, and the size of the rectangular pier is 1.5m×0.8m. The full bridge is simulated using 32 beam elements, each with a length of 3m. Assuming that the concrete and steel in the structure are related to the ambient temperature, the relationship between the elastic modulus of concrete and the temperature is as follows image 3 As shown, the relationship between the elastic modulus of steel and the temperature is as follows Figure 4 As shown, the annual variation law of the ambient temper...
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The invention discloses a local tangent space reconstruction method of nonlinear related structural damage diagnosis indexes. The non-linear narrow-domain feature discriminant factor is used to determine whether there is a nonlinear narrow-domain characteristic. For the structural damage diagnosis indexes that do not have nonlinear narrow domain characteristics, the local tangent space arrangement method is used to establish the main feature coordinate matrix of the structural damage diagnosis indexes, and the inverse operation of the local tangent space arrangement method is used to establish the reconstruction of the structural damage diagnosis indexes. index. The invention solves the shortcoming that the non-linear related structural damage diagnosis index under the influence of complex environment does not have the nonlinear narrow domain characteristic, resulting in low accuracy of segmental linearization of the damage diagnosis index.
Description
technical field [0001] The invention belongs to the field of bridge structure damage diagnosis, and relates to a local tangent space reconstruction method of nonlinear correlation structure damage diagnosis index. Background technique [0002] The strong spanning capability of the bridge structure shortens the traffic mileage, optimizes the road network construction, and improves the efficiency of transportation. It plays an important role in both the road transportation network and the railway transportation network. The safe operation of the transportation network is the key to guaranteeing the economic development of the country. Therefore, the operational safety of the bridge structure is very important. Due to the particularity of the bridge construction location, the bridge structure is usually located in a complex and harsh environment. Natural factors such as temperature, wind speed, and humidity directly affect the operation status of the bridge structure and interf...
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IPC IPC(8): G06F30/27G06K9/62G06F111/10G06F119/02
CPCG06F30/27G06F2111/10G06F2119/02G06F18/2135G06F18/23213
Inventor 刘洋杨昌熙
Owner HARBIN INST OF TECH