Evaluation method and device for dynamic shock effect of transmission tower in goaf
A technology for dynamic impact and transmission towers, applied in data processing applications, instruments, calculations, etc., can solve the problems of transmission tower bearing capacity performance affecting safety hazards, without considering the dynamic impact effect, etc., to achieve high precision, good applicability, and improved The effect of safety performance
Active Publication Date: 2020-06-02
CHINA ELECTRIC POWER RES INST +1
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Problems solved by technology
[0004] In view of this, the present invention proposes a method and device for evaluating the dynamic shock effect of goaf transmission towers, aiming to solve the problem that the dynamic shock effect is not considered in the existing method for evaluating and analyzing the bearing capacity of goaf transmission towers in the process of foundation deformation. There are major safety hazards due to the impact on the bearing capacity of transmission towers
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[0024] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided for more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art. It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and examples.
[0025] Method example:
[0026] see figure 1 , figure 1 It is a flow chart of the method for evaluating the dynamic shock effect of a power transmission to...
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The invention provides a method and device for evaluating the power impact effect of a goaf power transmission tower. The method comprises the following steps: establishing a finite element model of the power transmission tower, and locating a power transmission tower foundation at different preset deformation states; performing a wind-induced response test on the power transmission tower to determine the damping ratio of the power transmission tower; setting a plurality of wind loads, and respectively calculating power impact coefficients of the power transmission tower when the power transmission tower foundation is located at different preset deformation states and different wind loads; and comparing the maximum value in the calculated power impact coefficients with a preset power impact coefficient, and if the maximum value in the calculated power impact coefficients is greater than or equal to the preset power impact coefficient, it indicates that the safety requirements of a power transmission line cannot be satisfied by changing the structure of the power transmission tower. According to the method for evaluating the power impact effect of the goaf power transmission tower provided by the invention, the influence of the goaf surface deformation impact effect to the bearing performance of the power transmission tower structure is considered to accurately evaluate the carrying capacity of the power transmission tower structure.
Description
technical field [0001] The invention relates to the technical field of health state assessment of transmission towers, in particular to a method and device for evaluating dynamic impact effects of transmission towers in goafs. Background technique [0002] The transmission tower located in the goaf of the coal mine is affected by the surface subsidence of the goaf in the coal mine, and the foundation of the transmission tower will be deformed, such as uneven settlement, inclination and horizontal slippage, which will cause the root opening and the height difference of the tower leg of the transmission tower to occur. Changes, the tower body structure produces a large additional stress, resulting in partial damage or overall collapse of the tower body, which directly threatens the safety of the transmission tower and the stable operation of the transmission line. [0003] There are two forms of surface settlement in gobs: slow settlement and sudden settlement. For the case o...
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IPC IPC(8): G06Q10/06G06Q50/02
CPCG16Z99/00
Inventor 杨风利
Owner CHINA ELECTRIC POWER RES INST