Ammeter case evaluating method based on finite element

An evaluation method and finite element technology, applied in the direction of testing the strength of materials using one-time impact force, can solve the problems of lack of detection methods and means for sheet molding plastic watch boxes, increased scrap rate, defective rate, and delays in construction progress, etc. Achieve the effect of convenient and popular meaning and effect, strong dialogue, and simple operation experience

Inactive Publication Date: 2014-04-16
STATE GRID TIANJIN ELECTRIC POWER +1
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Problems solved by technology

[0003] In the current power system, because a large number of meter boxes are made of composite materials, especially sheet molding compound (SMC) materials, there has not been a fast, fast and effective way to resist the impact of external forces during transportation, installation and use. Quantitative means of testing, resulting in damage due to external impact, increased scrap rate, defective rate, and accidents that delay construction progress
At present, there is no more scientific detection method and means for the quality of sheet molding plastic watch box

Method used

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  • Ammeter case evaluating method based on finite element
  • Ammeter case evaluating method based on finite element
  • Ammeter case evaluating method based on finite element

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Embodiment Construction

[0038] The embodiments of the present invention will be described in further detail below in conjunction with the accompanying drawings: It should be emphasized that the embodiments of the present invention are illustrative rather than restrictive, and should not limit the protection scope of the present invention.

[0039] A finite element-based evaluation method for meter boxes, such as image 3 As shown, the drop weight impact detection system for sheet molded plastic case used in implementing the method includes a mechanical structure system and a computer control system.

[0040] Among them, the mechanical structure system includes the mechanical steel frame, foundation, bottom plate, drop weight, drop weight lifting and releasing structure, and the dropping weight lifting and releasing structure further includes the dropping weight attracting electromagnet and dropping weight protection sleeve. On the base plate, and place the predetermined drop hammer strike point of th...

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Abstract

The invention relates to an ammeter case evaluating method based on finite element, and the method comprises the following steps: (1) classifying samples; (2) selecting test points; (3) ordering test points; (4) marking testing points; (5) actuating drop hammer; (6) lifting drop hammer; (7) placing an ammeter case; (8) dropping hammer for impact; (9) enforcing drop hammer impacts for all marked test points; (10) treating cracks; (11) recording crack measurements; (12) treating all samples; (13) calculating test results. The invention employs the finite element analysis method for analyzing drop hammer damage and obtaining a main stress distribution of the ammeter case, thereby providing a guarantee for rapidly evaluating shock resistance of the ammeter case. The invention fills the blank in the field of electric power system ammeter case shock resistance detection, and establishes a quantitative evaluation method for ammeter case shock resistance.

Description

technical field [0001] The invention belongs to the technical field of quantitative analysis of the impact resistance performance of materials, and in particular relates to a finite element-based evaluation method for a meter box. Background technique [0002] The main weakness of composite materials is the sensitivity to impact damage, and the sharp decline in the compressive bearing capacity of structures containing impact damage. Studies have shown that with the increase of impact energy, the variable impact energy of its compressive bearing capacity includes two stages, that is, in the stage of low impact energy, with the increase of impact energy, its compressive bearing capacity continues to decline, when the impact energy exceeds a certain value After that, its compressive bearing capacity basically does not decrease and remains unchanged. Since the impact energy of foreign objects that the structure may suffer is a random variable and cannot be determined, the evalu...

Claims

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Application Information

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IPC IPC(8): G01N3/30
Inventor 谢浩杨霖王化张卫欣石卫平杨延春陈磊
Owner STATE GRID TIANJIN ELECTRIC POWER
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