Charging gun wire connection part strength evaluation method

Abstract

The invention provides a charging gun wire connection part strength evaluation method, which comprises the following steps: constructing an implicit static analysis model of a charging gun wire connection part without a gun wire through simulation software, calculating a deformation result of a contact area of a bolt head and a pile body under the condition of applying a bolt pre-tightening force, and extracting a deformed bolt grid model; constructing an explicit dynamics analysis model of a charging gun wire connection part including the gun wire through simulation software, deleting a bolt structure, and importing the deformed bolt grid model; moving the imported deformed bolt grid model by a preset distance along the direction opposite to the pre-tightening force direction of the bolt so as to start assembly; applying forced displacement to the imported deformed bolt grid model, and simulating application of pre-tightening force, so that a bolt connecting hoop clamps the gun wire into a clamping groove in the pile body shell; and performing deflection operation on the end part of the gun wire by taking the charging gun wire connection part as a deflection center, and performing strength evaluation according to a strain result of the charging gun wire connection part.

Description

technical field [0001] The invention relates to the field of simulation technology, in particular to a method for evaluating the strength of a connecting part of a charging gun line. Background technique [0002] As an important infrastructure, new energy vehicle charging piles have a major role in promoting the promotion and popularization of new energy vehicles, and have been listed as one of the new infrastructure projects by the country in 2020. New energy vehicle charging piles can be divided into AC charging piles and DC charging piles. Among them, the output power of AC charging piles is small, and the pile body material is plastic parts. Evaluating the strength of the connection part of the charging gun wire under the swaying condition is an important part of the design of the AC charging pile. It is a traditional design method to prepare samples, conduct test evaluation, and then improve the structural design, thereby increasing the structural strength. However, t...

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Problems solved by technology

However, there are problems such as high cost and long period of test evaluation, and only one judgment result can be obtained, which lacks support for the research of process and law, and has poor guidance for product improvement design.

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