Electromagnetic shielding effect multi-field coupling simulation method for electronic device chassis with conductive rubber

Abstract

The invention discloses an electromagnetic shielding effect simulation method for an electronic device chassis with conductive rubber, which is mainly used for solving the problem that the conductive rubber can not be simulated during shielding effect simulation in the prior art. The steps are as follows: establishing a multi-field coupling theoretical model for shielding effect of the chassis; introducing a chassis solid model established by Pro / E (pro / engineer) into Ansys for calculating structural displacement; transforming structural grids to electromagnetic grids and introducing into Feko software; measuring the transfer impedance of the conductive rubber, calculating the electrical conductivity and determining other electrical parameters; introducing the solid model into IcePak, andcalculating the temperature of all devices in the chassis; determining the magnitude of a driving source through a curve of a device radiation electric field along with the temperature change according to the temperature; setting the parameters of the conductive rubber and the magnitude of the driving source in the FEKO and calculating the electric field value of an observation point outside the chassis; and putting the electric field value into the multi-field coupling theoretical model and obtaining the shielding effect of the chassis. The electromagnetic shielding effect simulation method can simulate the electromagnetic shielding effect of the electronic device chassis with the conductive rubber, and be used for guiding the design of electromagnetic compatibility of the structure of the chassis.

Description

technical field [0001] The invention belongs to the technical field of electronic equipment and relates to electromagnetic screen effect simulation of a high-density chassis, which can be used to judge whether the electromagnetic screen effect of the chassis meets the design requirements and guide the design of the electronic equipment chassis. Background technique [0002] With the rapid development of radio electronic technology since the middle of the last century, electronic equipment has been widely used in various fields, and the chassis structure has also been widely used as the physical assembly and carrying platform of various components of electronic equipment. The design of modern chassis has electromagnetic compatibility requirements, and the main indicator is the electromagnetic screen effect of the chassis. [0003] Due to the installation of various switches, instrument panels, cables, etc. on the surface of the chassis, there must be holes and seams, which wi...

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Problems solved by technology

[0008] The purpose of the present invention is to solve the problem of difficulty in simulation and relatively large errors due to numerous influencing factors in the simulation of the electromagnetic screen effect of the electronic equipment chassis at present, and proposes a multi-field coupling simulation method for the electromagnetic screen effect of the electronic equipment chassis with conductive rubber to realize The accurate simulation of the electromagnetic screen effect of the electronic equipment chassis under the influence of multiple factors provides a reference for the design of the chassis structure

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