Numerical simulation of electromagnetic coupling in explicitly meshed wiring looms and bundles

Xuesong Meng,Trevor M Benson,Geoff South,Zhewen Zhang,Phillip Sewell,Chris Jones,Simeon Earl,Rebecca Walton,Ana Vukovic

doi:10.1049/iet-smt.2017.0359

Abstract

In this paper, the Unstructured Transmission Line Modelling (UTLM) method based on a tetrahedral mesh is applied to model the electromagnetic coupling into wire looms and bundles with multiple cores that are typical of an aircraft system, when they are exposed to plane wave illuminations. The impact on the electromagnetic coupling into wires of both bundle configuration and the positioning of the bundle relative to simple structures are investigated using the UTLM method with explicit meshing of the wires. The work not only confirms that UTLM method as a powerful tool for dealing with wire looms and bundles but provides invaluable information on the margins to be expected in key experimental waveform parameters such as peak amplitude and frequency response.

Highlights

Cable and wiring looms and bundles are important features of the installation and integration of systems into complex platforms such as aircraft or modern automotive vehicles
In the present paper the work reported in [1] is extended to the study of long (8 m) wire bundles with multiple wires typical of those found in aircraft systems
In contrast to the present work, the evSyntax Error: Embedded font file may be invalid aluation of the electromagnetic response of a wire bundle has hitherto largely been confined to a decoupled, two-stage, process. This has involved an evaluation of the fields along the cable route followed by an evaluation of the coupling to and between the cables [5, 6 and references therein] and includes the approximate multiconductor transmission line (MTL) approach which consists of sampling an incident field and coupling this with a multiconductor transmission line network that may itself be nonuniform

Summary

Introduction

Cable and wiring looms and bundles are important features of the installation and integration of systems into complex platforms such as aircraft or modern automotive vehicles Their electromagnetic performance can vary considerably from one particular aircraft or automotive platform to a nominally identical one, depending on the details and variability of the installation. In contrast to the present work, the evSyntax Error: Embedded font file may be invalid aluation of the electromagnetic response of a wire (or cable) bundle has hitherto largely been confined to a decoupled, two-stage, process This has involved an evaluation of the fields along the cable route followed by an evaluation of the coupling to and between the cables [5, 6 and references therein] and includes the approximate multiconductor transmission line (MTL) approach which consists of sampling an incident field and coupling this with a multiconductor transmission line network that may itself be nonuniform. A range of results are presented to permit continued benchmarking of methods as computer power increases

Problem description

Three core wire bundles

Ten core wire bundles

Conclusion