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MECANOMECANOCableCable

Dynamic Analysisof Guyed and

SuspendedStructures,

IncludingElectromagnetic

andAerodynamic

Loads

Dynamic Analysisof Guyed and

SuspendedStructures,

IncludingElectromagnetic

andAerodynamic

Loads

Physical cable structure(Courtesy of JANSSEN Eng., LERC)

MECANO CABLE is a tool providing a static and dynamicanalysis of the nonlinear behaviour of structures consisting ofcables, taking into account any possible electromagnetic andaerodynamic loads.

It is a component of the set of nonlinear MECANO softwares,which also comprises MECANO STRUCTURE devoted tostructural nonlinearities, and MECANO MOTION, devoted tothe study of flexible mechanisms.

This software has undergone many experimental validations, inparticular in the case of the mechanical effects of short circuits.

Static analysis of complex structures made upof slack or weakly tautened cables.

Various dimensional constraints may be imposedin view of the final desired configuration, e.g. thetension in chosen components at a giventemperature, the sag…

TYPES OF ANALYSES

MECANO CABLE allows any type of dynamic or staticanalysis. The electromagnetic loads are evaluatedcontinuously , and include the heating up resultingfrom short circuit currents.

Classical damping can be included in the timeintegration scheme (Newmark, HHT) which isavailable with a fixed or automatically updated timestep.

Moreover, coupling with the other SAMCEF modulesallows e.g. a modal extraction from an equilibriumposition of the structure.

TYPES OF ANALYSES

Study of the dynamic behaviourof the Normandy Bridge, France

(SAMTECH, JANSSEN Eng.)

The Normandy Bridge

MECANO CABLE includes a generator ofturbulent wind samples, based on aspectrum with known spatial coherenceand vertical profile.

Dynamic behaviour ofan antenna (JanssenEng., LERC)

Dynamic analysis, up to the point wherea possible limit cycle occurs, of structures

exhibiting known aerodynamiccharacteristics which could depend onangle of incidence. This study allows anassessment of the efficiency of control

devices and dampers.

Tension in cables resultingfrom a short-circuit

Transient dynamic analysis of electricalnetwork substructures (overhead lines, rigidbar or cable stations, distribution boxes,reactance, coil head, …) after the occurrenceof a two- or three-phase short circuit.

Tension in cables resulting from abroken wire in an

overhead line section

USER INTERFACE

• Menus and acquisition boxesallow the user to input data veryeasily

• An integrated CAD modellerfacilitates modelling and dataapplication

• Groups allow the user to doaway with numbering nodes andmeshes

• A function manager makes theinput of variable data much easier

• The control language isparametrizable

USER INTERFACE

AVAILABLE RESULTS

Time evolution of quantities such as node displacements, tension in cables, beam deflections,distances between “macro-cables”. Time animation and visualization of the structures at anyinstant in time.

AVAILABLE RESULTS

ELEMENTS

The large-displacement small-deformation formalism is applied to beams and cables. Cable elementshave two nodes and 4 degrees of freedom per node (3 translation d.o.f. and the tangent rotation).Bending is deliberately neglected so as to accelerate convergence of very slender structures.

A pulley element is available as well as the idea of a “macro-cable” (set of cable elements) to which afunction can be applied such as compliance with a maximum deflection or post-evaluation of theminimal distance between two “macro-cables”.

ELEMENTS

Moreover, these structures madeup of cable and beam elementscan be combined with themechanism, structural or usercomponents available inMECANO.

cable

macro

pulley

ring

beam

Starting from aclassical list of

specifications, HVSensures automatic

discretization, a well-ordered computation

and retrieval of theresults which give the

maximal reactionloads for each

external load patternchosen by the user.

HVS is a professional tool derivedfrom MECANO, which allows to

use it as a black box for typicalbus-bars (rigid or flexible) design

in substations.

HVS (HIGH VOLTAGE SUBSTATIONS)HVS (HIGH VOLTAGE SUBSTATIONS)

MISCELLANEOUS

• MECANO CABLE is available for UNIXand Windows NT.HVS is only available on UNIX.

• A user’s guide in English is available inHTML format.

MISCELLANEOUS

SAMTECH : Boulevard␣ Frère␣ Orban 25, B-4000␣ Liège, BelgiumTel. :␣ +32-4-252␣ 57␣ 77␣ –␣ Fax :␣ +32-4-253␣ 20␣ 09 – http://www.samcef.com

SAMTECH-France : Parc d’Activités du Pas du Lac, 6 avenue Ampère, 78180 Montigny le Bretonneux, FranceTel. : 01-30 58 47 47 – Fax : 01-34 60 90 00

TSE GmbH : Oskar-Kalbfell-Platz 8, D-72764 Reutlingen, GermanyTel. : +49-7121 92 20 0 – Fax : +49 7121 92 20 90

Photograph courtesy, R. Grooten, Janssen Eng., J. Lebois

(LERC,DGA, JANSSEN Eng.)