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Add Reference Guide page for Load object.
Update property editor panel for Load in the Users Guide.
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‎src/ReferenceGuide/htm/properties/load.htm‎

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<!doctype html public "-//ietf//dtd html//en">
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<!---
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SPDX-FileCopyrightText: 2023 SAP SE
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SPDX-License-Identifier: Apache-2.0
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This file is part of FEDEM - https://openfedem.org
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--->
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<html>
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<head>
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<link rel="stylesheet" href="/css/hhstyle.css" type="text/css">
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<script language="javascript" src="/script/syncurl.js"></script>
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</head>
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<body>
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<h5>
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<table width="100%" bgcolor="#3399cc" border="0" cellspacing="0" cellpadding="3"><tr><td>
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<img src="../../img/top1.png" width="200" height="16">
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</td></tr></table>
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</h5>
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<h1><a name="_load"></a>Load</h1>
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<p>The Load object is used to introduce motion in a FEDEM model
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through an external force.
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There are two types of loads in FEDEM:
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Forces (for translational motion) and Torques (for angular motion).
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The load is applied on a <a href="triad.htm">Triad</a> which can either be
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attached to a <a href="part.htm">Part</a> or a <a href="beam.htm">Beam</a>,
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or exist as an unattached triad connected to an axial
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<a href="spring.htm">Spring</a> and/or <a href="damper.htm">Damper</a>.</p>
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<p><img src="../../img/prp/load-1.png"></p>
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<p>The figure above illustrates the Load properties,
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which consist of the following items:</p>
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<p><table border="1">
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<tr bgcolor="#dbe5f1"><td><b>Name:</b></td><td><b>Description:</b></td></tr>
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<tr><td>Magnitude</td><td>In this field you can either enter a constant load
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value or select a <a href="function.htm">Function</a> from the pull-down list.
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<tr><td>Load target point</td><td>These fields display the coordinates of the
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Triad where the load attacks, referred to either the <i>Global</i> axes,
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or the <i>Local</i> axes of the Part the Triad is attached to.
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Click the
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<img src="../../img/icons/mouse.png" width="20" height="15">
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button to select a new load target point in the <i>Modeler</i> view.
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Click and hold the
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<img src="../../img/icons/eyes.png" width="20" height="15">
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button to highlight the load target point in the <i>Modeler</i> view.</td></tr>
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<tr><td>Direction</td><td>These fields are used to define the direction
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of the load. It is specified as the vector through two given points,
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<i>From</i> and <i>To</i>. Click the
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<img src="../../img/icons/mouse.png" width="20" height="15">
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buttons to select the <i>From</i> and <i>To</i> points.
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Click and hold the lower
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<img src="../../img/icons/eyes.png" width="20" height="15">
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buttons to highlight the currently used points in the <i>Modeler</i> view.
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Click and hold the upper
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<img src="../../img/icons/eyes.png" width="20" height="15">
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buttons to highlight the object (Part, Triad or Reference plane),
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the selected point is attached to.
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You may also type in the coordinate fields to adjust the point locations.
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</td></tr>
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</table></p>
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</body>
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</html>

‎src/ReferenceGuide/htm/properties/toc-desktop.hhc‎

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<param name="Name" value="Graph">
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<param name="Local" value="htm\properties\graph.htm">
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</OBJECT>
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<LI> <OBJECT type="text/sitemap">
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<param name="Name" value="Load">
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<param name="Local" value="htm\properties\load.htm">
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</OBJECT>
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<LI> <OBJECT type="text/sitemap">
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<param name="Name" value="Material">
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<param name="Local" value="htm\properties\material.htm">

‎src/ReferenceGuide/htm/properties/toc.hhc‎

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<param name="Name" value="Graph">
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<param name="Local" value="htm\properties\graph.htm">
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</OBJECT>
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<LI> <OBJECT type="text/sitemap">
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<param name="Name" value="Load">
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<param name="Local" value="htm\properties\load.htm">
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</OBJECT>
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<LI> <OBJECT type="text/sitemap">
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<param name="Name" value="Material">
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<param name="Local" value="htm\properties\material.htm">

‎src/ReferenceGuide/img/icons/eyes.png‎

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‎src/ReferenceGuide/img/icons/mouse.png‎

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‎src/ReferenceGuide/img/prp/load-1.png‎

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‎src/UsersGuide/Figures/force property editor panel.jpg‎

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‎src/UsersGuide/Figures/mouse button.jpg‎

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‎src/UsersGuide/mechanism_elements.tex‎

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\vskip\parskip
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\IconsText{force}{torque}{
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Two types of loads can be applied to triads or parts: forces and torques.
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Both types are applied as point-force vectors on FE nodes. These loads can be
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used to introduce motion into your mechanism. During simulation, the magnitude
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of forces and torques can be constant or controlled by functions
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(see \refSection{functions}{Functions}). When creating them,
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it is possible to add a load directly to an existing triad or to an FE node.}
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Two types of loads can be applied to triads or parts: Forces and Torques.
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Both load types are applied as point-force vectors on FE nodes.
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The loads can be used to introduce motion into your mechanism.
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During simulation, the magnitude of forces and torques can be constant
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or controlled by functions (see \refSection{functions}{Functions}).}
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When creating load objects, it is possible to add a load directly to an
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existing Triad, or to any FE node on a Part. In the latter case,
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a new Triad will be created and attached to the Part on the chosen FE node.
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\SubSection{Load symbols}{load-symbols}
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Select the force or torque to show its properties.
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\noindent
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\begin{picture}(243,100)
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\put(0,0){\includegraphics[width=\textwidth]{Figures/force property editor panel}}
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\put(35,82){\Bullet{1}}
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\put(50,63){\Bullet{2}}
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\put(150,85){\Bullet{3}}
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\put(102,55){\Bullet{4}}
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\put(102,33){\Bullet{5}}
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\put(-50,-72){\includegraphics[width=7mm]{Figures/mouse}}
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\put(-50,-185){\includegraphics[width=7mm]{Figures/eyes}}
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\begin{picture}(343,90)
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\put(0,0){\includegraphics[width=\textwidth]{\ReferenceImg/prp/load-1}}
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\put(45,82){\Bullet{1}}
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\put(70,54){\Bullet{2}}
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\put(170,82){\Bullet{3}}
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\put(108,43){\Bullet{4}}
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\put(219,45){\Bullet{4}}
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\put(324,45){\Bullet{4}}
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\put(108,21){\Bullet{5}}
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\put(219,23){\Bullet{5}}
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\put(324,23){\Bullet{5}}
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\put(219,69){\Bullet{6}}
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\put(324,69){\Bullet{6}}
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\put(313,-72){\includegraphics[trim=8 5 8 6,clip,width=5mm]{Figures/mouse}}
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\put(-50,-138){\includegraphics[width=7mm]{Figures/mouse}}
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\put(-50,-179){\includegraphics[width=7mm]{Figures/eyes}}
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\end{picture}
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\begin{bulletlist}
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\setlength\itemsep{1mm}
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\item{\sl Magnitude} --
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To change the load magnitude, enter a constant value or select one from the
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list of functions in your model (see \refSection{functions}{Functions}).
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To change the load magnitude, enter a constant value or select from the
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list of functions (see \refSection{functions}{Functions}).
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\item{\sl Load Target Point} --
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The point is given in either global or local coordinates.
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\item{\sl Load target point} --
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The point is given either in global coordinates, \newline
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or in local coordinates with respect to the Part the load is attached to.
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You can also select a new target point using the \textbf{Mouse} button
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(see \refSection{target-point}{Target point} below).
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(~~~~~), see \refSection{target-point}{Target point} below.
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\item{\sl Direction} --
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The {\sl From} and {\sl To} options allow you to edit the orientation of the
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load vector (see \refSection{direction}{Direction} below).
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\item
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You can select a new point for the {\sl Load Target Point}, or {\sl From}
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or {\sl To Directions} using the \textbf{Mouse} buttons
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(then select a new point in the {\sl Modeler} view).
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You can select a new {\sl Load target point}, and change the {\sl From} and
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{\sl To} points for the load {\sl Direction} using the \textbf{Mouse} buttons.
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The new point is then selected in the {\sl Modeler} view.
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\item
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You can click and hold down any of the \textbf{View} buttons in the Property
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Editor panel to highlight the corresponding point in the {\sl Modeler} view.
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\item
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Click and hold down these \textbf{View} buttons to highlight the Part or
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Triad defining the load direction in the {\sl Modeler} view.
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\end{bulletlist}
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\SubSection{Target point}{target-point}
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\IconTextFirst{../mouse}{
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To specify a new target point, click the \textbf{Mouse} button and use the
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cursor to select a part in the {\sl Modeler} view.
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If the target point does not coincide with an FE node, the target point will
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snap to the closest node. Press \textbf{Done} to confirm the selection.
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A triad is created at that position.}
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To specify a new target point, click the \textbf{Mouse} button and
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select a Part in the {\sl Modeler} view.
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If the clicked point does not coincide with an FE node, it will
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snap to the closest node in the selected Part.
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Press \textbf{Done} to confirm the selection.
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A triad is created at that position.
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You may also select an existing Triad which is not attached to a Part.}
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\SubSection{Direction}{direction}
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\RightFigure{4-Direction-text}{
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The direction of the input load vector can be specified by two points moving
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together with the selected parts, or by two fixed points given
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The direction of the load vector can be specified by two points moving
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together with the selected Parts or Triads, or by two fixed points given
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in global coordinates. The direction is given by the vector pointing
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from the {\sl From} point to the {\sl To} point (shown at right).}
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from the {\sl From} point to the {\sl To} point, as shown to the right.}
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