AVEVA E3D 2.1 Volume Modelling -Chapter 8

CHAPTER 8 8

Volume Modelling

Volume Models are similar to EQUI elements. They may be used for modelling any item in AVEVA E3D that will be constructed from primitives but is not required to be displayed in the Model Explorer as an EQUI element.  A typical use of volume models may include plant Civils items (e.g. concrete slabs, concrete plinths, site roads) or the modelling of escape routes/access obstruction volumes. Volume models can also be used as a method of reserving space within the plant layout for equipment items not yet ready for modelling.

8.1

The Volume Model Hierarchy

Volume Model ( Model (VOLM VOLM)) elements are owned by ZONEs. ZONEs. VOLM  VOLM  elements have some of the attributes of an EQUI and may own primitives directly, with the exception of Nozzles. VOLM  VOLM  elements may own one or more optional Sub-Volume Model (SVOLM) SVOLM) elements which may own any primitive except Nozzles. The SVOLM elements are used to break down Volume Models into sub-parts and are similar, and have some of the same attributes, as SUBE elements.

8.2

Creating VOLM and SVOLM Elements

On the GENERAL tab, GENERAL tab, in the Volumes group, Volumes group, clicking the Volume button displays the Volume Model form. Model form. The form is similar to the Create Equipment form described earlier in the training guide, except that there is no Attributes…  button as VOLM elements do not have the attributes that are set by this option. VOLM  VOLM  elements may be named and positioned, the option lists and textboxes enable its origin to be set with respect to any element, as for an EQUI element.

With a VOLM as VOLM as the CE, on the GENERAL  GENERAL  tab, in the Volumes  Volumes  group, clicking the Sub-Volume  button displays the Sub Volume Model form. Sub-Volume button Model form. This form is similar to the Create Sub-equipment form Sub-equipment form described earlier in this training guide. SVOLM  SVOLM  elements may be named and positioned, the option lists and textboxes enable its origin to be set with respect to any element, as for a SUBE element.

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8.3

Creating Primitives

 All primitives, except NOZZ elements may be owned directly by VOLM or by SVOLM elements. Primitives are created and modified using the functions on the EQUIPMENT tab.

8.4

Creating Volume and Sub Volume Models  – A Worked Example

In the Training project all of the civil works and foundations are modelled using Volume Models and are created in suitable Civils SITEs. Only members of the Civils team have access to these SITEs. In order to carry out the worked examples and exercises it is necessary to switch user. On the TOOLS  tab, in the Training  group, click the Setup  button to display the Training Setup  form. Navigate to the Setup Tools tab and enter the following details for the new user: Username: A.CIVILMAN Password: A Click the Switch User  button and close the form. In this worked example volume models are added to the Civils works to represent reserved walkway areas which in reality have no physical geometry but need to be used during clash checking to ensure appropriate room and access is available for plant personnel and machinery.

8.4.1

Creating the Walkway UDET

Clear the 3D View and add /ZONE-CIVIL-AREA01 to it. On the TOOLS tab, in the Display group, click the Commands button to display the Command Window. In the Command Window enter NEW :WALKWAY /AREA01-WALKWAYS. This creates a user defined element with the base type VOLM.

 User Defined Element Types can only be created using the Command line. The User Defined Element Type :WALKWAY has been previously defined in the Lexicon module. Query the attributes and note that the ActType is :WALKWAY and the Type is VOLM.

In the Modify group, of the HOME tab, from the Move button option list, click the Position button to display the Explicit Position form. Enter the Explicit Position West 318000 North 302500 Up

100000.

Click the Apply button and close the form.

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8.4.2

Creating the Walkway Primitives

The walkways will be made with a combination of BOX and Extrusion primitives. Extrusions are 2D shapes that are extruded through a distance. An extrusion is made up of three elements: 





EXTR  – the extrusion itself. The Position attribute holds the World position of the extrusion origin and the Height attribute holds the extrusion distance. LOOP  –  this is the 2D shape that owns a series of vertices, one at each change in direction of the shape. VERT  – these are the vertices. Their position is expressed in local co-ordinates, i.e. with respect to the EXTR origin.

From the EQUPMENT tab, Defaults  group, change the Representation style to Obstruction  and the Obstruction level to Soft In the Create group, pick Extrusion from the second row of the Primitives gallery. Enter E 0 N 0 U 0 into the co-ordinates to define the first point at the origin of the WALKWAY.

Using the Contextual Editor , continue creating the remaining vertices using the data from the following table. All vertices are at ground level, i.e. U 0.

Vertex No.

East

North

2

13000

0

3

13000

-13490

4

11500

-13490

5

11500

-1100

6

0

-1100

 After creating vertex 6, press the Return  key to advance.

When prompted for the height, input 2600.

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Right click the extrusion in the Model Explorer   and click Rename. Using the rename element form, name the extrusion WW-01_1. On the VIEW tab, in the Settings group, click the Graphics button to display the Graphics Settings form. On the Representation tab, select 50% from the Obstruction/Visibility Translucency options list and click the Apply button to display the walkway.

Close the Graphics Settings form.

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The next step is to add a second walkway. This will be modelled as a box. Set the Defaults to Obstruction Volume and the Obstruction Level to Soft. Enter the box creation function from the button in the primitives gallery, then press the down arrow and choose the Explicit option. Choose the origin at these co-ordinates E  -316250mm N  293880mm U 101300mm.

Then define the following dimensions: Xlength

1500mm

 Ylength

9600mm

Zlength

2600mm

Name the box WW-01_2.

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Exercise 7 Create Stairway Volumes The Equipment Support structure in  /ZONE-STRUCTURAL-AREA01 requires access stairs which will be added as a separate design process. Using Volume models create a suitable reserved volume for these stairs which can be also used as an access reservation volume once the stairs are modelled. Two flights of stairs should be modelled as two extrusions. The top flight is 1130mm wide and the bottom 1260mm wide. The positions, wrt World, for the required vertices are shown below. Ensure that the extrusions are set as Obstruction Volume and Soft. Both extrusions should sit under a single VOLM named STWAY-001, each extrusion should be named STWAY-001_1 and STWAY-001_2.

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