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Success with ModelSmart3D Pre-Engineering Software Corporation Written by: Robert A. Wolf III, P.E. Copyright 2001, Pre-Engineering Software Corporation,

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Presentation on theme: "Success with ModelSmart3D Pre-Engineering Software Corporation Written by: Robert A. Wolf III, P.E. Copyright 2001, Pre-Engineering Software Corporation,"— Presentation transcript:

1 Success with ModelSmart3D Pre-Engineering Software Corporation Written by: Robert A. Wolf III, P.E. Copyright 2001, Pre-Engineering Software Corporation, All Rights Reserved Show 3

2 Success with ModelSmart3D - Part VI Slide No. 2 Series Outline Show # 1 I.Possible benefits II.Introduction to bridge trusses III.Modeling for structural analysis Show # 2 IV.Using ModelSmart3D V.Extra for Experts Show # 3 VI.Optimization VII.Printing Show # 4 VIII.Building Your Model Show # 5 IX.Final Project

3 Success with ModelSmart3D - Part VI Slide No. 3 VI. Optimization 1.Overall Geometry of the Structure 2.Characteristics of the Individual Elements.

4 Success with ModelSmart3D - Part VI Slide No. 4 VI. Optimizing - Geometry 1.Geometry - Form and Height Super Structure Overhead Under Slung Height Taper NoTaper

5 Success with ModelSmart3D - Part VI Slide No. 5 VI. Optimizing - Elements Element – Orientation, Material Grade and Cross Section Orientation Element Connection Details Angle Direction Material Grade -Density Cross Section Element Length

6 Success with ModelSmart3D - Part VI Slide No. 6 Our Example We are designing a 12 span bridge that will be tested by a 20 pound weight hung from a 4x2 3/4x3/4 test block placed at the center of the span.

7 Success with ModelSmart3D - Part VI Slide No. 7 Optimizing Geometry - Truss Height

8 Success with ModelSmart3D - Part VI Slide No. 8 Delete Miscellaneous Bracing

9 Success with ModelSmart3D - Part VI Slide No. 9 Move Origin to Left Front Joint

10 Success with ModelSmart3D - Part VI Slide No. 10 Open the Joint Properties Dialog

11 Success with ModelSmart3D - Part VI Slide No. 11 Change Bridge Height

12 Success with ModelSmart3D - Part VI Slide No. 12 Re-analyze Model

13 Success with ModelSmart3D - Part VI Slide No. 13 Adjust Compression Member Length

14 Success with ModelSmart3D - Part VI Slide No. 14 Member Failure Modes Tension Compression Pulling Apart Buckling Crushing

15 Success with ModelSmart3D - Part VI Slide No. 15 Finish New Bridge Geometry

16 Success with ModelSmart3D - Part VI Slide No. 16 Re-Analyze Model

17 Success with ModelSmart3D - Part VI Slide No. 17 Optimizing the Element - Material Grade Voids and Wood Fiber More Voids - Less Wood Fiber Lighter and Weaker Same Cross Sectional Area End View of Balsa Wood Stick

18 Success with ModelSmart3D - Part VI Slide No. 18 Determining material grade The Density Method 1.Number each balsa stick. 2.Weigh each balsa stick – in grams. (Record the weight and size of each stick.) 3.Calculate the density of each stick. 4.Classify each stick by grade. 5.Place a grade mark on each stick.

19 Success with ModelSmart3D - Part VI Slide No. 19 Density Method Example 1.Number the stick 2.Weigh the stick From balance: 2.55 grams

20 Success with ModelSmart3D - Part VI Slide No. 20 Example Continued 3.Calculate the density (Wt/Vol.). Volume of the stick: Change units to ft 3 :

21 Success with ModelSmart3D - Part VI Slide No. 21 Example Continued Weight of the stick = 2.55 grams Change units to pounds:

22 Success with ModelSmart3D - Part VI Slide No. 22 4.Classify From Table pg 10-3 Grade = BalsaD1.2 5.Apply Grade Mark

23 Success with ModelSmart3D - Part VI Slide No. 23 Using Exact Density Open the Edit Material Dialog.

24 Success with ModelSmart3D - Part VI Slide No. 24 Material Grade

25 Success with ModelSmart3D - Part VI Slide No. 25 Final Design!

26 Success with ModelSmart3D - Part VII Slide No. 26 VII. Printing

27 Success with ModelSmart3D - Part VII Slide No. 27 Move the XY GuidePlane

28 Success with ModelSmart3D - Part VII Slide No. 28 Show Tiles

29 Success with ModelSmart3D - Part VII Slide No. 29 Move Tiles

30 Success with ModelSmart3D - Part VII Slide No. 30 Print the Tiles

31 Success with ModelSmart3D - Part VII Slide No. 31 End Of Show 3


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