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3-Visitor

## USE OF GRAPH

HI, PLEASE LET ME KNOW USE OF &quot;GRAPH&quot;,AND WHERE IT IS COMMOMLY USED. THANKS, HARI
6 REPLIES 6
Graphs are regularly used to drive geometry in a Variable Section Sweep. More specifically, a graph typically controls a dimension which continuously changes as the sweeping section follows the primary driving trajectory of the Variable Section Sweep. In this context a graph is used in conjunction with the specific parameter trajpar which varies continuously from 0 to 1 as the section follows the primary trajectory. That is, it has value 0 at the start point of the Sweep, value 0.5 half way along the trajectory, and value 1.0 at the end. Usually this arbitrary 0-to-1 range is multiplied by some factor appropriate to the particular geometry. The graph itself is invoked using the specific EVALGRAPH call followed by the name of the graph in quotes, comma-delimited, then linked to the factor-multiplied trajpar parameter. A graph can be very powerful and useful because you can sketch a varying graphical relationship using lines, arcs, and splines that would be impossible to capture in a simple equation. This is an overview. For more detail look at Variable Section Sweep articles in the Help files and on the PTC website. You should find examples there. Good luck! These can be a lot of fun. David
3-Visitor
(To:DavidButz)
thank you David,
3-Visitor
(To:HarikrishnanR)
Hi David, My intension is to control the Francis impeller vane thickness at 3 point (back shroud, middle, front shroud). My doubt is whether we are linking vane thickness to Graph through relation or any other?? Please let me know. Thanks Hari
1-Newbie
(To:DavidButz)
Hari, Speaking of Swept Blends, they may be made with Optional Area Control. You could define the 3 sections you need, then define specific area values at other intermediate points along the trajectory. Check this link, or type in &quot;howto&quot; in the Support section of the PTC Website, and filter to ProE/WF3/FEATURE: http://www.ptc.com/cs/cs_26/howto/agf2782/agf2782.htm Might be of some use to you. David
3-Visitor
(To:DavidButz)
hi sir, Thank you very much for the tips!.I went through graph method,it is really good. we are creating francis vane by using cylindrical co-ordinates points.usually there are minimum 13 points in radial direction ,and axially we are controlling the thickness of the vane at three sections(A,B,C(BOARD SIDE OF FRANCIS VANE)).we r creating vane using boundary blend.but in particular case they(client) want graph method . once again thanks for ur help. thanks and regards, hari
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