/[ascend]/trunk/models/vessel.a4c
ViewVC logotype

Contents of /trunk/models/vessel.a4c

Parent Directory Parent Directory | Revision Log Revision Log


Revision 109 - (show annotations) (download) (as text)
Wed Dec 14 00:34:09 2005 UTC (18 years, 5 months ago) by johnpye
File MIME type: text/x-ascend
File size: 4073 byte(s)
Standardising all currency amounts to ISO 4217. USdollar and dollar
replaced by USD in all models in the library.
1 REQUIRE "atoms.a4l";
2 (* => atoms.a4l, measures.a4l, system.a4l, basemodel.a4l *)
3 PROVIDE "vessel.a4c";
4 (*
5 * This file is part of the ASCEND Modeling Library and is released
6 * under the GNU Public License as described at the end of this file.
7 *)
8
9 MODEL vessel;
10
11 (* variables *)
12 side_area, end_area IS_A area;
13 vessel_vol, wall_vol IS_A volume;
14 wall_thickness, H, D IS_A distance;
15 H_to_D_ratio IS_A factor;
16 metal_density IS_A mass_density;
17 metal_mass IS_A mass;
18
19 (* equations *)
20 FlatEnds: end_area = 1{PI} * D^2 / 4;
21 Sides: side_area = 1{PI} * D * H;
22 Cylinder: vessel_vol = end_area * H;
23 Metal_volume: (side_area + 2 * end_area) * wall_thickness = wall_vol;
24 HD_definition: D * H_to_D_ratio = H;
25 VesselMass: metal_mass = metal_density * wall_vol;
26
27 METHODS
28
29 METHOD defaults;
30 H_to_D_ratio := 2;
31 END defaults;
32
33 METHOD clear;
34 side_area.fixed := FALSE;
35 end_area.fixed := FALSE;
36 vessel_vol.fixed := FALSE;
37 wall_vol.fixed := FALSE;
38 wall_thickness.fixed := FALSE;
39 H.fixed := FALSE;
40 D.fixed := FALSE;
41 H_to_D_ratio.fixed := FALSE;
42 metal_density.fixed := FALSE;
43 metal_mass.fixed := FALSE;
44 END clear;
45
46 METHOD specify;
47 vessel_vol.fixed := TRUE;
48 H_to_D_ratio.fixed := TRUE;
49 wall_thickness.fixed := TRUE;
50 metal_density.fixed := TRUE;
51 END specify;
52
53 METHOD reset;
54 RUN clear;
55 RUN specify;
56 END reset;
57
58 METHOD values;
59 vessel_vol := 250 {ft^3};
60 wall_thickness := 5 {mm};
61 metal_density := 13000 {kg/m^3};
62 END values;
63
64 END vessel;
65
66 MODEL vessel_optimize REFINES vessel;
67
68 cost IS_A monetary_unit;
69 a IS_A cost_per_volume;
70
71 obj1def: cost = a * wall_thickness * (side_area + 2*(4/1{PI})*end_area);
72
73 obj1: MINIMIZE cost;
74
75 METHODS
76
77 METHOD clear;
78 side_area.fixed := FALSE;
79 end_area.fixed := FALSE;
80 vessel_vol.fixed := FALSE;
81 wall_vol.fixed := FALSE;
82 wall_thickness.fixed := FALSE;
83 H.fixed := FALSE;
84 D.fixed := FALSE;
85 H_to_D_ratio.fixed := FALSE;
86 metal_density.fixed := FALSE;
87 metal_mass.fixed := FALSE;
88 cost.fixed := FALSE;
89 a.fixed := FALSE;
90 END clear;
91
92 METHOD specify;
93 vessel_vol.fixed := TRUE;
94 wall_thickness.fixed := TRUE;
95 metal_density.fixed := TRUE;
96 a.fixed := TRUE;
97 END specify;
98
99 METHOD min_cost;
100 RUN clear;
101 RUN specify;
102 END min_cost;
103
104 METHOD values;
105 vessel_vol := 250 {ft^3};
106 wall_thickness := 5 {mm};
107 metal_density := 13000 {kg/m^3};
108
109 (* a is the cost per cubic foot of metal. rather arbitrary. *)
110 a := 10 {USD};
111 END values;
112
113 END vessel_optimize;
114
115 (*
116 * vessel.a4c
117 * by Arthur W Westerberg, Benjamin A Allan
118 * Part of the ASCEND Library
119 * $Date: 1998/06/17 19:35:43 $
120 * $Revision: 1.3 $
121 * $Author: mthomas $
122 * $Source: /afs/cs.cmu.edu/project/ascend/Repository/models/vessel.a4c,v $
123 *
124 * This file is part of the ASCEND Modeling Library.
125 *
126 * Copyright (C) 1998 Carnegie Mellon University
127 *
128 * The ASCEND Modeling Library is free software; you can redistribute
129 * it and/or modify it under the terms of the GNU General Public
130 * License as published by the Free Software Foundation; either
131 * version 2 of the License, or (at your option) any later version.
132 *
133 * The ASCEND Modeling Library is distributed in hope that it
134 * will be useful, but WITHOUT ANY WARRANTY; without even the implied
135 * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
136 * See the GNU General Public License for more details.
137 *
138 * You should have received a copy of the GNU General Public License
139 * along with the program; if not, write to the Free Software
140 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139 USA.
141 *)

john.pye@anu.edu.au
ViewVC Help
Powered by ViewVC 1.1.22