138 Investigation of form effect on ballast mechanical behavior based on discrete element modeling
Investigation of form effect on ballast mechanical behavior based on discrete element modeling 139 Appendix Fig. 10. Get the three orthogonal dimensions a, b and c of the form
Vertex list on polyhedron
Maximum distance a The two vertexes defining maximum
distance a Find maximum distance a (distance
betw een v ertaxes on the polyhedron) Vertex list on
polyhedron
Maximum distance a The two vertexes defining maximum
distance a
Vertex list on plane Get normal direction of proj ecting plane
and proj ect all v ertexes on the plane
Vertex list on plane
Maximum distance c Find maximum distance c (distance
betw een v ertexes on the proj ecting line)
Maximum distance c Maximum distance b
The two vertexes defining maximum
distance b Find maximum distance b (distance
betw een v ertexes on the proj ecting plane)
Maximum distance b The two vertexes defining maximum
distance b
Vertex list on line Get normal direction of proj ecting line and
proj ect all v ertexes on the line
Vertex list on line See Appendix Fig. 11
140 Investigation of form effect on ballast mechanical behavior based on discrete element modeling Appendix Fig. 11. Find maximum distance between two vertexes in vertex list
Select one combination randomly
Calculate the distance Vertex list
List all combinations tw o v ertexes in the v ertex list Vertex list
Maximum value
Two vertexes define the maximum value: Integer Output the maximum
v alue
Maximum value
Two vertexes define the maximum value: Integer Renew the maximum
v alue Is the distance bigger than the current maximum value?
Are all combinations checked?
[Yes]
[No]
[No]
[Yes]
Investigation of form effect on ballast mechanical behavior based on discrete element modeling 141
Appendix V: Explanation of Unified Modeling Language (UML) sym-bols used in Enterprise Architecture (EA)
Start of an activity diagram
End of an activity diagram
End of a flow
Preformed activity / sub-activity in the dissertation
Input / output / return parameter of an activity
Join
Flow from one activity to the other Realization
Component “This dissertation” and “Fu-ture works”
Things done in this dissertation or could be done in the future
pkg Future w orks
Activity initial act The complet...
Activity final act Get the thr...
Flow final
act Generate the form
Activ ity
act Generate the form
Sub-activ ity
act The complete w orkflow ...
Ballast geometrical specifications from railway standards
act The complete w orkflow of t...
15 form databases with different form
distributions act The complete w orkflo...
Optimized ballast aggregate act The complete w orkflow of the ...
pkg Future w orks
Class1 Class2
cmp Future w orks
Packaging Component
cmp Future w orks
Component
142 Investigation of form effect on ballast mechanical behavior based on discrete element modeling
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