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1 +Footfall analysis
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1 +New features.New in FEM-Design 18.WebHome
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1 -XWiki.XWikiGuest
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1 +en
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1 +Contents
2 +
3 +{{toc depth="2" start="2"/}}
4 +
5 +
6 +----
7 +
8 +A new calculation method - **Footfall analysis** is implemented in FEM-Design 18. This calculation method allows for checking the structure's response for an excited vibration.
9 +
10 +
11 +== Download ==
12 +
13 +
14 +Get familiar with the theory behind the footfall analysis and verification examples: [[Footfall analysis - theory and verification examples>>http://download.strusoft.com/FEM-Design/inst180x/documents/footfall_theory.pdf]]
15 +
16 +
17 +== Video presentation ==
18 +
19 +
20 +Watch the video presentation of the Footfall analysis feature.
21 +
22 +{{video url="https://youtu.be/TZA0Zxa-j9s" ratio="16:9"/}}
23 +
24 +
25 +
26 +== Webinar ==
27 +
28 +
29 +Watch the webinar, where the Footfall analysis is described in details.
30 +
31 +
32 +{{video ratio="16:9" url="https://www.youtube.com/watch?v=E3spcRJ6u4c"/}}
33 +
34 +
35 +
36 +(% id="HDefinition" style="text-align: justify;" %)
37 +== Definition ==
38 +
39 +
40 +**Self excitation** region or **Full excitation** point shall be defined in Loads -> Footfall analysis data. It is required that masses are defined, since Eigenfrequency calculation will be executed during Footfall analysis.
41 +
42 +(% style="margin:0cm 0cm 8pt" %)
43 +[[image:1547216648147-301.png||height="325" width="747"]]
44 +
45 +== Calculation ==
46 +
47 +
48 +The calculation can be started in Analysis/Calculations/Footfall analysis. The settings for the calculation can be found under the Setup.... Here one can select one of the three available methods:
49 +
50 +* Self excitation
51 +* Full excitation
52 +* Rhythmic crowd load*
53 +
54 +(% style="text-align: justify;" %)
55 +*Load case shall be selected with this method.
56 +
57 +(% style="text-align: justify;" %)
58 +[[image:1547215968378-349.png||height="589" width="1067"]]
59 +
60 +(((
61 +(% class="box warningmessage" %)
62 +(((
63 +It is important to choose the correct method (**Self excitation**, **Full excitation** or **Rhythmic crowd load**), because the analysis will run according to the selected method, even though it’s possible to define both self excitation regions and full excitation points.
64 +)))
65 +)))
66 +
67 +
68 +(% style="margin: 0cm 0cm 8pt;" %)
69 +== Results ==
70 +
71 +
72 +After Footfall calculation, one can check the Eigenfrequency results (masses, vibration shapes), the nodal accelerations and the nodal response factors.
73 +
74 +(% style="margin:0cm 0cm 8pt" %)
75 +[[image:1547216178765-957.png||height="415" width="782"]]
76 +
77 +
78 +In //Detailed result// one can see the response factor – frequency diagram of a point, if a //Response factor// or //Acceleration// result is shown. Every previously placed point is remembered and named. These points can be deleted with Delete option. Their name and font can be set by //Properties //option.
79 +
80 +(% style="margin:0cm 0cm 8pt" %)
81 +[[image:1547734518778-950.png||height="512" width="941"]]
82 +
83 +
84 +(% style="text-align: justify;" %)
85 +These results can be listed in Analysis/Footfall analysis.
86 +
87 +
88 +== Reference ==
89 +
90 +
91 +* [[Footfall analysis - theory and verification examples>>http://download.strusoft.com/FEM-Design/inst180x/documents/footfall_theory.pdf]]
92 +* [[Footfall analysis - video presentation>>https://youtu.be/TZA0Zxa-j9s]]
93 +* [[Footfall analysis - webinar>>https://www.youtube.com/watch?v=E3spcRJ6u4c&list=PLX-NOd6ztACyqVn-o7p-az344n4J037Ff&index=24]]
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