VTT

Verification Test Cases
 

Version

IMO Test Cases

Programme version

These verification cases have been run using the FDS6 (version 6.5.3) based version of the evacuation programme (Evac 2.5.2), GIT Revision: FDS6.5.3-937-gee70904.

IMO Test Cases

Test cases defined by IMO MSC/Circ.1238 (30 October 2007) 'Guidelines For Evacuation Analyses for New and Existing Passenger Ships', Annex 3. Note, that the figures on this page are just for illustrative purposes only. They are not made with the latest version of the FDS+Evac, but they show the geometry used in the test case calculations. All IMO test cases are component and qualitative verification/validation test cases. FDS+Evac is a stochastic evacuation modelling programme, where, e.g., the properties of the agents are generated using random distributions, so each FDS+Evac run will produce a (little bit) different result. Doing a quantitative validation would require that many FDS+Evac simulations would be performed and their results analyzed, but for these qualitative tests it is enough to perform just a single FDS+Evac run for each of the test cases.

All IMO-test cases use the standard FDS+Evac human parameters unless otherwise stated. In some cases, the IMO specified males of 30-50 years (Table 3.4. in MSC/Circ.1238, Annex 2) are used, which specify walking speed on flat terrain:
Minimum walking velocity = 0.97 m/s
Maximum walking velocity = 1.62 m/s
Uniform distribution

Component Test 1 Test 1: Component testing
Maintaining set walking speed in a corridor.
fds file
Result file
Component Test 2b Tests 2 and 3: Component testing
Maintaining set walking speed in stairs. (2: up, 3: down) 2 m wide, 10 m long along the incline, 1.0m/s. Here, only case 2 is presented, because in FDS+Evac the corridor/stairs algorithm is exactly the same for going up or down the stairs. There are many different ways to define stairs in FDS+Evac: a) using a 'CORR' element, b) defining stairs as an incline 'EVSS' leading to a next floor level, c) defining stairs as an incline 'EVSS' and the next floor level is defined using a horizontal 'EVSS'.
Case a: fds file
Case b: fds file
Case c: fds file
Result file
Component Test 4 Test 4: Component testing
Exit flow rate. Two different human parameter sets, Adult 1 and 2, are used and the resulting human flows are compared. Adult 1 is the standard 'Adult' defined in FDS+Evac, Adult 2 has L_NON_SP=0.3.
fds file (Adult 1)
fds file (Adult 2)
Results
Component Test 5 Test 5: Component testing
Response time, uniform 10-100 s.
fds file
out file
Response time, LogNormal, IMO Circ.1238 Night and Day: The geometry of the test case 9 is used, because there are more agents (1000).
fds file
Results
Component Test 6 Test 6: Component testing
Rounding corners.
fds file
Component Test 7 Test 7: Component testing
Demographics. Note that also the test case 9a results are used, because there are 1000 agents compared to 50 in the test case 7. The gender and age group dependent walking speeds given in the IMO Annex 2 Table 3.4 are also tested.
Case 7, 50 agents: fds file, out file
IMO Annex 2 Table 3.4: fds file, out file
Results
Component Test 8b Test 8: Qualitative verification
Counterflow between two rooms.
Case A: (fds file, out file) Step 1, 0 at right (50.01 s)
Case B: (fds file, out file) Step 2, 10 at right (75.04 s)
Case C: (fds file, out file) Step 2, 50 at right (106.85 s)
Case D: (fds file, out file) Step 2, 100 at right (136.14 s)
Component Test 9c Test 9: Qualitative verification
Exit flow from a large public room. The specific flow rates (humans per metre per second) are calculated using times when 300th and 700th persons exit the room.
Case A: (fds file) Step 1: All doors open: 220.74 s, 1.19 1/m/s.
Case B: (fds file) Step 2: Doors 1 and 2 closed: 412.86 s, 1.23 1/m/s.
Case C: (fds file) Step 1: All doors open: 171.32 s, 1.67 1/m/s, L_NON_SP=0.5
Case D: (fds file) Step 2: Doors 1 and 2 closed: 322.85 s, 1.67 1/m/s, L_NON_SP=0.5
Results
Component Test 10 Test 10: Qualitative verification
Exit route allocation.
fds file, thick walls
fds file B, thin walls
Component Test 11 Test 11: Qualitative verification
Staircase
fds file

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