This is the description of the test cases performed with STEM.

The soft soil case is based on a cross section in Schalkwijk, the stiff case on a cross section in Holten.

Cross section for the soft and stiff soil case Figure - Cross section for the soft and stiff soil cases

The following table gives an overview of the test cases that are performed. The table indicates whether the test case is performed for the stiff and/or soft case.

Test caseTest descriptionHow to model in STEMStiff caseSoft case
1Stiffnening of the railChange the stiffness of the rail element by a factor 2✓✓
2Concrete slab under the ballastChange the material properties✓✓
3Composite sleepersChange the mass of the sleepers✓✓
4Geometry of the embankmentChange the coordinates of the embankment point✓
5Deepwall (diepwand) of EPSChange the material properties✓
6Effect of the primary suspension parametersChange the train primary stiffness by a factor 2✓✓
7Effect of soil propertiesChange the top layer Young modulus by a factor 2✓✓
8Effect of rail roughnessChange the Av factor by a factor 10✓✓
9Effect of train speedChange the speed to 160 / 3.6 m/s and calculation time✓✓
10Comparison between rail types E54 and E60Change rail type✓✓
11PSS soil layerChange the material properties✓✓
12Under sleeper padsChange the stiffness and damping of the railpad✓✓
13Effect of water ditchChange the material properties✓
14Effect of ballast stiffnessChange the Young modulus by a factor 2✓✓
15Effect of embankment stiffnessChange the Young modulus by a factor 2✓
16Effect of Rayleigh dampingChange the damping stiffness parameter to 0.000104✓✓
17Effect of secondary suspension parametersChange the train secondary stiffness by a factor 2✓✓
18Train vs moving loadsChange the UVEC train to moving loads✓✓
19Effect of the unsprung massChange the whell mass by a factor of two✓✓
20Effect of layeringChange the coordinates of the layers✓
21Combine 1 & 19Change parameters✓✓
22Train secondary dampingChange the train parameters✓✓