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Selected results of linear modal analysis using FEM_
| The first group of natural forms of vibrations | ||
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| The second group of natural forms of vibrations | ||
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| The third group of natural forms of vibrations | ||
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Parameters of the numerical models of the considered vehicles_
| Vehicle model | Model A | Model B |
|---|---|---|
| Basic natural frequencies | 2.3 Hz | 7.5 Hz |
| Number of generalised nodal displacements | 5 | 5 |
| Concentrated masses in the place of the axles | M1=1.265 t | M1=1.265 t |
| M2=2.415 t | M2=2.415 t | |
| M3–5=1.840 t | M3–5=1.840 t | |
| Suspension rigidity | k1=263.9 kN/m | k1=2806.0 kN/m |
| k2=503.8 kN/m | k2=5357.0 kN/m | |
| k3–5=383.9 kN/m | k3–5==4082.0 kN/m | |
| Suspension damping | c1=3.654 kN/(m·s) | c1==11.920 kN/(m·s) |
| c2=6.976 kN/(m·s) | c2=22.750 kN/(m·s) | |
| c3–5=5.315 kN/(m·s) | c3–5=17.330 kN/(m·s) |
Summary of material parameters of the steel and reinforced concrete parts of the bar elements of the FEM model_
| Material characteristics | Steel girder | Reinforced concrete slab | |||
|---|---|---|---|---|---|
| Self-weight (volumetric weights additionally take into account the weight of the span's bracings and the spans’ equipment) | γ | 82.6 |
| 29.6 |
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| Young's modulus | E | 210,000.0 |
| 36000.0 |
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| Shear modulus | G | 80,769.0 |
| 15000.0 |
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| Poisson ratio | μ | 0.3 | ( - ) | 0.2 | ( - ) |