Acoustic optimisation of the rail track by targeted variation of continuous superstructure parameters along the track

Open Access

Figure 4

Resulting TDRs for optimised variation schemes for single variations: Stochastic variation of the sleeper spacing. (a) Periodic variation of pad stiffness. (b) Periodic variation of sleeper mass. (c) Periodic variation of sleeper spacing. (d) Stochastic variation of all three superstructure properties with the standard deviations $σ_{s_{p}} = 223.7 MN / s, σ_{m_{s}} = 26.8 kg$ ${\sigma }_{{s}_{\mathrm{p}}}=223.7\mathrm{\enspace MN}/\mathrm{s},{\sigma }_{{m}_{\mathrm{s}}}=26.8\mathrm{\enspace kg}$ and $σ_{d_{s}} = 0.109 m$ ${\sigma }_{{d}_{\mathrm{s}}}=0.109\mathrm{\enspace m}$ .

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