| Abstrakt: |
In this paper the dynamic response, vibration isolation, and sound radiation of a resiliently supported track slab are analyzed. An analytical model is investigated which views railroad rails as beams fastened elastically to a slab which is resiliently mounted to a substructure. The slab is assumed to be a plate of finite width and infinite length. The analysis accounts for several different mechanisms of vibration transmission from the rail to slab, including structural nearfield, farfield, and coincidence effects. The results show that the slab is expected to be a very effective vibration isolator but will also behave like a sounding board at low frequencies. By proper choice of rail and slab parameters, this low-frequency radiation may be made comparable to the low-frequency sound ordinarily radiated by an electrically powered rail vehicle. [ABSTRACT FROM AUTHOR] |
