As depicted in Figure 9(a), the maximum vertical wheel-track receptance difference at different positions along the rail at the pinned-pinned frequency of 1020 Hz is 2.65 x [10.sup.-9] m/N at midspan, and the minimum value is 1.39 x [10.sup.-9] m/N on support; the difference between them is 1.26 x [10.sup.-9] m/N.
The increase of the rail mass attenuated the vibration level of the rail at low frequency.
Theoretical Simulation and Experimental Investigation of a Rail Damper to Minimize Short-Pitch Rail Corrugation
Hippie jump the five-stair rail at Trinity Church at Copley Square
--I skated a BMX track and hucked my barefooted carcass onto the 12-stair rail at San Diego City College.
Triple threat
high marks on the tape (see inset photo), and mark along the underside of the
rail at each stud location.
Rock-solid stair rail: so strong it's kid-proof! We'll show you how
Figures 9(a) and 9(b) show the vertical and lateral dynamic flexibility characteristic on different positions on the rail at different frequencies, respectively.
The curve of vertical and lateral wheel-rail dynamic flexibility difference with half of fastener spacing on different positions along the rail at pinned-pinned frequency is shown in Figure 13.
As shown in Figure 13(a), the maximum vertical wheel-rail dynamic flexibility difference on different positions along the rail at the pinned-pinned frequency of 1,020 Hz is 2.65 x [10.sup.-9] (m/N) appearing in mid-span; and the minimum value is 1.39 x [10.sup.-9] (m/N) appearing above the fastener; the difference between them is 1.26 x [10.sup.-9] (m/N).
As shown in Figure 13(b), the maximum lateral wheel-rail dynamic flexibility difference on different positions along the rail at the pinned-pinned frequency of 440 Hz is 1.29 x [10.sup.-8] (m/N) appearing in mid-span; the minimum value is 9.74 x [10.sup.-10] (m/N) appearing above the fastener; the difference between them is 1.1926 x [10.sup.-8] (m/N).
Based on the "wheel-rail dynamic flexibility difference" mechanism, through the research on the vertical and lateral dynamic flexibility characteristics within the range of 0~1200 Hz along the longitudinal beam of the rail on different positions, this paper analyses the impact of vertical stiffness and lateral stiffness of different fasteners within half of fastener spacing on different positions along the rail at the pinned-pinned frequency on the wheel-rail dynamic flexibility difference.
Caption: Figure 8: Dynamic flexibility of different positions on the longitudinal beam of rail at pinned-pinned frequency.
Caption: Figure 12: Dynamic flexibility of wheel and track on different positions along the rail at the pinned-pinned frequency.
Research on the Matching of Fastener Stiffness Based on Wheel-Rail Contact Mechanism for Prevention of Rail Corrugation