Dynamic Characteristics Study of U-Beam Applied in Rail Transit
The Train-Track-Bridge coupling vibration theory was applied to analyze the dynamic characteristics of a U-beam serviced in Chongqing Rail Transit Line 1 in China. According to the analysis, for the U-beam form of this opening cross-section, the traditional 3D beam element model can only reflect the first-order vibration mode, but neglect the coupled local flexure and torsion vibration characteristics; the 3D beam element model overestimates the lateral stiffness of the bridge, and underestimates it’s lateral vibration; the 3D plate element model is reasonable in dynamic analysis of opening cross-section structure; the vibration of U-beam dominates in the frequency range of f < 250, which is accurate and efficient to take into account this frequency range in the analysis of noise radiated by bridge structure.
Chaohe Chen, Yong Huang and Guangfan Li
X. Zhang et al., "Dynamic Characteristics Study of U-Beam Applied in Rail Transit", Advanced Materials Research, Vols. 243-249, pp. 2021-2026, 2011