evanescent
发表于 2025-3-23 11:26:08
Tuned Mass Damper for Rail Noise Controlg the shear direction of resilient layers forming a multiple mass-—spring system. It provides effective broadband damping for a frequency range between 300Hz and 2500Hz. The resilient layers are aligned perpendicularly to the rail alignment such that each mass is allowed to oscillate in both vertica
avarice
发表于 2025-3-23 16:02:29
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interrupt
发表于 2025-3-23 19:36:45
Bridging the Gap from Multibody Simulations to Acoustic Analysisl the state-of-the-art method in order to study and optimize the running dynamics and comfort of railway vehicles in details. However, acoustic issues could not be ad ressed so far by multibody analysis. This is due to the fact that the validity of the used multibody models is restricted to the very
encomiast
发表于 2025-3-24 00:54:47
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错
发表于 2025-3-24 05:13:02
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FLAX
发表于 2025-3-24 07:18:11
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尖酸一点
发表于 2025-3-24 14:22:29
Modeling the Directivity of Wheel/Rail Radiation Using a Circular/Straight Line of Perpendicular Diptic in the horizontal direction, whilst it is only about 4 dB more directional than a monopole source in a vertical plane perpendicular to the rail; (2) the directivity of wheel radiation is close to the vertical directivity of rail radiation..The work presented in this paper intends to interpret th
思想灵活
发表于 2025-3-24 17:40:20
High-Speed Rail: Excitation Frequencies and Track Stiffnesse of the characteristic frequencies present are investigated. These include speed-dependent parametric excitation frequencies related to the geometry of the system, for instance the rate with which bogies and axles pass above a given position in the track, or with which a wheel passes over the faste
狂怒
发表于 2025-3-24 22:46:11
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Magnificent
发表于 2025-3-25 02:03:37
s, each written by the world renowned experts.Still valid an.Salen Metal Complexes as Catalysts for the Synthesis of Polycarbonates from Cyclic Ethers and Carbon Dioxide, by Donald J. Darensbourg.- Material Properties of Poly(Propylene Carbonates), by Gerrit. A. Luinstra and Endres Borchardt.- Poly