𝔖 Bobbio Scriptorium
✦   LIBER   ✦

A CALCULATION MODEL FOR THE NOISE FROM STEEL RAILWAY BRIDGES

✍ Scribed by M.H.A. Janssens; D.J. Thompson

Publisher
Elsevier Science
Year
1996
Tongue
English
Weight
407 KB
Volume
193
Category
Article
ISSN
0022-460X

No coin nor oath required. For personal study only.

✦ Synopsis

The sound level of a train crossing a steel railway bridge is usually about 10 dB higher than on plain track. In the Netherlands there are many such bridges which, for practical reasons, cannot be replaced by more intrinsically quiet concrete bridges. A computational model is described for the estimation of noise levels due to a train crossing a steel bridge. Despite the complexity and diversity of bridge structures, a highly simplified model of the bridge structure is used. An estimate of the noise emitted by wheel and rail is also incorporated. Comparisons with measurements on a number of typical bridges shows very good agreement. It is found that the increase in noise at a bridge is caused not only by the noise emission from the bridge structure itself, but also by increased noise radiation by the rail and a modified sound transmission from bridge to receiver. It is possible, in close collaboration with designers, to use the model in optimizing bridge structures. The model is also intended to complement the Dutch statutory prediction schemes for railway noise.

πŸ“œ SIMILAR VOLUMES

NOISE FROM STEEL RAILWAY BRIDGES: A SYST
NOISE FROM STEEL RAILWAY BRIDGES: A SYSTEMATIC INVESTIGATION ON METHODS FOR SOUND REDUCTION
✍ T. Odebrant πŸ“‚ Article πŸ“… 1996 πŸ› Elsevier Science 🌐 English βš– 229 KB

Two different methods to reduce the air-borne sound and two methods to reduce the structure-borne sound from a steel bridge were investigated: the high screening girder was provided with a sound absorber on the side facing the trains; all openings between and around the sleepers were filled with a c

A New Model for Calculating the Lumbar L
A New Model for Calculating the Lumbar Lordosis Angle in Early Hominids and in the Spine of the Neanderthal From Kebara
✍ Ella Been; Alon Barash; Assaf Marom; Itzhak Aizenberg; Patricia A. Kramer πŸ“‚ Article πŸ“… 2010 πŸ› Wiley (John Wiley & Sons) 🌐 English βš– 186 KB πŸ‘ 1 views

## Abstract The debate over the posture of early hominids is longstanding, perhaps because the absence of a reliable method for reconstructing the lumbar lordosis angle (LA) in early hominid spines has made it difficult to determine whether their posture resembled or differed from that of modern hu

Evaluating wind fields from a diagnostic
Evaluating wind fields from a diagnostic model over complex terrain in the Phoenix region and implications to dispersion calculations for regional emergency response
✍ Weiguo Wang; William J. Shaw πŸ“‚ Article πŸ“… 2009 πŸ› John Wiley and Sons 🌐 English βš– 404 KB

## Abstract This paper compares the wind field from a diagnostic model (CALMET) over complex terrain in the Phoenix region in the USA with observations that are gridded by a state‐of‐the‐art Four‐Dimensional Data Assimilation (FDDA) system. The wind difference between the CALMET and FDDA wind field