Simulated Computation of the Acoustic Energy Transfer through the Structure of Porous Media in Application of Passenger Carriage Body

摘要

The paper deals with the reconstruction of the rail-way passenger carriage floor for the improvement of the sound reduction index. Reconstruction was performed by using new acoustic material with a fibrous microstructure. The paper propose materials compared with simulated calculation of the acoustic energy transfer trough the porous microstructure of fibrous material, and further monitoring of their final effect in different fields of application in the floor and body structure of railway passenger carriage. Environmental aspects of construction, operation and maintenance of vehicles shall become an important significance on a global scale in recent years. Rail noise reduction is current topic nowadays. Especially technical solutions in the construction of railway vehicles, railway track construction and technological aspects of railway operations can effectively reduce the noise emitted by railway vehicles. The level of noise emissions from railway vehicles are systematically reduced by TSI standards. Vehicle design is largely influenced by the properties of materials and structures. Currently, the theory of multi-layer separating structures is used in the vehicle design.