cloture
发表于 2025-3-28 18:34:03
http://reply.papertrans.cn/67/6668/666785/666785_41.png
Introduction
发表于 2025-3-28 20:29:54
Estimating the Performance of Rail Dampers Using Laboratory Methods and Software Predictions, has been considered for track constructions typical in the UK and a regional train travelling at 120 km/h. For track fitted with ‘soft’ 120 MN/m rail pads, the dampers are predicted to reduce the total level by 2.5 dB(A) while with the ‘stiff’ 800 MN/m pads a 0.7 dB(A) reduction is expected.
neutrophils
发表于 2025-3-29 00:26:20
Experimental and Theoretical Studies on Impact Noise Generation due to Rail Joints,t noise at one rail joint is estimated quantitatively. The results show that the sleeper has the greater contribution below 630 Hz, whilst the wheel is predominant above 2000 Hz. By using the prediction model, the overall trends in noise are well predicted. Also, the model gives an estimate of the c
Free-Radical
发表于 2025-3-29 05:24:35
On the Importance of Accuracy of Geographic Model Data for Noise Impact Studies,ammetric measurements with its inherent measurement and processing (in)accuracy..To investigate the sensitivity of the calculations to small data collection inaccuracies, we have done an extensive parameter study. We performed parameter variations in the national-scale model and analyzed the resulti
Carcinogen
发表于 2025-3-29 09:47:53
Study on the Sound Radiation Directivity of a Railway Wheel and the Relationship between Directivitve bands and modes are recorded at a total of 667 measuring points. A radial mode (r, 2) and an axial mode (1, 2) are taken as examples to derive empirical equations of directivity pattern. A model developed by the boundary element (BE) method is found to simulate the directivity pattern more precis
抛媚眼
发表于 2025-3-29 12:13:21
http://reply.papertrans.cn/67/6668/666785/666785_46.png
Gastric
发表于 2025-3-29 16:48:10
Localizing Noise Sources on a Rail Vehicle during Pass-By, part of the train for frequencies around 600 Hz - 800 Hz with a radiated sound power that was approximately 5 dB above the noise radiated by the noisiest bogies. The cause of this noise is yet unknown, but a potential explanation could be an aerodynamic phenomenon at the front.
审问,审讯
发表于 2025-3-29 19:55:32
http://reply.papertrans.cn/67/6668/666785/666785_48.png
preservative
发表于 2025-3-30 01:04:41
http://reply.papertrans.cn/67/6668/666785/666785_49.png
Exterior
发表于 2025-3-30 07:07:12
this part of the study programme for many years. Not only has he acquired vast experience in teaching airplane design at university level, but he has also been deeply involved in design-oriented re search, e.g. developing rational design methods and systematizing design information. I am very pleased that th978-90-481-8273-2978-94-017-3202-4