Abstract
The paper deals with a selection of free-field vibration measurement results. The study is based on the vibration measurements. Vibration acceleration records and their dependence on the position of the accelerometer are shown. The study presents the results obtained in time domain and frequency domain (FFT). Nevertheless, the main aim of the paper is to compare the results of analysis which use the time – frequency domain. A Short-Term Fourier Transform (STFT) and Continuous Wavelet Transform (CWT) are used. The use of new methods to assess the dynamic characteristics is to validate the usefulness of proposed technique for non-stationary signals.
Highlights
Trains passages generate ground vibration, and the review of the worldwide literature (e.g. [1,2,3,4,5]) indicates that these vibrations are increasing engineering challenge and become a global concern
The paper presents a selection of free-field vibration measurement results in the selected point (in three directions, defined as P-04x for horizontal, P-05y and P-06z vertical downward)
Fast Fourier Transform (FFT) plays an important role in vibration analysis
Summary
Trains passages generate ground vibration, and the review of the worldwide literature (e.g. [1,2,3,4,5]) indicates that these vibrations are increasing engineering challenge and become a global concern. Transport plays an important role in shaping the quality of the environment. For this reason, large scale national testing of railway vibration took place in Poland at the railway line No 4. Selected for testing train Pendolino was running at predetermined speeds. Pendolino and InterCity (the train with the locomotive ES64U4 Husarz) excited free-field vibrations. The paper presents a selection of free-field vibration measurement results in the selected point (in three directions, defined as P-04x for horizontal (perpendicular to the track), P-05y (parallel to the track) and P-06z vertical downward). Results of free-field vibrations caused by two types of trains running at the speed of 160 km/h were analysed to make comparison that is more tangible
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