TY - CHAP A1 - Jauregui-Correa, J. C. A1 - Otremba, Frank A1 - Romero-Navarrete, José A. A1 - Hurtado-Hurtado, G. ED - Pucheta, M. ED - Cardona, A. ED - Preidikman, S. ED - Hecker, R. T1 - Determination of the Effect of Sloshing on the Railcar-Track Dynamic Behavior T2 - Multibody Mechatronic Systems N2 - This paper presents the study of the impact caused by a liquid Cargo on a railway infrastructure. The dynamic behavior of a tank car corresponds to a multibody dynamic system with several degrees of freedom. This study’s data were obtained from a scale experimental fixture consisting of a track and a railcar with a tank. The track was instrumented with strain gauges and the railcar with accelerometers. The data showed non-periodic and periodic terms; therefore, the results were analyzed with the Empirical Mode Decomposition method (EMD). It was found that the EMD identified the signal components that were related to the sloshing. These components represent the mode shapes of the original signal. The location of the sloshing in the track was found applying spectrograms to the accelerometer data. This paper’s experimental outputs suggest that the sloshing effect is detectable at the track and in the vehicle dynamics. KW - Sloshing effect KW - Empirical Mode Decomposition KW - Wheel/track interaction KW - Multibody dynamics PY - 2021 SN - 978-3-030-88750-6 DO - https://doi.org/10.1007/978-3-030-88751-3_14 SP - 131 EP - 140 PB - Springer Nature Switzerland AG AN - OPUS4-53561 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CHAP A1 - Otremba, Frank A1 - Hildebrand, R. A1 - Romero Navarrete, J. A. A1 - Sklorz, Christian ED - Otremba, Frank T1 - A simplified analytical approach on the dynamic pressures in cylindrical vertical tanks T2 - Transactions on Engineering Technologies N2 - A simplified methodology is proposed to estimate the dynamic pressures developed within partially filled cylindrical vertical tanks when subjected to earthquake-related horizontal accelerations. The total pressure at the bottom of the tank is calculated as the superposition of vertical and horizontal pressures. While the magnitude of the vertical pressure depends on the free surface height of the liquid, the horizontal pressure depends on the magnitude of the horizontal acceleration and on the diameter of the tank. The liquid free surface oscillation angle is simulated based upon the principles of the simple pendulum analogy for sloshing. The length of the pendulum, however, is set on the basis of a methodology to calculate the free sloshing frequency of partially filled containers. Such a methodology is experimentally verified in this work. The outputs of the model for full scale situations, suggest that the lateral perturbation - sloshing phenomenon (earthquake effect) can generate an increase in the total pressure of 56% above the no lateral perturbation situation, further suggesting that such an overpressure should be taken into account when designing tanks that could be potentially subjected to earthquake-related perturbations. KW - Vertical cylindrical tanks KW - Pendulum analogy KW - Experimental approach KW - Sloshing, transition matrix approach KW - Hazmat PY - 2021 SN - 978-981-15-8273-8 SP - 1 EP - 15 PB - Springer AN - OPUS4-51982 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -