Vertical vibration modelling and vibration response analysis of Chinese high-speed train passengers at different locations of a high-speed train

Abstract

To study the vibration of a passenger's head and internal organs at different locations of a high-speed train, a 9-degrees-of-freedom (DOF) model of seated passengers is proposed in this paper, and its parameters of the damping coefficients and stiffnesses are identified. Next, the response of the head and internal organs is simulated by applying the vibrational stimulation generated by a 27-DOF vehicle model under track irregularity. Moreover, by applying the measured vibration signal, the following conclusions can be drawn: (1) the weakest response is detected at the centre of the compartment of the wagon, and a stronger response is detected at the centre of the bogie, with the rolling motion having a greater effect 1 m away from the centre of the bogie; (2) the response of the human internal organs is stronger than that of the head under stimulation with a lower frequency of less than 3 Hz, and a similar conclusion can be drawn in the range of 5 to 8 Hz. However, if the frequency is in the range between 8 and 15 Hz, the situation is entirely different. The responses of both the head and internal organs are reduced at frequencies over 20 Hz; (3) from the real application, it can be inferred that the greatest response can be detected at approximately 3 Hz for internal organs and at 8 Hz or higher for the head.

Preliminary analysis of vibration characteristics of human body on high-speed train

“…17 Chen et al developed a nine-degree-of-freedom (DOF) human model for predicting the vibration of passengers’ heads and internal organs at different locations in a high-speed train. 18 To capture the human biodynamic response, Wu et al developed a multi-body dynamic model that considers the lateral, vertical, and roll motions of a seated human body and also considered a double-unit train-seat model. Then, the vibrational responses of passengers under different train speeds, car-body damping conditions, suspension parameters, etc.…”

An isogeometric analysis based design of highly sensitive and precise omnidirectional piezoelectric-fiber accelerometer

“…The low frequency vibrations usually exist in vehicles and trains moving in various speeds (Ainalis et al, 2018;Chen et al, 2020;Huang and Ferguson, 2018;Park et al, 2020;Taskin et al, 2017), and the corresponding frequency band of the vehicle body is from 1.0 Hz to 5.0 Hz (Ainalis et al, 2018;Chen et al, 2020), which is also close to resonant frequency band of human body (Huang and Ferguson, 2018;Park et al, 2020;Taskin et al, 2017). In addition, the seismic detection for road and railway is focusing on the frequency band of [0.001 Hz, 4 Hz] (Matichard and Evans, 2015;Quan et al, 2018;Venkateswara et al, 2017).…”