A study on the evaluation of ride comfort due to human dynamic characteristics on biaxial vibration

This paper presents a method for the evaluation of ride comfort by using the multiple regression analysis under biaxial vibration. In order to measure the transmissibility of the most sensitive parts of human, excitation experiments are performed. In the experiment, subjects were exposed to three kinds of biaxial sine wave vibrations with phase differences and a reproductive two dimensional floor vibration of a high-speed train. The frequency responses of the sensitive parts were measured and the subjects were required to compare the ride comfort of several vibrations and to answer questionnaires. A multiple regression analysis is carried out and it has been clarified that biaxial vibration increases the discomfort and the acceleration on the head is most dominant for the ride comfort. The most dominant frequencies are also clarified.