To provide a vibration testing machine capable of oscillating objects to be tested at a high frequency by the drive of linearly extending and contracting fluid actuators.
The vibration testing machine is provided with: a table 2 for mounting an object to be tested; a first fluid actuator 3 for generating vibrations in a vertical direction; a second fluid actuator 4 for generating vibrations in a horizontal direction; a first linking part constituted of horizontal shafts 6a and 6b between the table 2 and the first fluid actuator 3 and bearings 5a and 5b fitted in the horizontal shafts 6a and 6b; a second linking part constituted of a vertical shaft 10 between the table 2 and the second fluid actuator 4 and a bearing 11 fitted in the vertical shaft 10; a first hydrostatic bearing for holding two surfaces of the horizontal shafts 6a and 6b of the first linking part and the bearings 5a and 5b fitted in them in a noncontact state; and a second hydrostatic bearing for holding two surfaces of the vertical shaft 10 of the second linking part and the bearing 11 fitted in it in a noncontact state.
Sakamoto, Akira
Kawasumi, Tetsuo
Morimoto, Yoshinori
