The invention relates to the technical field of
structural vibration dynamics experiments, in particular to an LDV self-following
modal experiment device of a rotating structure and an experiment method.The experiment device comprises a
static structure, the rotating structure and a driving structure, and the
static structure comprises a
laser vibration meter and a
slip ring stator; the rotating structure comprises a
slip ring rotor, a
light transmission shaft, a shaft
system, a second reflective mirror, a piezoelectric
ceramic piece and a
test object, and the
light transmission shaft is further provided with a third reflective mirror; the piezoelectric
ceramic piece is mounted on a
test object; one or more groups of piezoelectric
ceramic pieces are used for applying excitation to a
test object, and the rest groups of piezoelectric ceramic pieces and the
laser vibration meter are used for collecting vibration signals of the test object; the first reflector, the second reflector and the third reflector are used for controlling
laser emitted by the laser vibration meter together so that the laser can be focused on a test object, and circumferential adjustment of the focusing position of the laser on the test object can be achieved through the
optical axis and the shaft
system. According to the LDV self-following
modal experimental device and experimental method of the rotating structure, the problem that
modal experiments are difficult to carry out on an existing rotating mechanical structure under the rotating working condition is solved.