Rotational vibration test bench for fiber reinforced composite discs and drum thin-walled members with loose bolts

摘要

PROBLEM TO BE SOLVED: To provide a rotary vibration test bench for a fiber-reinforced composite disc / drum thin-walled member in a state where bolts are loosened. SOLUTION: This is a rotary vibration test bench for a fiber-reinforced composite disc / drum thin-walled member in a loosened state, and includes a disc / drum thin-walled member device, a dynamic bolt relaxation device, a linear start / stop device, and a circuit. A dynamic bolt loosening device, including a laser scanning device, is used to simulate bolt loosening, connecting a reflective mirror (16) to the motor and together with a fiber reinforced composite disc drum thin-walled member (3). By fixing it in the hollow shaft of the above at an inclination angle of 45 degrees and turning the motor on and off, differential rotation or synchronous rotation of the laser optical path and the disk drum body is realized, and the optical path is combined with the reflection mirror (16). (3) The frequency, amplitude, and phase of the vibration of the specific circumferential cross section or the specific measurement point inside the fiber-reinforced composite disc / drum thin-walled member are measured, and the vibration of the disc / drum member is measured through the above-mentioned vibration conditions. The relationship and regularity between changes in properties and looseness of bolts can be studied to provide more evidence for improvements in bolt connection structures, connection methods and placement designs. [Selection diagram] Fig. 1