METHOD FOR CONTROLLING STRUCTURAL ACOUSTIC TRANSMISSION ON BASIS OF COMBINED-TYPE VIBRATION ISOLATION DEVICE

摘要

A method for controlling structural acoustic transmission on the basis of a combined-type vibration isolation device comprises the following steps: S1: determining the required combined-type vibration isolation device according to parameters of an isolated mechanical apparatus; S2: vertically placing the isolated mechanical apparatus on the combined-type vibration isolation device; S3: adjusting the mass of a middle counterweight (4) of the combined-type vibration isolation device; S4: adjusting the natural frequency of the combined-type vibration isolation device so that the natural frequency of the combined-type vibration isolation device is lower than the structural vibration acoustic transmission frequency generated during operation of the isolated mechanical apparatus; and S5: fastening the isolated mechanical apparatus. A combined-type vibration isolation system controls the propagation of the noise of the high-frequency structure, the vibration isolation device is arranged between the isolated mechanical apparatus and a carrying foundation, performance parameters of upper and lower vibration isolators (2, 5), a damper (3), and the middle counterweight (4) are matched with one another, the middle counterweight (4) absorbs energy, and the spring and rubber isolators (2, 5) effectively perform isolation, so that energy transfer of the structural noise is reduced, and the structural acoustic transmission of the mechanical vibrating apparatus is efficiently isolated.