A Piezoelectric Network Method for Improving the Sound Insulation Performance of Plate and Shell Structures

Abstract

The invention discloses a piezoelectric network method for improving the sound insulation performance of a plate shell structure. The first step is to uniformly distribute piezoelectric actuators on the plate structure; the second step is to design a circuit network to form a piezoelectric network plate; the third step is to Step 1: Calculate the optimal inductance value L, the sound insulation trough of the piezoelectric network board will not appear, and the sound insulation performance of the piezoelectric network board will be improved. The fourth step: check the sound insulation performance of the piezoelectric network board; the advantages of the present invention are: the position of the piezoelectric actuator in the piezoelectric network does not need to be optimized, and each piezoelectric actuator is connected by a circuit to work together, reducing the impact on The performance requirements of a single actuator are lower and have higher energy conversion efficiency. Through the circuit between the piezoelectric actuators, the electric energy flows between the piezoelectric actuators, providing a new circuit channel, which can change the energy distribution of the structure as a whole, thereby changing the sound insulation of the board and shell structure as a whole performance.

Description

technical field [0001] The invention belongs to the field of noise control, and in particular relates to a piezoelectric network method for improving the sound insulation performance of a plate shell structure. Background technique [0002] Plate and shell structures are widely used in aerospace, automotive and marine industries. The plate and shell structure is a lightweight structure, which can significantly reduce the total mass of the system. However, if the light structure is sensitive to vibration, it will increase the radiation noise of the system and reduce the sound insulation performance of the system. The increase in radiation noise will reduce the quality of ships and submarines. The stealth performance of cars, planes, etc. will reduce the survivability of the battlefield and increase the noise pollution of cars and planes to the surrounding environment; the reduction of sound insulation performance will weaken the comfort of cars and planes, so the sound radiat...

AI Technical Summary

Problems solved by technology

The plate and shell structure is a lightweight structure, which can significantly reduce the total mass of the system. However, if the light structure is sensitive to vibration, it will increase the radiation noise of the system and reduce the sound insulation performance of the system. The increase in radiation noise will reduce the quality of ships and submarines. The stealth performance of cars, planes, etc. will reduce the survivability of the battlefield and increase the noise pollution of cars and planes to the surrounding environment; the reduction of sound insulation performance will weaken the comfort of cars and planes, so the sound radiation and sound insulation problems of plate and shell structures has always attracted attention

The disadvantage of piezoelectric branch damping technology is that the requirements for piezoelectric materials and electrical components are too high. For example, a large inductance value is required for low-frequency vibration control, and the piezoelectric actuator bears a large load; the control effect obviously depends on The pasting position of the piezoelectric material, in order to achieve the best control effect, it is necessary to optimize the pasting position of the piezoelectric sheet; the multi-modal control effect is not easy to achieve, etc.

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