Noise reduction for compressors by modes control using topology optimization of eigenvalue

Structural vibration is the most significant source of structure-borne noise. Avoiding severe resonances of the structures in order to reduce noise generation is the main interest of engineering fields.This paper studied a typical example of the structure-borne noise reduction utilized in general engineering practices. Noise measurement and experimental modal analysis demonstrated that some resonance modes of the structure contribute highly to noise generation.The reasons for the noise generation of the resonance modes were visualized through a finite element analysis. Mode control was employed to reduce the noise from the structure.Topology optimization, in this research, was used to find the most effective structural configuration as present empirical designs fail to constrain various resonance modes. Design modifications based on the optimization result reduced the noise of the targeted mode without any significant design change in the structure. This example showed that the noise of the structure can be reduced by mode control using topology optimization.