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Due to increased concerns of the Customers towards Product’s Noise levels and harsh competition, low noise levels have become an essential attribute for everything from Automobiles to Home Appliances. In Home Appliance industry, consumers demand quiet and smoother running products with quality. Domestic Home Refrigerators are one of the major products in such industries. Noise generation in a Refrigerator is from multiple sources such as Compressor, Fan and Refrigerant Tube etc. Vibrations from compressor are transferred to whole refrigerator body through baseplate which results in structure borne noise. This makes baseplate as critical component from Noise, vibration and Harshness (NVH) perspective. In current research work, Finite Element Model (FEM) of Refrigerator baseplate was created in Hyperworks. Normal Modes Analysis and Frequency Response Function (FRF) Analysis were performed using MSC-Nastran, a commercial software code. Experimental Modal Testing was performed on actual Refrigerator baseplate for free-free boundary condition. Outcome of experimental testing i.e. the Natural Frequencies, corresponding Mode Shapes and Modal Damping are used to validate simulation Model. FE Model was further updated based on the Sensitivity study of material properties, Thickness variation and appropriate modeling practices which results in very good agreement between simulation and experimental results. Noise Transfer Functions (NTF) appears to be very effective Tool to assess the Structure Borne Noise radiated from product in early stages of Design. Vibro-acoustic modeling was done in ESI Vibro-Acoustic One (VA One) simulation tool to predict Noise Transfer Functions (NTF) of refrigerator baseplate in actual mounted condition. Structure Borne Noise of refrigerator baseplate is reduced through series of optimization techniques.
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