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<p>NVH (Noise, vibration, and harshness) performance has been identified as having a significant influence in the purchase considerations of most automobile purchasers. Periodic cellular material structures (PCMS) are recently introduced multi-functional structures, commonly in sandwich form, that facilitate a wide variety of engineering purposes. Although literature concerning many PCMS properties is abundant, information about their vibration and acoustic responses is scanty, to the best knowledge of the present authors. This article documents a basic investigation of the vibration and acoustic behaviors of some PCMS through practical, analytical and numerical approaches, in order to evaluate the possibilities for minimizing, the transmission of noise and vibration. Some of these materials were made and investigated over frequency ranges which include several commonly-encountered vibration and acoustic frequencies of automotive and some other structures. Observations from this work are therefore expected to contribute towards design inputs to obtain better performances. A novel investigation of the effects upon vibration response of even slight inaccuracies of cutting out samples from larger blanks of such materials has also been made.</p

Vibro-Acoustic Characterization and Optimization of Periodic Cellular Material Structures (PCMS) for NVH Applications