Analysis of Powertrain Acoustic Properties.

      Аннотация: The issue of computational modelling of noise and vibration of powertrain is the next logical step in the virtualization of the design process. Engine manufactures and also all producers not only in the automotive industry are trying to change the process of development in to the virtual design as much as possible. This is due to reducing design costs and shortening the time needed to put the product to customers. Technical requirements for powertrains are now many times contradictory. It is expected: high performance, reliability, low power consumption, basic construction and low production costs as well as reduced emissions. However, we can say that even if these properties are essential, ultimately the decision to buy a car is often overridden by the user comfort.

Ключевые слова: noise, Vibration, Mobility, Sound, Damping, Experimental Modal Analysis, virtual engine, normal velocity of surface, elektrodynamic excites, frequency response function