Using Simulation Software to Predict Automotive NVH One of the most pressing challenges for today’s automotive manufacturers is to make lighter cars. A lighter car will maintain a lower level of gas consumption and thus is more eco-friendly. To achieve this goal, many companies switched from aluminum to composite materials and put smaller engines …
The aerodynamic sources acting on a car side window, generally defined as the small wavelength sources such as turbulent eddies and boundary layer structures, are generally much larger in amplitude than the acoustic sources, those with longer wavelengths. So naturally you would expect that the aerodynamic sources have a much greater contribution on vehicle interior …
When designing an audio device, the most important thing for an engineer to consider is the quality of the sound. Quality is what makes the device valuable and differentiates it from competitors. Audio device manufacturing companies experience extremely high product development costs due to repetitive and expensive physical testing. In addition to the need …
Noise is a big problem in commercial and agricultural vehicles all around the world. While it is important for drivers to hear the sound of an engine, noise that is too loud can be uncomfortable. Government regulations on commercial and agricultural vehicles are heavy and also change from one country to another. For example, while …
All physical processes are to some degree nonlinear – every day, the materials that surround us all exhibit either large deformations or inelastic material behavior. For example, pressing an expanded balloon to create a dimple (the stiffness progressively increases, that is the rate of deflection decreases the more squeezing force is applied), or flexing a …
A universal problem when optimizing noise and vibration is that it often conflicts with durability or cost. Multi-body dynamics helps balance these competing requirements early in the design process by addressing key vibration issues facing engineers, such as “will excitations in one part of the systems interaction with another part of the system?” MBD makes …
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