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Today's power train applications have increased dynamics, loads and temperatures while requirements for NVH increase and power train packaging offers less space for shielding components to protect surrounding parts. Short development timing requires the use of FE analysis forecasting durability, natural frequencies, stress levels and structural parameter. While these parameters nowadays can be dealt successfully with available simulation tools, it is still complex to understand acoustical effects occurring at dynamically excited heat shield applications which moreover depend on each other. The design (form and material) and assembly of the majority of the multi-layered heat shield components affect their acoustical behavior. Due to the fact that application temperatures range between 150°C at underbody parts and nearly 1000°C at hot ends, suitable materials have to be chosen. This publication describes which acoustical effects can occur on heat shields.

Today's power train applications have increased dynamics and temperatures while power train packaging offers less space for shielding components to protect surrounding parts. Short development timing requires the use off FE analysis to determine stiffness & durability based on CAD models in the early design phases. While these tools are already very common in metal sheet forming components, it is still unusual to simulate this on conventional heat shield designs made from steel and composite layer combinations - so called Sandwich material. Even CAE-software providers do not have much experience in modeling this composite material. The construction and assembly of the different layers in a heat shield component form is an important aspect to the simulation. This in return also makes it very difficult for modeling.