Search Results

Thermal Acoustic Protective Shields (TAPS) serves dual purpose. They provide a thermal barrier, which protects sensitive components from the exhaust manifold radiated energy. They also act as an acoustic insulator, which reduces the amount of sound power transmitted from the engine to the environment. The design of multi layered TAPS has, until recently, relied on trial and error or simplified numerical analyses. The following work describes efforts to develop a comprehensive numerical methodology for the initial forming of the components, which accounts for most of the physics of the problem. The simulation accounts for the complete forming operations of the part, i.e. edge folding, multi layer assembly, edge crimping, beading, and final forming. Non-linear effects are accounted for such as interlayer frictional dissipation, plastic anisotropy and self-contact.

Today, Computer Aided Engineering (CAE) is a feature that becomes more and more essential in the development of Thermal-Acoustical Protective Shields (TAPS). The development cycle of TAPS needs to be reduced while simultaneously reducing costs. The performance, functionality and visual appearance need to be improved as well. This paper will describe our general CAE approach, which is based on the use of different CAD systems and Finite Element Analysis (FEA). We will describe how we use the results of our approach in the development of new TAPS. Because this approach is based on the knowledge of the parameters that exist and how they influence a TAPS function, we will first discuss the most important of these parameters. Here we split our discussion into ‘What is a TAPS, ‘What are the main steps of making a TAPS - Designing, prototype’, and ‘How a TAPS works in an engine’. We will then explain the different FEA utilization's.