Acoustic Simulation of Duct, Intake & Exhaust Systems for Improved Sound Performance скачать в хорошем качестве

Acoustic Simulation of Duct, Intake & Exhaust Systems for Improved Sound Performance

Noise from the intake and exhaust lines contributes signifi¬cantly to the total noise level of passenger cars, motorcycles or utility vehicles. Duct noise can also be an important source of annoyance of products ranging from vacuum cleaners to HVAC systems in buildings. To accurately assess the acoustic performance of duct systems, both the air-borne noise propagating through the duct (known as pipe noise) and the structure-borne noise generated by the pipe vibration (shell noise) should be evaluated. To study in-duct acoustic propagation, numerical simulation using 3D finite element methods (FEM) offers attractive solution and circumvents several limitations of 1D approach. Both component-level and system-level studies can be conducted, for improving sound transmission loss in a single component or for predicting total noise level emitted by an entire exhaust line. Optimization task can also be performed efficiently by combining FEM with Transfer Matrix Method (TMM). This webinar will provide an overview of Actran capabilities in modeling duct acoustics. Several application examples will be presented. The webinar will also include a small live demo.