What is Transfer Path Analysis (TPA) and how is it applied in NVH?

TPA identifies contributions of various paths through which vibration energy travels from sources to receivers. It involves: Measuring transfer functions from input points to target locations, measuring operational forces or accelerations at source mounts, and calculating path contributions by multiplying input by transfer function. Results rank path contributions, guiding countermeasures to the most significant paths. Applications include powertrain mount optimization, suspension tuning, and identifying problematic body panel resonances. Advanced methods like operational TPA and component TPA provide additional insights.