Abstract
The aim of a transfer path analysis (TPA) is to view the transmission of vibrations in a mechanical system from the point of excitation over interface points to a reference point. For that matter, the Frequency Response Functions (FRF) of a system or the Transmissibility Matrix is determined and examined in conjunction with the interface forces at the transfer path. This paper will cover the application of an operational TPA for a wind turbine model. In doing so the path contribution of relevant transfer paths are made visible and can be optimized individually.
Highlights
For a successful transition from fossil fuels to less CO2 emissions, an increase in energy from renewable sources will be crucial
This equation can be written as quotient from the Auto Power Spectrum (APS) and Cross Power Spectrum (CPS) with each spectrum averaged by the numbers of considered operational points [2, 3]
The results can be plotted in a Partial Path Contribution Plot (PPCP)
Summary
For a successful transition from fossil fuels to less CO2 emissions, an increase in energy from renewable sources will be crucial. The FRF for a classical TPA are measured for the passive system with shaker or hammer excitation close to the coupling points and accelerometers at various position on the structure. This method of determining the frequency response of the system requires an extensive testing procedure. In comparison to a classical TPA, the OTPA estimates the transfer path in an assembled system using operation data It considers the transmissibility at the connector points for different speeds and can factor in the contribution of different source excitations of the drivetrain in one measurement. With the resulting transmissibility matrix, a complete map for the transmission of the vibrations to a receiver point can be visualized and the dominant transfer path can be identified
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