TY - GEN
T1 - In-situ source characterization for nvh analysis of the engine-transmission unit
AU - El Mahmoudi, Ahmed
AU - Trainotti, Francesco
AU - Park, Keychun
AU - Rixen, Daniel J.
N1 - Publisher Copyright:
© The Society for Experimental Mechanics, Inc. 2021
PY - 2021
Y1 - 2021
N2 - Over the past decades, engineers have developed methods to determine critical paths for sound transmission, also known as Transfer Path Analysis (TPA). This demand stems, for instance, from the need to prevent undesired vibrations in modern vehicles. A relatively new method that allows for the characterization of a source in the assembled state is called in-situ TPA (iTPA). Generally, the excitation forces cannot be measured. Although the iTPA makes the development process more complex, it provides insight into the forces generated by active components that are transferred to the receiver structure. The vehicle dynamics as well as its vibration behavior is essentially determined by the behavior of the powertrain. For this more complex system, several challenges affect the method’s applicability, such as the accessibility to the engine mount interfaces and the modeling of coupling degrees of freedom. The aim of this paper is the characterization of the excitation source based on the engine-transmission unit using the iTPA method. It is analyzed and evaluated in terms of its accuracy and applicability. Equivalent forces of two different vehicle configurations, stiff and soft engine rubber mounts, are compared and used to predict the total vehicle vibration responses.
AB - Over the past decades, engineers have developed methods to determine critical paths for sound transmission, also known as Transfer Path Analysis (TPA). This demand stems, for instance, from the need to prevent undesired vibrations in modern vehicles. A relatively new method that allows for the characterization of a source in the assembled state is called in-situ TPA (iTPA). Generally, the excitation forces cannot be measured. Although the iTPA makes the development process more complex, it provides insight into the forces generated by active components that are transferred to the receiver structure. The vehicle dynamics as well as its vibration behavior is essentially determined by the behavior of the powertrain. For this more complex system, several challenges affect the method’s applicability, such as the accessibility to the engine mount interfaces and the modeling of coupling degrees of freedom. The aim of this paper is the characterization of the excitation source based on the engine-transmission unit using the iTPA method. It is analyzed and evaluated in terms of its accuracy and applicability. Equivalent forces of two different vehicle configurations, stiff and soft engine rubber mounts, are compared and used to predict the total vehicle vibration responses.
KW - In-situ Transfer Path Analysis
KW - Powertrain NVH
KW - Source characterization
UR - http://www.scopus.com/inward/record.url?scp=85091582826&partnerID=8YFLogxK
U2 - 10.1007/978-3-030-47630-4_7
DO - 10.1007/978-3-030-47630-4_7
M3 - Conference contribution
AN - SCOPUS:85091582826
SN - 9783030476298
T3 - Conference Proceedings of the Society for Experimental Mechanics Series
SP - 79
EP - 91
BT - Dynamic Substructures, Volume 4 - Proceedings of the 38th IMAC, A Conference and Exposition on Structural Dynamics, 2020
A2 - Linderholt, Andreas
A2 - Allen, Matt
A2 - D’Ambrogio, Walter
PB - Springer
T2 - 38th IMAC, A Conference and Exposition on Structural Dynamics, 2020
Y2 - 10 February 2020 through 13 February 2020
ER -