Most of mechanical components, especially those belonging to aerospace sector, vehicles and, in particular, the automotive sector need an experimental qualification phase aimed to determine both their functionalities and their structural strength. Regarding the structural strength, the tests most commonly required by regulatory standards and typically performed belong to two categories, so similar as different: Sine-Sweep test and Random test. The present work is part of a consolidated research topic aimed to develop design techniques making them as much simpler and faster as possible in order to reduce product development times up to the virtual verification of test conditions. In particular, the present work is aimed to propose a frequency domain methodology for dynamic simulation and evaluation of the fatigue behavior for Sine-Sweep test, comparing it with the time domain technique that is considered as reference. The activity carried out in collaboration with a well-known automotive industry (HPE-COXA S.p.A.) verified these methodologies on a test case proposed by the company itself, i.e. the qualification of a set of supplying pipe of a high performance engine. The comparison between the time domain approach and the proposed approach in frequency domain certifies the extreme reliability of the latter as well as the advantages it offers to the designer in terms of computational times that results to be extremely reduced. The activity then created the prerequisites for the development of future research activities aimed to reduce calculation times as much as possible making such calculation tools of easily accessible to the industrial community.
Sine-Sweep qualification test for engine components: The choice of simulation technique
Claudio Braccesi;Filippo Cianetti;Leonardo Goracci;Massimiliano Palmieri
2020
Abstract
Most of mechanical components, especially those belonging to aerospace sector, vehicles and, in particular, the automotive sector need an experimental qualification phase aimed to determine both their functionalities and their structural strength. Regarding the structural strength, the tests most commonly required by regulatory standards and typically performed belong to two categories, so similar as different: Sine-Sweep test and Random test. The present work is part of a consolidated research topic aimed to develop design techniques making them as much simpler and faster as possible in order to reduce product development times up to the virtual verification of test conditions. In particular, the present work is aimed to propose a frequency domain methodology for dynamic simulation and evaluation of the fatigue behavior for Sine-Sweep test, comparing it with the time domain technique that is considered as reference. The activity carried out in collaboration with a well-known automotive industry (HPE-COXA S.p.A.) verified these methodologies on a test case proposed by the company itself, i.e. the qualification of a set of supplying pipe of a high performance engine. The comparison between the time domain approach and the proposed approach in frequency domain certifies the extreme reliability of the latter as well as the advantages it offers to the designer in terms of computational times that results to be extremely reduced. The activity then created the prerequisites for the development of future research activities aimed to reduce calculation times as much as possible making such calculation tools of easily accessible to the industrial community.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
