Experimental validation of the direct transmissibility approach to classical transfer path analysis on a mechanical setup

Guasch, Oriol; García, Carlos; Jové, Jordi; Artís, Pere

doi:10.1016/j.ymssp.2013.01.006

Cited by 47 publications

(20 citation statements)

References 29 publications

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“…Likewise, depending on accessibility of the structure, global transfer direct transfer (GTDT) (Guasch et al, 2013) and in situ blocked force (Elliott et al, 2013) methods are not applicable for the case studied. Likewise, depending on accessibility of the structure, global transfer direct transfer (GTDT) (Guasch et al, 2013) and in situ blocked force (Elliott et al, 2013) methods are not applicable for the case studied.…”

Section: General Considerationsmentioning

confidence: 99%

Assessment of vehicle noise variability through structural transfer path analysis

Oktav

Anlaş

Yılmaz

2016

IJVD

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In this work, vehicle noise variability and dominant paths that cause low frequency booms are investigated. Five identically produced vehicles are subjected to road tests to acquire engine and exhaust mounts' acceleration and cabin sound pressure level (SPL) data. When the acquired data are processed, significant variability is observed among SPLs of vehicles. Low frequency booms are also diagnosed and two of the tested vehicles are selected to be further analysed. Structural transfer path analysis (TPA) is carried out, in which several parameters such as test conditions and frequency response function estimation procedures are highlighted. Dominant paths that contribute to booms are identified. To diagnose the cause of variability, a systematic approach is proposed, where all steps consist of experimental studies only. Finally, it is deduced that predominant paths, which are found to be main contributors of diagnosed booms, are also the root causes of variability observed.

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Section: General Considerationsmentioning

confidence: 99%

Assessment of vehicle noise variability through structural transfer path analysis

Oktav

Anlaş

Yılmaz

2016

IJVD

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“…Second, for estimating the coupled FRFs, it is required to remove active parts, which is not often feasible [4,5]. e third one is that it cannot measure the exact FRFs under real operational conditions owing to time-varying systems in different circumstances [6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Time‐Domain Substructure Transient Vibration Transfer Path Analysis Based on Time‐Varying Frequency Response Functions under Operational Excitations

Zhou

2019

Shock and Vibration

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The time-domain substructure inverse matrix method has become a popular method to detect and diagnose problems regarding vehicle noise, vibration, and harshness, especially for those impulse excitations caused by roads. However, owning to its reliance on frequency response functions (FRFs), the approach is effective only for time-invariable linear or weak nonlinear systems. This limitation prevents this method from being applied to a typical vehicle suspension substructure, which shows different nonlinear characteristics under different wheel transient loads. In this study, operational excitation was considered as a key factor and applied to calculate dynamic time-varying FRFs to perform accurate time-domain transient vibration transfer path analysis (TPA). The core idea of this novel method is to divide whole coupled substructural relationships into two parts: one involved time-invariable components; normal FRFs could be obtained through tests directly. The other involved numerical computations of the time-domain operational loads matrix and FRFs matrix in static conditions. This method focused on determining dynamic FRFs affected by operational loads, especially the severe transient ones; these loads are difficult to be considered in other classical TPA approaches, such as operational path analysis with exogenous inputs (OPAX) and operational transfer path analysis (OTPA). Experimental results showed that this new approach could overcome the limitations of the traditional time-domain substructure TPA in terms of its strict requirements within time-invariable systems. This is because in the new method, time-varying FRFs were calculated and used, which could make the FRFs at the system level directly adapt to time-varying systems from time to time. In summary, the modified method extends TPA objects studied in time-invariable systems to time-varying systems and, thus, makes a methodology and application innovation compared to traditional the time-domain substructure TPA.

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“…In this framework, hybrid vehicles (HV) and electric vehicles (EV) are two of the technological approaches adopted. These types of vehicle present the advantage that they pollute the environment less than other conventional technology-based vehicles (El-Refaie, 2011;Fukuo et al, 2001;Judd & Overbye, 2008;Taymaz & Benli, 2014), nevertheless one issue of concern has been the noise impact that they incur (Ahlersmeyer, 2009;De Klerk & Ossipov, 2010;Elliott et al, 2013;Gajdatsy et al, 2009;Guasch et al, 2013;Lennström et al, 2014;Plunt, 2005). In this regard, whilst the radiated noise in the exterior of these vehicles is almost non-existent in low-speed regime, the interior noise does not fulfil high standards in terms of comfort.…”

Section: Introductionmentioning

confidence: 99%

Comparison between transfer path analysis methods on an electric vehicle

et al. 2017

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A comparison between transfer path analysis and operational path analysis methods using an electric vehicle is presented in this study. Structure-borne noise paths to the cabin from different engine and suspension points have been considered. To realise these methods, two types of test have been performed; operational tests on a rolling road and hammer tests in static conditions. The main aim of this work is assessing the critical paths which are transmitting the structure-borne vibrations from the electric vehicle's vibration sources to the driver's ear. This assessment includes the analysis of the noise contribution of each path depending on the frequency and vehicle speed range and moreover, the assessment of the path noise impact for harmonic orders which arise due to the physical components of the electric vehicle. Furthermore, the applicability of these methods to electric vehicles is assessed as these techniques have been extensively used for vehicles powered with internal combustion engines

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Experimental validation of the direct transmissibility approach to classical transfer path analysis on a mechanical setup

Cited by 47 publications

References 29 publications

Assessment of vehicle noise variability through structural transfer path analysis

Assessment of vehicle noise variability through structural transfer path analysis

Time‐Domain Substructure Transient Vibration Transfer Path Analysis Based on Time‐Varying Frequency Response Functions under Operational Excitations

Comparison between transfer path analysis methods on an electric vehicle

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