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Publications (10 of 94) Show all publications
Manzari, L., Göransson, P., Cuenca, J. & Lopez Arteaga, I. (2018). A fully automated high-speed optical rig for in vacuo, full field, non-contact vibration measurements for viscoelastic, anisotropic materials. In: : . Paper presented at NOVEM 2018 Noise and vibration emerging methods, The 6th conference, Ibiza (Balearic Islands), Spain, May 7-9, 2018 (pp. 91-102). , Article ID 175109.
Open this publication in new window or tab >>A fully automated high-speed optical rig for in vacuo, full field, non-contact vibration measurements for viscoelastic, anisotropic materials
2018 (English)Conference paper, Published paper (Refereed)
Abstract [en]

In this paper, a setup for measuring the three-dimensional displacement field of a test object un-dergoing controlled dynamic excitation in a vacuum chamber is presented. The setup has beendesigned with porous materials in mind, yet is suitable for the measurement of anisotropic vis-coelastic solids in general. To achieve non-contact data acquisition, a stereo high-speed camerasystem measures the displacement of the foundation and of the test object. A laser Doppler vi-brometer is used before the actual measurement to choose an excitation level that maximizes thesignal-to-noise ratio while allowing to ensure that the test object is fully relaxed and stable at thebeginning of every measurement. The setup, comprising both commercial and in-house hardwareand software solutions, addresses the challenges of measuring in vacuum with non-contact tech-niques. All these aspects are discussed in the current paper, and preliminary results are presented.The ultimate objective is to estimate the dynamic properties of a material using inverse methodsand the data obtained.

Keywords
dic, non-contact, vibration, anisotropy, high-speed, digital image correlation, viscoelasticity
National Category
Mechanical Engineering
Research subject
Engineering Mechanics
Identifiers
urn:nbn:se:kth:diva-231576 (URN)
Conference
NOVEM 2018 Noise and vibration emerging methods, The 6th conference, Ibiza (Balearic Islands), Spain, May 7-9, 2018
Note

QC 20180702

Available from: 2018-06-29 Created: 2018-06-29 Last updated: 2018-10-19Bibliographically approved
Thompson, D., Squicciarini, G., Zhang, J., Lopez Arteaga, I., Zea, E., Dittrich, M., . . . Wändell, J. (2018). Assessment of measurement-based methods for separating wheel and track contributions to railway rolling noise. Applied Acoustics, 140, 48-62
Open this publication in new window or tab >>Assessment of measurement-based methods for separating wheel and track contributions to railway rolling noise
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2018 (English)In: Applied Acoustics, ISSN 0003-682x, Vol. 140, p. 48-62Article in journal (Refereed) Published
Abstract [en]

The noise produced during a train pass-by originates from several different sources such as propulsion noise, noise from auxiliary equipment, aerodynamic noise and rolling noise. The rolling noise is radiated by the wheels and the track and is excited by the wheel and rail unevenness, usually referred to as roughness. The current TSI Noise certification method, which must be satisfied by all new mainline trains in Europe, relies on the use of a reference track to quantify the noise from new vehicles. The reference track is defined by an upper limit of the rail roughness and a lower limit of the track decay rate (TDR). However, since neither the rail roughness nor the track radiation can be completely neglected, the result cannot be taken as representing only the vehicle noise and the measurement does not allow separate identification of the noise radiated by wheel and track. It is even likely that further reductions in the limit values for new rolling stock cannot be achieved on current tracks. There is therefore a need for a method to separate the noise into these two components reliably and cheaply. The purpose of the current study is to assess existing and new methods for rolling noise separation. Field tests have been carried out under controlled conditions, allowing the different methods to be compared. The TWINS model is used with measured vibration data to give reference estimates of the wheel and track noise components. Six different methods are then considered that can be used to estimate the track component. It is found that most of these methods can obtain the track component of noise with acceptable accuracy. However, apart from the TWINS model, the wheel noise component could only be estimated directly using three methods and un- fortunately these did not give satisfactory results in the current tests.

Place, publisher, year, edition, pages
Elsevier, 2018
Keywords
Railway noise, Rolling noise, Experimental methods, Source separation, Transfer path analysis, Beamforming
National Category
Fluid Mechanics and Acoustics Vehicle Engineering
Research subject
Vehicle and Maritime Engineering
Identifiers
urn:nbn:se:kth:diva-228062 (URN)10.1016/j.apacoust.2018.05.012 (DOI)000440121900006 ()2-s2.0-85047198783 (Scopus ID)
Projects
Roll2Rail
Funder
EU, Horizon 2020, 636032
Note

QC 20180525

Available from: 2018-05-17 Created: 2018-05-17 Last updated: 2018-08-20Bibliographically approved
Hosseini, N., Kornilov, V. N., Teerling, O. J., Lopez Arteaga, I. & de Goey, P. (2018). Evaluating thermoacoustic properties of heating appliances considering the burner and heat exchanger as acoustically active elements. Combustion and Flame, 191, 486-495
Open this publication in new window or tab >>Evaluating thermoacoustic properties of heating appliances considering the burner and heat exchanger as acoustically active elements
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2018 (English)In: Combustion and Flame, ISSN 0010-2180, E-ISSN 1556-2921, Vol. 191, p. 486-495Article in journal (Refereed) Published
Abstract [en]

Heat exchangers are an essential constituent part of many combustion systems. The thermoacoustic instability in such systems is a common problem and it has been studied extensively. However, the heat exchanger has not gained much attention in the field of combustion thermoacoustics, leading to a lack of knowledge about the thermoacoustic interactions between the burner and the heat exchanger. In this paper, a modeling approach is introduced to study these interactions in an academic representation of a heating appliance, comprised of a perforated slit burner and a tube heat exchanger. Both elements are considered thermally and acoustically active. A CFD model is used in a two-dimensional domain to simulate the response of the system to small amplitude broadband velocity perturbations. The thermochemical and acoustic coupling between the burner and the heat exchanger is investigated and a method is introduced to decouple their effects and study them separately. The extents to which this method is valid are addressed by varying the distance between the elements. Results show that as long as the flames do not impinge on the heat exchanger surface, a linear network modeling approach can be applied to construct the acoustic response of the composed configuration from the responses of its constituting elements. This approach requires registering the average velocity on a properly chosen intermediate plane between the burner and heat exchanger. Choosing this plane may be to some point difficult, i.e. when the burner and heat exchanger are close and cannot be considered independent. Moreover, when flame impingement occurs, the interactions between the flame and heat exchanger affect their individual thermoacoustic behaviors and the burner plus heat exchanger assembly needs to be considered as one coupled acoustic element. Particularly, flame impingement changes the phase of the heat absorption response of the heat exchanger and it may significantly alter the acoustic properties of the coupled assembly. The physics lying behind the effects of such interactions on the thermoacoustics of the system is discussed. The obtained results signify that a correct stability prediction of an appliance with burner and heat exchangers requires considering active thermoacoustic behavior of both elements as well as their interactions.

Place, publisher, year, edition, pages
Elsevier, 2018
Keywords
Combustion instability, Heat exchanger, Laminar flame, Thermoacoustic, Transfer function, Transfer matrix
National Category
Energy Engineering
Identifiers
urn:nbn:se:kth:diva-227580 (URN)10.1016/j.combustflame.2018.01.030 (DOI)000430527600041 ()2-s2.0-85042121307 (Scopus ID)
Funder
EU, FP7, Seventh Framework Programme
Note

QC 20180509

Available from: 2018-05-09 Created: 2018-05-09 Last updated: 2018-05-15Bibliographically approved
Zea, E. & Lopez Arteaga, I. (2018). On modified wavenumber filters for rail contribution estimations [Letter to the editor]. Journal of the Acoustical Society of America, 144, EL286-EL289
Open this publication in new window or tab >>On modified wavenumber filters for rail contribution estimations
2018 (English)In: Journal of the Acoustical Society of America, ISSN 0001-4966, E-ISSN 1520-8524, Vol. 144, p. EL286-EL289Article in journal, Letter (Refereed) Published
Abstract [en]

This brief communication exposes an overview of various wavenumber filters to separate the rail contribution to pass-by noise via the wave signature extraction method [Zea, Manzari, Squicciarini, Feng, Thompson, and Lopez Arteaga, J. Sound Vib. 409, 24–42 (2017)]. It has been found that the originally proposed filters underesti- mate the rail noise at frequencies above 1.6 kHz due to the presence of higher-order wave families that is unaccounted for. The goal of this let- ter is thus to propose and examine different filter functions that can cap- ture such waves, and to assess whether the rail contribution estimations can be improved.

National Category
Fluid Mechanics and Acoustics Vehicle Engineering
Research subject
Vehicle and Maritime Engineering
Identifiers
urn:nbn:se:kth:diva-236475 (URN)10.1121/1.5063453 (DOI)
Funder
Swedish Research Council, 2016-04366
Note

QC 20181019

Copyright 2018 Acoustical Society of America. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the Acoustical Society of America.

The following article appeared in The Journal of the Acoustical Society of America 144, EL286 (2018) and may be found at http://asa.scitation.org/doi/10.1121/1.5063453.

Available from: 2018-10-17 Created: 2018-10-17 Last updated: 2018-10-19Bibliographically approved
Zea, E. & Lopez Arteaga, I. (2018). Simplified wave signature extraction method for rail contribution estimations. In: : . Paper presented at Euronoise.
Open this publication in new window or tab >>Simplified wave signature extraction method for rail contribution estimations
2018 (English)Conference paper, Published paper (Other academic)
Abstract [en]

The present paper investigates a modified implementation of the wave signature extraction (WSE) method [1], whose aim is to separate the rail contribution to the pass-by noise of railway vehicles. The method requires a line microphone array parallel to the rail, and two accelerometers on the rail in the vertical and lateral direction. The motivation for this work is the need to separate the rail contribution to the pass-by noise of railway vehicles. The WSE method [1] is based on the wavenumber domain filtering of pass-by data measured with a microphone array located in the near-field of the rail. The filter design does not require a priori information of the structural properties of the rail, since the required information is obtained from array pressure data and rail vibration data before and after the train passes in front of the array. The filter is such that it extracts the dispersion plot branches of the first family of horizontal and vertical bending waves (moving band-pass filter). Although the comparison with TWINS simulation data provides very promising results, there are discrepancies at the higher frequencies, possibly due to the onset of new bending wave families. Therefore in the present paper we assess the performance of a simplified WSE method, where a moving low-pass filter is used instead, and the results are compared to the original WSE implementation and the TWINS simulation data. We show that the results in the higher frequency range are improved with respect to the original WSE implementation.

[1] Zea et al. Journal of Sound and Vibration 409, pp. 24–42, 2017

National Category
Vehicle Engineering Fluid Mechanics and Acoustics
Research subject
Vehicle and Maritime Engineering
Identifiers
urn:nbn:se:kth:diva-229675 (URN)
Conference
Euronoise
Funder
EU, Horizon 2020, 636032
Available from: 2018-06-05 Created: 2018-06-05 Last updated: 2018-06-14Bibliographically approved
Lundberg, O., Kari, L. & Lopez Arteaga, I. (2017). A compact internal drum test rig for measurements of rolling contact forces between a single tread block and a substrate. Measurement, 103, 370-378
Open this publication in new window or tab >>A compact internal drum test rig for measurements of rolling contact forces between a single tread block and a substrate
2017 (English)In: Measurement, ISSN 0263-2241, E-ISSN 1873-412X, Vol. 103, p. 370-378Article in journal (Refereed) Published
Abstract [en]

A novel test rig design is presented which enables detailed studies of the three force components generated in the impact and release phase of rolling contact between a tyre tread block and a substrate. The design of the compact internal drum test rig provides realistic impact and release angles for the tread block-substrate contact and enables force measurements at high rolling speeds with a high signal-to-noise ratio. Measurements of the rolling contact forces are presented for different values of rolling velocity, static pre-load and acceleration. It is demonstrated that this test rig provides results which contribute to the understanding of tyre road interaction and can be used as input to modelling-based development of both tyres and roads aiming for improved handling, safety, energy efficiency and comfort.

Place, publisher, year, edition, pages
Elsevier, 2017
Keywords
Tread block, Road, Contact forces, Rubber friction, Rolling contact, Test rig
National Category
Vehicle Engineering
Identifiers
urn:nbn:se:kth:diva-207648 (URN)10.1016/j.measurement.2016.12.041 (DOI)000400033300038 ()2-s2.0-84994633128 (Scopus ID)
Note

QC 20170607

Available from: 2017-06-07 Created: 2017-06-07 Last updated: 2017-11-10Bibliographically approved
Amlinger, H., Lopez Arteaga, I. & Leth, S. (2017). Impact of PWM switching frequency on the radiated acoustic noise from a traction motor. In: 2017 20th International Conference on Electrical Machines and Systems, ICEMS 2017: . Paper presented at 20th International Conference on Electrical Machines and Systems, ICEMS 2017, 11 August 2017 through 14 August 2017. Institute of Electrical and Electronics Engineers Inc.
Open this publication in new window or tab >>Impact of PWM switching frequency on the radiated acoustic noise from a traction motor
2017 (English)In: 2017 20th International Conference on Electrical Machines and Systems, ICEMS 2017, Institute of Electrical and Electronics Engineers Inc. , 2017Conference paper, Published paper (Refereed)
Abstract [en]

The radiated acoustic noise from a traction motor at low speeds is dominated by the noise of electromagnetic origin. For a motor operated from pulse width modulated (PWM) converters, the switching frequency of the converter will have a large impact on the noise. The total harmonic distortion of the motor phase currents and thus also the exciting forces, will decrease with increasing switching frequency. Furthermore, changing the switching frequency will shift the frequencies of the exciting forces, hence have an influence on the coincidence with structural resonances of the motor. Tests have been performed on a traction motor and a decrease in sound pressure level with increasing switching frequency has been quantified and analyzed.

Place, publisher, year, edition, pages
Institute of Electrical and Electronics Engineers Inc., 2017
Keywords
Acoustic noise, Pulse width modulation (PWM), Switching frequency, Traction motor, Electric machinery, Pulse width modulation, Switching, Voltage control, Exciting forces, Low speed, Motor phase, Pulse width modulated converters, Sound pressure level, Structural resonance, Total harmonic distortion (THD), Traction motors
National Category
Vehicle Engineering
Identifiers
urn:nbn:se:kth:diva-227093 (URN)10.1109/ICEMS.2017.8056206 (DOI)2-s2.0-85034653627 (Scopus ID)9781538632468 (ISBN)
Conference
20th International Conference on Electrical Machines and Systems, ICEMS 2017, 11 August 2017 through 14 August 2017
Note

QC 20180515

Available from: 2018-05-15 Created: 2018-05-15 Last updated: 2018-05-15Bibliographically approved
Temiz, M. A., Tournadre, J., Lopez Arteaga, I. & Hirschberg, A. (2017). Modelling vibro-acoustic coupling in flexible micro-perforated plates by a patch-impedance approach. Applied Acoustics, 125, 80-90
Open this publication in new window or tab >>Modelling vibro-acoustic coupling in flexible micro-perforated plates by a patch-impedance approach
2017 (English)In: Applied Acoustics, ISSN 0003-682X, E-ISSN 1872-910X, Vol. 125, p. 80-90Article in journal (Refereed) Published
Abstract [en]

This study proposes a Finite Element (FE)-based efficient numerical model of the vibro-acoustic coupling in flexible micro-perforated plates (f-MPPs) where each perforation is described as an imposed impedance boundary condition (uniform impedance patch) on the plate. This approach opens the possibility of predicting the influence of perforation distribution on the acoustic performance of f:MPP. Micro perforated plates have been a topic of interest as a promising sound absorber in a wide range of applications, from room acoustics to combustion systems. One great advantage of these plates is that it gives the designer the freedom of choice on material in production. Depending on the material and the dimensions, the acoustical modes of the medium can couple with the structural modes of the plate. This coupling changes the number of absorption peaks, frequency and amplitude of the Helmholtz resonance of the system, therefore the coupling becomes an extra parameter in the design process. Current analytical models superpose the mechanical impedance of the plate with the acoustic impedance of the perforations to compute this coupling. This approach works fairly well for plates with uniform perforation distribution. This study proposes a numerical method which assumes perforations as discrete impedance patches on the flexible plate so that they can be considered separately. The method couples the solution of the Helmholtz equation in air with shell plate theory to model the vibro-acoustic effects and the impedance patches are represented as imposed transfer impedance boundary conditions. The assessment of the method is performed in terms of comparing the calculated absorption coefficient values from the simulations of several test cases, fundamental theories and measurement results from the literature. The simulation results agree both with these theoretical limits and measurement results. The use of the method is illustrated by considering an example of the influence of modification of the spatial distribution of perforations on the sound absorption of a membrane.

Place, publisher, year, edition, pages
ELSEVIER SCI LTD, 2017
Keywords
Flexible micro-perforated plates, Vibro-acoustic coupling, Acoustic transfer impedance, Absorption coefficient, Finite element method
National Category
Fluid Mechanics and Acoustics
Identifiers
urn:nbn:se:kth:diva-210330 (URN)10.1016/j.apacoust.2017.04.012 (DOI)000403117600009 ()2-s2.0-85018632998 (Scopus ID)
Note

QC 20170705

Available from: 2017-07-05 Created: 2017-07-05 Last updated: 2017-07-05Bibliographically approved
Lopez Arteaga, I. (2017). Vibro-acoustic sources in ground transportation. In: Proceedings of ACOUSTICS 2017 Perth: Sound, Science and Society - 2017 Annual Conference of the Australian Acoustical Society, AAS 2017. Paper presented at ACOUSTICS 2017 Perth: Sound, Science and Society - 2017 Annual Conference of the Australian Acoustical Society, AAS 2017, Pan Pacific HotelPerth, Australia, 19 November 2017 through 22 November 2017. Australian Acoustical Society
Open this publication in new window or tab >>Vibro-acoustic sources in ground transportation
2017 (English)In: Proceedings of ACOUSTICS 2017 Perth: Sound, Science and Society - 2017 Annual Conference of the Australian Acoustical Society, AAS 2017, Australian Acoustical Society , 2017Conference paper, Published paper (Refereed)
Abstract [en]

Long term exposure to ground transportation (road and rail traffic) noise is, after air pollution, the main environmentrelated health stressor in densely populated areas and compromises the quality of life and, indirectly, the life expectations of millions of people. At speeds up to 130 km/h in road traffic and up to 300 km/h in rail traffic the main source of noise is the tyre/road (respectively wheel/rail) interaction. In this paper the sound and vibration generation mechanisms due to tyre/road and wheel/rail interaction are discussed, focusing on the similarities and differences between the sound and vibration generation mechanisms in these two systems. This perspective is further extended to the discussion of contact force modelling and characterization methods in both road and rail traffic systems.

Place, publisher, year, edition, pages
Australian Acoustical Society, 2017
National Category
Transport Systems and Logistics
Identifiers
urn:nbn:se:kth:diva-222510 (URN)2-s2.0-85041307001 (Scopus ID)9780909882075 (ISBN)
Conference
ACOUSTICS 2017 Perth: Sound, Science and Society - 2017 Annual Conference of the Australian Acoustical Society, AAS 2017, Pan Pacific HotelPerth, Australia, 19 November 2017 through 22 November 2017
Note

QC 20180212

Available from: 2018-02-12 Created: 2018-02-12 Last updated: 2018-02-12Bibliographically approved
Chen, L. S., Polifke, W., Hosseini, N., Teerling, O. J., Lopez Arteaga, I., Kornilov, V. & De Goey, P. (2016). Acoustic scattering behavior of a 2D flame with heat exchanger in cross-flow. In: ICSV 2016 - 23rd International Congress on Sound and Vibration: From Ancient to Modern Acoustics. Paper presented at 23rd International Congress on Sound and Vibration, ICSV 2016, 10 July 2016 through 14 July 2016. International Institute of Acoustics and Vibrations
Open this publication in new window or tab >>Acoustic scattering behavior of a 2D flame with heat exchanger in cross-flow
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2016 (English)In: ICSV 2016 - 23rd International Congress on Sound and Vibration: From Ancient to Modern Acoustics, International Institute of Acoustics and Vibrations , 2016Conference paper, Published paper (Refereed)
Abstract [en]

In practical heat production systems, premixed flames with cold heat exchanger in cross-flow is a widely used configuration. Self-excited thermoacoustic instabilities often occur in such systems. A practical way to predict the presence of the instabilities is the network model approach. In the present study, the configuration flame - heat exchanger is analyzed numerically. We first analyze the system as a network of segregated elements. Based on the resulting acoustic scattering matrix, the role of the heat exchanger as an amplifier of the flame resonant frequencies will be discussed. Then, results from the 1D network modeling are compared to results of compressible numerical simulations, performed for several distances between flame and heat exchanger. Finally, the limits to the validity of the segregated network model approach are discussed.

Place, publisher, year, edition, pages
International Institute of Acoustics and Vibrations, 2016
Keywords
Acoustic field measurement, Heat exchangers, Natural frequencies, Thermoacoustics, Acoustic Scattering, Cross flows, Heat production, Network modeling, Premixed Flame, Segregated network, Self - excited, Thermoacoustic instability, Acoustic wave scattering
National Category
Fluid Mechanics and Acoustics Aerospace Engineering
Identifiers
urn:nbn:se:kth:diva-195558 (URN)2-s2.0-84987909227 (Scopus ID)9789609922623 (ISBN)
Conference
23rd International Congress on Sound and Vibration, ICSV 2016, 10 July 2016 through 14 July 2016
Note

Funding Details: FP7-PEOPLE-ITN-2012, EC, European Commission

QC 20161115

Available from: 2016-11-15 Created: 2016-11-03 Last updated: 2016-11-15Bibliographically approved
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ORCID iD: ORCID iD iconorcid.org/0000-0002-3609-3005

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