Experimental structure-borne energy flow contribution analysis for vibro-acoustic source ranking

Acri, Antonio; Nijman, Eugène; Conrado, Edoardo; Offner, Günter

doi:10.1016/j.ymssp.2018.06.050

Cited by 9 publications

(8 citation statements)

References 33 publications

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“…However, experience has shown that vibration and acoustic predictions using these models were often did not correlate with the experimental results, so these models should be updated (Zhou et al, 2020). In the model updating framework, the influence of housing structure and vibroacoustic parameters on the stiffness and damping modeling errors should be considered simultaneously to obtain an accurate estimation of those parameters (Sánchez et al, 2017;Acri et al, 2019). It should also be noted that acoustic absorption characteristics usually depend on the frequency.…”

Section: Introductionmentioning

confidence: 99%

“…The locally resonant PGR is much heavier than the housing itself, which is disadvantageous to engineering applications (Liang et al, 2018;Yang et al, 2021;Ege et al, 2018). The increasing demand for stable performance in harsh environments such as vibration and noise has led to the noise control problem of PGR housings to the forefront (Arasan et al, 2021;Guo et al, 2014;Kosała, 2019). The results showed that the vibration of the housing structure, sound field, and damping coupling interface affected the noise in the PGR (Marchetti et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

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Vibroacoustic characteristics analysis of a planetary gear reducer considering the exterior housing structure

et al. 2021

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Abstract. Previous studies have attempted to identify weak links in the dynamic characteristics of the planetary gear reducer (PGR) exterior body structure (EBS). Through numerical simulation, these studies analyzed the mode and natural frequencies and the vibration types of each order of the EBS. However, these scholars have never focused on the main factors affecting the dynamic characteristics of the EBS of this subject. This study in the topic has analyzed the vibroacoustic characteristics of an EBS and optimized its design using numerical simulation. Herein, the contribution of the vibration transfer path from the excitation points on the exterior body to the machine foot is emphatically revealed, and the influences of the main structural parameters on the transfer characteristics are discussed. An optimal EBS for a PGR with lower acoustic vibrations is designed in detail, and a composite EBS with damping vibration attenuation and acoustic absorption is proposed. The radiation acoustic characteristics without acoustic protection and damping materials are analyzed. These research results are implemented in order to realize the dynamic characteristics, transmission, and radiation acoustic characteristics as objects of optimization, and the structural design parameters of the PGR exterior body are deeply optimized using dynamic modification and sensitivity analysis. This topic focuses on the vibroacoustic coupling of EBS in stationary fluid and average flow field. Based on the analysis method of theoretical modeling and numerical calculation, the EBS dynamic response and vibroacoustic characteristics under the action of frontal excitation external acoustic flow field are studied, which will be beneficial to explore the comprehensive optimization design of PGR dynamic and vibroacoustic properties.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Vibroacoustic characteristics analysis of a planetary gear reducer considering the exterior housing structure

et al. 2021

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show abstract

“…However, experience has shown that vibration and acoustic predictions using these models are often did not correlate with the experimental results, so these models should be updated [8]. In the model updating framework, the influence of EBS and vibroacoustic parameters on the stiffness and damping modeling errors should be considered simultaneously to obtain an accurate estimation of those parameters [9,10]. It should also be noted that acoustic absorption characteristics usually depend on the frequency dependent.…”

Section: Introductionmentioning

confidence: 99%

Numerical simulation analysis of a PGR exterior body structure considering vibroacoustic characteristics

Ji¹,

Wang²,

Wang³

et al. 2021

J. vibroeng.

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Previous studies have attempted to identify weak links in the dynamic characteristics of the planetary gear reducer (PGR) exterior body structure (EBS). Through numerical simulation, these studies analyzed the modals and natural frequencies and the vibration types of each order of the EBS. However, these scholars have never focused on the main factors affecting the dynamic characteristics of the EBS of this subject. This study in the topic has analyzed the vibroacoustic characteristics of an EBS and optimized its design using numerical simulation. Herein, the contribution of the vibration transfer path from the excitation points on the exterior body to the machine foot is emphatically revealed, and the influences of the main structural parameters on the transfer characteristics are discussed. An optimal EBS for a PGR with lower acoustic vibrations is designed in detail, and a composite EBS with damping vibration attenuation and acoustic absorption is proposed. The radiation acoustic characteristics without acoustic protection and damping materials are analyzed. These research results are implemented in order to realize the dynamic characteristics, transmission, and radiation acoustic characteristics as objects of optimization, and the structural design parameters of the PGR exterior body are deeply optimized using dynamic modification and sensitivity analysis. This topic focuses on the vibroacoustic coupling of EBS in stationary fluid and average flow field, based on the analysis method of theoretical modeling and numerical calculation, the EBS dynamic response and vibroacoustic characteristics under the action of frontal excitation external acoustic flow field are studied, which will be beneficial to explore the comprehensive optimization design of GPR dynamic and vibroacoustic properties.

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“…It is important to possess some professional design knowledge while studying the unique kinematics and geometric characteristics of a TsSCS consisting of a planetary transmission with dual-power branches (Ege et al, 2018). The TsSCS, with a dual-power branch planetary transmission, is preferred to the horizontal shaft gear deceleration system, especially in applications requiring high linear speed power density designs and kinematic flexibility to optimize different speed ratios (Marchetti et al, 2020;Garambois et al, 2019;Acri et al, 2019). It has been demonstrated that reducing the spoke thickness to increase gear flexibility also resolves several internal gear and planetary frame errors and operational errors, in addition to making the system lighter (Yang et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

“…In addition, it is easily affected by the quality of the processing and assembly steps. Thus, it is difficult to use these results in the design analysis stage (Arasan et al, 2021). As a result, the experimental analysis is used to verify the results of the analysis of the theoretical model and modify it accordingly.…”

Section: Introductionmentioning

confidence: 99%

Semi-numerical analysis of a two-stage series composite planetary transmission considering incremental harmonic balance and multi-scale perturbation methods

Wang

et al. 2021

Mech. Sci.

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Abstract. This study conducts an analytical investigation of the dynamic response characteristics of a two-stage series composite system (TsSCS) with a planetary transmission consisting of dual-power branches. An improved incremental harmonic balance (IHB) method, which solves the closed solution of incremental parameters passing through the singularity point of the analytical path, based on the arc length extension technique, is proposed. The results are compared with those of the numerical integration method to verify the feasibility and effectiveness of the improved method. Following that, the multi-scale perturbation (MsP) method is applied to the TsSCS proposed in this subject to analyze the parameter excitation and gap nonlinear equations and then to obtain the analytical frequency response functions including the fundamental, subharmonic, and superharmonic resonance responses. The frequency response equations of the primary resonance, subharmonic resonance, and superharmonic resonance are solved to generate the frequency response characteristic curves of the planetary gear system (PGS) in this method. A comparison between the results obtained by the MsP method and the numerical integration method proves that the former is ideal and credible in most regions. Considering the parameters of TsSCS excitation frequency and damping, the nonlinear response characteristics of steady-state motion are mutually converted. The effects of the time-varying parameters and the nonlinear deenthing caused by the gear teeth clearance on the amplitude–frequency characteristics of TsSCS components are studied in this special topic.

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Experimental structure-borne energy flow contribution analysis for vibro-acoustic source ranking

Cited by 9 publications

References 33 publications

Vibroacoustic characteristics analysis of a planetary gear reducer considering the exterior housing structure

Vibroacoustic characteristics analysis of a planetary gear reducer considering the exterior housing structure

Numerical simulation analysis of a PGR exterior body structure considering vibroacoustic characteristics

Semi-numerical analysis of a two-stage series composite planetary transmission considering incremental harmonic balance and multi-scale perturbation methods

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