Article
Computer Science, Interdisciplinary Applications
Romain Rumpler, Quirin Aumann
Summary: This paper presents the multivariate well-conditioned asymptotic waveform evaluation (MWCAWE) algorithm, which is based on a univariate version of the algorithm previously introduced for fast frequency sweeps. By exploiting the robustness of the univariate algorithm, the MWCAWE algorithm effectively generates multi-parameter reduced-order models. Furthermore, a residue-based contour following approach is introduced for a two-stage generation of a projection basis, specifically applied to bi-variate acoustic problems emphasizing frequency and material parameter.
JOURNAL OF COMPUTATIONAL PHYSICS
(2023)
Article
Engineering, Multidisciplinary
Alexander V. Mamonov, Maxim A. Olshanskii
Summary: This paper presents a reduced order model (ROM) for numerical integration of a dynamical system with multiple parameters. The ROM utilizes compressed tensor formats to find a low rank representation for high-fidelity snapshots of the system state. The computational cost of the online phase depends only on tensor compression ranks, making it efficient and accurate.
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
(2022)
Article
Acoustics
Quirin Aumann, Gerhard Mueller
Summary: Robust and efficient automatic model order reduction is crucial in vibro-acoustic structure design. Reliable error estimation techniques are necessary for accurate assessment of reduction error, especially in a specific frequency range.
JOURNAL OF SOUND AND VIBRATION
(2023)
Article
Computer Science, Interdisciplinary Applications
Ananya Roy, M. Nabi, Najmur Rahman
Summary: This paper discusses the common applications and modeling methods of electrothermal microgrippers, highlighting the limitations of traditional parametric model order reduction methods in cases of geometric parameter variations. A new matrix interpolation method is proposed to address this issue, demonstrating its effectiveness through simulation results.
JOURNAL OF COMPUTATIONAL DESIGN AND ENGINEERING
(2021)
Article
Computer Science, Interdisciplinary Applications
Quincy A. Huhn, Mauricio E. Tano, Jean C. Ragusa, Youngsoo Choi
Summary: Dynamic Mode Decomposition (DMD) is a model-order reduction technique that extracts spatial modes of fixed temporal frequencies from numerical or experimental data. This paper presents two novel approaches to parametric DMD: one based on interpolation of the reduced-order DMD eigen-pair and the other based on interpolation of the reduced DMD (Koopman) operator. Numerical results are provided for diffusion-dominated nonlinear dynamical problems, including a multiphysics radiative transfer example. The three parametric DMD approaches are compared.
JOURNAL OF COMPUTATIONAL PHYSICS
(2023)
Article
Engineering, Multidisciplinary
Dionysios Panagiotopoulos, Wim Desmet, Elke Deckers
Summary: This article introduces a model order reduction technique for acoustic boundary element method (BEM) systems using a multiparameter Krylov subspaces recycling scheme. The proposed scheme enables fast solution of parametric acoustic systems and reduces the required sampling.
INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN ENGINEERING
(2022)
Article
Engineering, Mechanical
Danish Rafiq, Mohammad Abid Bazaz
Summary: This paper presents a generalized framework for nonlinear systems with an efficient sampling strategy for a two-dimensional parametric space, aiming to enhance the approximating quality of the interpolated reduced models. The proposed framework is substantiated through a suite of nonlinear benchmark models.
NONLINEAR DYNAMICS
(2022)
Article
Acoustics
Yue Li, Onur Atak, Stijn Jonckheere, Wim Desmet
Summary: This paper investigates the challenge of accelerating frequency-domain acoustic simulations using a matrix-free method. It applies rational Krylov projection based model order reduction (MOR) technology to boundary element methods (BEM), avoiding interference with BEM kernels and working with existing fast BEM techniques. The combination of matrix-free MOR and fast BEM techniques achieves significant speed-ups in wideband BEM simulations.
JOURNAL OF SOUND AND VIBRATION
(2022)
Article
Mathematics, Applied
Maria Strazzullo, Fabio Vicini
Summary: In this paper, we propose a tailored model order reduction method for varying boundary optimal control problems governed by parametric partial differential equations. The peculiar formulation of varying boundary control might benefit from model order reduction, as fast and reliable simulations of this model can be highly useful in fields such as geophysics and energy engineering. We compare classical model order reduction techniques with reduced approaches inspired by wave-like phenomena in order to address the challenges posed by the complicated and diversified parametric behavior of the state and adjoint variables.
APPLIED MATHEMATICS AND COMPUTATION
(2023)
Article
Computer Science, Interdisciplinary Applications
Bastien Bodnar, Walid Larbi, Magdalini Titirla, Jean-Francois Deu, Fabrice Gatuingt, Frederic Ragueneau
Summary: This paper presents a method that combines a hyper-reduction procedure and a non-iterative alpha-OS time-integration scheme for accelerating parametric analyses on damageable civil engineering structures subjected to earthquakes. The method is shown to be applicable and accurate through its application on a specific building model.
COMPUTER-AIDED CIVIL AND INFRASTRUCTURE ENGINEERING
(2023)
Article
Automation & Control Systems
Zhen Li, Yao-Lin Jiang, Hong-liang Mu
Summary: This paper explores model order reduction of parametric systems using tensor techniques and a parallel tensor compression algorithm. The proposed method approximates system matrices using tensor functions, constructs a projection matrix for reduced parametric systems, and shows theoretical stability and efficiency through numerical examples.
INTERNATIONAL JOURNAL OF SYSTEMS SCIENCE
(2021)
Article
Acoustics
Quirin Aumann, Steffen W. R. Werner
Summary: This study compares structure-preserving model reduction methods based on rational interpolation and balanced truncation in terms of their applicability to vibro-acoustic systems. By applying these methods to numerical models, the results demonstrate their effectiveness in terms of accuracy and computational cost, providing guidelines for selecting appropriate model reduction methods.
JOURNAL OF SOUND AND VIBRATION
(2023)
Article
Computer Science, Interdisciplinary Applications
Elwin van 't Wout
Summary: The finite element method (FEM) and the boundary element method (BEM) can numerically solve the Helmholtz system for acoustic wave propagation. The coupled FEM-BEM algorithm combines the strengths of each technique, handling heterogeneous regions with FEM and modeling homogeneous exterior with BEM. This study proposes a regulariser based on the on-surface radiation conditions to improve the convergence of iterative linear solvers significantly.
JOURNAL OF COMPUTATIONAL PHYSICS
(2022)
Article
Acoustics
Konstantinos Vlachas, Konstantinos Tatsis, Konstantinos Agathos, Adam R. Brink, Eleni Chatzi
Summary: Efficient condition assessment of engineered systems requires coupling high fidelity models with data extracted from the current system state. This paper proposes a parametric Model Order Reduction (pMOR) scheme for nonlinear structural dynamics, demonstrating its performance on different case studies.
JOURNAL OF SOUND AND VIBRATION
(2021)
Article
Construction & Building Technology
Lenin Babu Mailan Chinnapandi, Jeyaraj Pitchaimani, Mohamed A. Eltaher
Summary: This manuscript presents a comprehensive model to study the vibro-acoustic behavior of functionally graded beams under thermal and mechanical loads, taking into account the effect of porosity. The numerical analysis and parametric studies reveal that the nature of porosity affects the sound radiation behavior.
STEEL AND COMPOSITE STRUCTURES
(2022)
Article
Engineering, Multidisciplinary
Dionysios Panagiotopoulos, Wim Desmet, Elke Deckers
Summary: In this work, a method is proposed to accelerate the solution of multiresolution analyses of affine parametric systems by decoupling the system solution from the construction of the recycled subspace. The method follows the logic of projection-based Model Order Reduction and proves particularly beneficial for affine parametrizations involving multiple affine coefficients.
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
(2023)
Article
Engineering, Chemical
Simone Gallas, Iman Sabahi, Lucas Van Belle, Jan Croes, Frank Naets, Wim Desmet
Summary: In the past few decades, there has been a growing trend towards combining lightweight materials with traditional metals. In these cases, traditional joining methods such as bolting and welding need to be re-evaluated, and adhesive bonding can be a viable alternative. This study aims to compare the vibrational response of assemblies when using bolts versus adhesive bonding, particularly in terms of modal frequency, shape, and damping. The results show that in the low to mid-frequency range of 0-250 Hz, replacing bolts with adhesive bonding has minimal impact on mode shapes but can significantly increase modal damping values and frequencies.
JOURNAL OF ADHESION
(2023)
Article
Engineering, Mechanical
Thijs Willems, Felix Simeon Egner, Yonggang Wang, Matteo Kirchner, Wim Desmet, Frank Naets
Summary: A novel approach is proposed for time-domain system identification of structural dynamic components using high spatial density vision-based measurements. The approach extracts a relatively noise-free, low-order set of dynamic states from spatially dense measurements and uses them for identification of structural dynamic parameters. The method is characterized by its simplicity, ease of implementation, and high time-efficiency.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2023)
Article
Acoustics
Yue Li, Jacques Cuenca, Laurent De Ryck, Mansour Alkmim, Onur Atak, Wim Desmet, Giulio Dolcetti, Anton Krynkin
Summary: This paper proposes a method for characterizing rough surfaces of finite size in terms of their roughness shape and surface impedance using a superposition of spatial sinusoidal components and a porous material model. The method improves computational efficiency by simplifying the target geometry as a thin shell representation. A subtraction method is proposed to mitigate the modeling error, and a discretization criterion is defined to ensure modeling accuracy. The inverse problem is solved by minimizing the difference between the simulated and reference acoustic field.
JOURNAL OF SOUND AND VIBRATION
(2023)
Article
Engineering, Mechanical
Shuyang Zhang, Hendrik Devriendt, Lucas Van Belle, Wim Desmet
Summary: Adhesive bonding is increasingly important in mechanical systems, and finite element models are commonly used to accurately predict their dynamic behavior. However, these models can be computationally expensive for large systems. This work proposes improvements to the Craig-Bampton method and extends it to parametric model order reduction for viscoelastic substructures with adhesive joints. The proposed approach demonstrates accuracy and reduction in computation time through numerical examples.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2023)
Article
Engineering, Mechanical
Felix Simeon Egner, Luca Sangiuliano, Regis Fabien Boukadia, Sjoerd van Ophem, Wim Desmet, Elke Deckers
Summary: This paper proposes a mesh-free, inherently smoothing, polynomial filtering approach based on stereo camera measurement for structural intensity analysis on curved plates. Numerical studies are conducted to determine the algorithm parameters and their performance for different levels of uncertainty and displacement fields. Experimental validation on flat plate and curved plate cases shows good agreement and qualitative conclusions can be drawn.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2023)
Article
Acoustics
Stefan Janssen, Lucas Van Belle, Noe Geraldo Rocha de Melo Filho, Wim Desmet, Claus Claeys, Elke Deckers
Summary: Locally resonant vibro-acoustic metamaterials have emerged as a promising lightweight solution with favorable noise and vibration attenuation due to their stop band behavior. However, their insulation performance is often hindered by a strong dip following the peak insulation. This study extends and demonstrates the concept of dip reduction to address this issue in a realizable metamaterial panel while preserving peak insulation performance and total mass addition. A design framework is presented to achieve practically realizable dip-reduced metamaterial panel designs based on lumped parameter and finite-element model optimizations.
Article
Engineering, Mechanical
Jordi Marco Jordan, Bart Blockmans, Wim Desmet
Summary: A comparative assessment of analytical gear mesh stiffness modelling techniques is conducted, leading to an optimized method for spur and helical gear stiffness modelling. By selectively combining different analytical methods from literature, the total stiffness of a spur gear pair is obtained as a series and parallel connection of springs. The model is then extended to analytically compute the contact stiffness of helical gears, including axial stiffness and slice coupling effects, using exponential decay functions and the moment image method. The novel method is numerically validated through comparisons with finite element simulations.
MECHANISM AND MACHINE THEORY
(2023)
Article
Engineering, Mechanical
Kristof Steijvers, Claus Claeys, Lucas Van Belle, Elke Deckers
Summary: The study investigates the benefits of incorporating injection molding simulations into structural dynamic modeling, resulting in improved predictions of the performance of manufactured resonators.
JOURNAL OF VIBRATION ENGINEERING & TECHNOLOGIES
(2023)
Correction
Acoustics
Vanessa Cool, Lucas Van Belle, Claus Claeys, Elke Deckers, Wim Desmet
JOURNAL OF VIBRATION AND ACOUSTICS-TRANSACTIONS OF THE ASME
(2023)
Article
Acoustics
Fabio Di Giusto, Sjoerd van Ophem, Wim Desmet, Elke Deckers
Summary: This paper assesses the impact of photogrammetric error on individual Head-Related Transfer Functions (HRTFs), finding that the high frequency spectral features deviate due to the scanning error. By merging the photogrammetric geometry with laser scan data, the influence of inaccuracies in different pinna structures is evaluated. Correlation analysis between acoustic and geometric metrics identifies the most relevant geometric metrics in relation to the HRTFs.
Article
Engineering, Mechanical
Xuanen Kan, Yanjun Lu, Fan Zhang, Weipeng Hu
Summary: A blade disk system is crucial for the energy conversion efficiency of turbomachinery, but differences between blades can result in localized vibration. This study develops an approximate symplectic method to simulate vibration localization in a mistuned bladed disk system and reveals the influences of initial positive pressure, contact angle, and surface roughness on the strength of vibration localization.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2024)
Article
Engineering, Mechanical
Zimeng Liu, Cheng Chang, Haodong Hu, Hui Ma, Kaigang Yuan, Xin Li, Xiaojian Zhao, Zhike Peng
Summary: Considering the calculation efficiency and accuracy of meshing characteristics of gear pair with tooth root crack fault, a parametric model of cracked spur gear is established by simplifying the crack propagation path. The LTCA method is used to calculate the time-varying meshing stiffness and transmission error, and the results are verified by finite element method. The study also proposes a crack area share index to measure the degree of crack fault and determines the application range of simplified crack propagation path.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2024)
Article
Engineering, Mechanical
Rongjian Sun, Conggan Ma, Nic Zhang, Chuyo Kaku, Yu Zhang, Qirui Hou
Summary: This paper proposes a novel forward calculation method (FCM) for calculating anisotropic material parameters (AMPs) of the motor stator assembly, considering structural discontinuities and composite material properties. The method is based on multi-scale theory and decouples the multi-scale equations to describe the equivalence and equivalence preconditions of AMPs of two scale models. The effectiveness of this method is verified by modal experiments.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2024)
Article
Engineering, Mechanical
Hao Zhang, Jiangcen Ke
Summary: This research introduces an intelligent scheduling system framework to optimize the ship lock schedule of the Three Gorges Hub. By analyzing navigational rules, operational characteristics, and existing problems, a mixed-integer nonlinear programming model is formulated with multiple objectives and constraints, and a hybrid intelligent algorithm is constructed for optimization.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2024)
Article
Engineering, Mechanical
Jingjing He, Xizhong Wu, Xuefei Guan
Summary: A sensitivity and reliability enhanced ultrasonic method has been developed in this study to monitor and predict stress loss in pre-stressed multi-layer structures. The method leverages the potential breathing effect of porous cushion materials in the structures to increase the sensitivity of the signal feature to stress loss. Experimental investigations show that the proposed method offers improved accuracy, reliability, and sensitivity to stress change.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2024)
Article
Engineering, Mechanical
Benyamin Hosseiny, Jalal Amini, Hossein Aghababaei
Summary: This paper presents a method for monitoring sub-second or sub-minute displacements using GBSAR signals, which employs spectral estimation to achieve multi-dimensional target detection. It improves the processing of MIMO radar data and enables high-resolution fast displacement monitoring from GBSAR signals.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2024)
Article
Engineering, Mechanical
Xianze Li, Hao Su, Ling Xiang, Qingtao Yao, Aijun Hu
Summary: This paper proposes a novel method for bearing fault identification, which can accurately identify faults with few samples under complex working conditions. The method is based on a Transformer meta-learning model, and the final result is determined by the weighted voting of multiple models.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2024)
Article
Engineering, Mechanical
Xiaomeng Li, Yi Wang, Guangyao Zhang, Baoping Tang, Yi Qin
Summary: Inspired by chaos fractal theory and slowly varying damage dynamics theory, this paper proposes a new health monitoring indicator for vibration signals of rotating machinery, which can effectively monitor the mechanical condition under both cyclo-stationary and variable operating conditions.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2024)
Article
Engineering, Mechanical
Hao Wang, Songye Zhu
Summary: This paper extends the latching mechanism to vibration control to improve energy dissipation efficiency. An innovative semi-active latched mass damper (LMD) is proposed, and different latching control strategies are tested and evaluated. The latching control can optimize the phase lag between control force and structural response, and provide an innovative solution to improve damper effectiveness and develop adaptive semi-active dampers.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2024)
Article
Engineering, Mechanical
Menghao Ping, Xinyu Jia, Costas Papadimitriou, Xu Han, Chao Jiang, Wang-Ji Yan
Summary: Identification of non-Gaussian processes is a challenging task in engineering problems. This article presents an improved orthogonal series expansion method to convert the identification of non-Gaussian processes into a finite number of non-Gaussian coefficients. The uncertainty of these coefficients is quantified using polynomial chaos expansion. The proposed method is applicable to both stationary and nonstationary non-Gaussian processes and has been validated through simulated data and real-world applications.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2024)
Article
Engineering, Mechanical
Lei Li, Wei Yang, Dongfa Li, Jianxin Han, Wenming Zhang
Summary: The frequency locking phenomenon induced by modal coupling can effectively overcome the dependence of peak frequency on driving strength in nonlinear resonant systems and improve the stability of peak frequency. This study proposes the double frequencies locking phenomenon in a three degrees of freedom (3-DOF) magnetic coupled resonant system driven by piezoelectricity. Experimental and theoretical investigations confirm the occurrence of first frequency locking and the subsequent switching to second frequency locking with the increase of driving force. Furthermore, a mass sensing scheme for double analytes is proposed based on the double frequencies locking phenomenon.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2024)
Article
Engineering, Mechanical
Kai Ma, Jingtao Du, Yang Liu, Ximing Chen
Summary: This study explores the feasibility of using nonlinear energy sinks (NES) as replacements for traditional linear tuned mass dampers (TMD) in practical engineering applications, specifically in diesel engine crankshafts. The results show that NES provides better vibration attenuation for the crankshaft compared to TMD under different operating conditions.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2024)
Article
Engineering, Mechanical
Wentao Xu, Li Cheng, Shuaihao Lei, Lei Yu, Weixuan Jiao
Summary: In this study, a high-precision hydraulic mechanical stand and a vertical mixed-flow pumping station device were used to conduct research on cavitation signals of mixed-flow pumps. By analyzing the water pressure pulsation signal, it was found that the power spectrum density method is more sensitive and capable of extracting characteristics compared to traditional time-frequency domain analysis. This has significant implications for the identification and prevention of cavitation in mixed-flow pump machinery.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2024)
Article
Engineering, Mechanical
Xiaodong Chen, Kang Tai, Huifeng Tan, Zhimin Xie
Summary: This paper addresses the issue of parasitic motion in microgripper jaws and its impact on clamping accuracy, and proposes a symmetrically stressed parallelogram mechanism as a solution. Through mechanical modeling and experimental validation, the effectiveness of this method is demonstrated.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2024)
Article
Engineering, Mechanical
Zhifeng Shi, Gang Zhang, Jing Liu, Xinbin Li, Yajun Xu, Changfeng Yan
Summary: This study provides useful guidance for early bearing fault detection and diagnosis by investigating the effects of crack inclination and propagation direction on the vibration characteristics of bearings.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2024)