Article
Engineering, Mechanical
Tianxu Zhu, Genbei Zhang, Chaoping Zang, Haitao Cui, M. I. Friswell
Summary: The paper proposes a novel arclength-based multivalued response matching technique for model updating of strongly nonlinear systems. The method can handle both stable and unstable responses and update the model from linear to strongly nonlinear. Experimental results demonstrate the effectiveness and superiority of the proposed method.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2023)
Article
Computer Science, Interdisciplinary Applications
Arthur Givois, Jean-Francois Deu, Olivier Thomas
Summary: This paper proposes a reduced-order modeling method to predictively simulate the dynamics of piezoelectric structures with geometric nonlinearities, which can efficiently perform numerical simulations and provide a convenient procedure for studying nonlinear dynamics. The focus is on the parametric effect resulting from the combination of geometric nonlinearities and piezoelectricity, with reference results provided for different test cases involving realistic structures.
COMPUTERS & STRUCTURES
(2021)
Article
Materials Science, Multidisciplinary
B. K. Kim, L. Tan, H. Sakasegawa, C. M. Parish, W. Zhong, H. Tanigawa, Y. Katoh
Summary: The study revealed that doping with Ni-58 resulted in greater strengthening contributions from loops and cavities, leading to higher hardening and lower ductility compared to Ni-60 doping in reduced-activation ferritic-martensitic steels under helium irradiation.
JOURNAL OF NUCLEAR MATERIALS
(2021)
Article
Acoustics
E. Delhez, F. Nyssen, J. -C. Golinval, A. Batailly
Summary: This article presents a methodology for vibration analysis of turbomachine blades considering geometric nonlinearities and nonlinear blade-tip/casing contacts. The modal derivatives-based approach was found to be particularly well-suited for accurately describing the blade's dynamics and had a significant impact when accounting for blade-tip/casing contacts.
JOURNAL OF SOUND AND VIBRATION
(2021)
Article
Chemistry, Physical
Kexin Dang, Kehuan Wang, Gang Liu
Summary: This study systematically investigated the dynamic softening and hardening behaviors of TC31 titanium alloy material during high-temperature deformation, exploring the microstructure evolution under factors such as deformation temperature, strain rate, and strain. The results showed that the softening and hardening of the material were dependent on the deformation temperature and strain rate, and changed dynamically with the strain.
Article
Engineering, Geological
Baoyin Sun, Zhenrui Zeng, Yantai Zhang, Wei Shen, Jinping Ou
Summary: This study presents an efficient and accurate nonlinear analysis approach for high-rise framed structures considering the P-A effect. By assuming a constant vertical load for each storey, the structural geometric stiffness induced by the P-A effect can be considered constant. A reduced-order Newton-Raphson method is employed to simplify the iterative analysis and improve efficiency.
SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
(2023)
Article
Engineering, Mechanical
K. Maes, M. N. Chatzis, R. Vandebril, G. Lombaert
Summary: This paper discusses the observability of modally reduced order models with unknown parameters, specifically focusing on a method that accounts for the quasi-static contribution of out-of-band modes using dummy modes. The observability test is conducted using the Observability Rank Condition (ORC) and illustrated with examples from structural engineering. Modally reduced order models are found to be a valuable alternative to full order models in system inversion, being computationally less demanding and allowing for the identification of physical parameters.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2021)
Article
Engineering, Mechanical
J. Marconi, P. Tiso, D. E. Quadrelli, F. Braghin
Summary: An enhanced parametric nonlinear reduced-order model for shape imperfections in structural dynamics is presented, allowing for independent expansion of displacement fields and high simulation speedups. The method demonstrates improved accuracy compared to previous work by using a deformation framework and Neumann expansion in the definition of strains. Two numerical examples of a clamped beam and a MEMS gyroscope showcase the method's benefits in terms of speed and increased accuracy.
NONLINEAR DYNAMICS
(2021)
Article
Construction & Building Technology
Qiang Zhang, Wei He, Hong-Ying Wang, Ri-Cheng Liu, Meng-Meng Lu, Bin-Song Jiang
Summary: This paper presents an analytical finite strain solution for cavity expansion in strain-hardening and/or softening Mohr-Coulomb soil, considering the evolutions of material parameters. The study found that for the same cavity expansion, the required cavity pressure for strain-hardening and/or softening soils may be larger or smaller than that of elasto-perfectly plastic soils.
TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY
(2021)
Article
Engineering, Civil
Zili Zhang
Summary: This paper investigates the nonlinear behavior of tuned liquid dampers (TLDs) and its effects on vibration control effectiveness, revealing different liquid behaviors and damper types impacting the effectiveness. Tuned TMD generally outperforms tuned TLD, but when both dampers are detuned, a shallow-water TLD may outperform TMD as excitation amplitude increases, while a deep-water TLD has less amplitude-dependent performance and is more robust.
ENGINEERING STRUCTURES
(2022)
Article
Optics
A. V. Dodonov, V. V. Dodonov
Summary: The article introduces two examples where the dynamical Casimir effect is achieved by modulating the Kerr or higher-order nonlinearities, involving the coupling between the cavity field and an arbitrary number of qubits/harmonic oscillator, and accompanied by off-resonance modulation of the cavity frequency. The analytic description and numeric simulations demonstrate the creation of photons from vacuum, and the resulting hyper-Poissonian photon statistics being significantly different from the squeezed vacuum state.
Article
Engineering, Mechanical
Bimal Das, Akhilendra Singh, Puja Ghosal, Ashish Priya, R. Rohith Kumar Reddy
Summary: The study investigates the impact of hydrogen charging on the transformation induced plasticity steel during strain-controlled low cycle fatigue (LCF). Hydrogen charging negatively affects the strain-controlled LCF lives. The uncharged specimen experiences cyclic hardening due to strain-induced martensitic transformation (SIMT), while the hydrogen charged specimen exhibits cyclic softening and suppresses cyclic hardening due to the large fraction of low angle grain boundaries. Additionally, the cyclic plasticity modeling using the Ohno-Wang kinematic hardening model accurately simulates the cyclic stress-strain hysteresis loop and cyclic softening curve of both uncharged and hydrogen charged specimens.
INTERNATIONAL JOURNAL OF FATIGUE
(2023)
Article
Construction & Building Technology
Yu Rong, Huilan Ren, Xiangzhao Xu
Summary: This paper presents an improved damage-plasticity material model for concrete to predict its mechanical response under dynamic loading. The model modifies the failure strength surface based on the current extent of damage and separately defines shear, compacted, and tensile damage. It introduces a unified hardening/softening function to predict strain hardening and softening behaviors under compression, taking into consideration the Lode angle effect and strain rate effect. The feasibility and accuracy of this improved concrete model are verified through experiments and numerical simulations.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2023)
Article
Engineering, Aerospace
X. Q. Wang, Vishal Khanna, Kwangkeun Kim, Marc P. Mignolet
Summary: This study focuses on the development and validation of nonintrusive structural dynamic reduced-order models for the geometrically nonlinear response of flat cantilevered structures. The modified identification of reduced-order modeling strategies is successfully applied to flat beam and plate models under various loads.
JOURNAL OF AEROSPACE 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, Aerospace
Yufei Rong, Qin Sun, Kun Ma, Yazhou Yang, Ke Liang
Summary: In this paper, a novel method is proposed to transfer aerodynamic loads using distance-based weight functions. The method achieves optimal load transfer by adjusting the distance factor and weight functions. It shows great potential in the numerical analysis of aeroelastic behaviors for air-vehicle.
AEROSPACE SCIENCE AND TECHNOLOGY
(2022)
Article
Engineering, Aerospace
Y. J. Zhang, Renzhong Guo, Yunhui Zhang, K. Liang
Summary: This study proposes a test method for the freshwater/seawater ice adhesion shear strength of amphibious aircraft brake pads and investigates the influence of icing process, mechanism, temperature, and freshwater/seawater on ice adhesion shear strength of carbon ceramic brake pads.
AIRCRAFT ENGINEERING AND AEROSPACE TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Ke Liang, Zheng Li, Zhenghu Wang, Yongjie Zhang
Summary: This study aims to develop a ROM-driven lamination optimization to maximize the buckling and postbuckling performance of compressed plates under high temperature environment.
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
(2023)
Article
Mathematics, Interdisciplinary Applications
Yufei Rong, Feng Sun, Qin Sun, Ke Liang
Summary: In this paper, a solution framework for solid element based on co-rotational formulation is developed for geometrically nonlinear analysis. A novel eight-node solid element embedded in the framework is developed using a modified Hellinger-Reissner variational principle, and the stiffness matrix is derived by compatible displacement and the most desirable stress fields, as well as a penalty function. Additionally, an accelerated modified Newton method is proposed to improve the efficiency of the solution of nonlinear equations, and a hybrid load-controlled/arc-length algorithm is used to compute the equilibrium path of structures exhibiting instability.
COMPUTATIONAL MECHANICS
(2023)
Article
Engineering, Civil
Ke Liang, Zhenghu Wang
Summary: This paper presents a novel reduced-order modeling method for nonlinear buckling and imperfection sensitivity analyses of laminated composite cylinders subjected to axial compression. The method takes into account the effects of initial geometric imperfections and initial temperature field. The Koiter asymptotic theory is reformulated to construct a thermal-mechanical reduced-order model, which allows for evaluation of geometric imperfections and prediction of response. Numerical examples demonstrate the high efficiency and satisfactory accuracy of the proposed method, which is also applied in an optimization process.
THIN-WALLED STRUCTURES
(2023)
Article
Engineering, Aerospace
Chen Yang, Qianqian Yu
Summary: This article introduces a novel heat management and dissipation optimization method for the antenna module in space solar power satellite. By considering both design and uncertain variables, a placement and size-oriented heat dissipation optimization based on interval dimension-wise method is proposed. The interval dimension-wise method is improved by using the Legendre polynomial approximation model and the union operator of boundary points combinations, and a mapping matrix with sensitivity analysis is developed to determine the final design variables. The heat dissipation optimization is solved using the coevolutionary constrained multi-objective optimization framework, and thermophysical response intervals of the optimal heat dissipation layout can be obtained again using the interval dimension-wise method.
AEROSPACE SCIENCE AND TECHNOLOGY
(2023)
Article
Automation & Control Systems
Qianqian Yu, Chen Yang, Guangming Dai, Lei Peng, Xiaoyu Chen
Summary: This study proposes a method to determine the simultaneous placement of sensors and sinks that minimizes energy consumption and maximizes information effectiveness. A dual-population constrained multiobjective optimization (DCCMO) algorithm is developed to solve the problem. Numerical examples show that DCCMO outperforms other tested algorithms in terms of diversity, convergence, and balancing energy consumption and information effectiveness.
IEEE TRANSACTIONS ON INDUSTRIAL INFORMATICS
(2023)
Article
Materials Science, Multidisciplinary
Ke Liang, Qian Cheng
Summary: This work presents a novel design method for achieving variable thickness leading-edge wing through actively deformable honeycomb structure. The classical Gibson theory is extended to accommodate non-regular hexagonal honeycomb single-cell with positive Poisson's ratio and concave hexagonal honeycomb single-cell with negative Poisson's ratio. A deformation unit consisting of positive and negative Poisson's ratio honeycomb multi-cells is proposed, with shape memory alloy as an actuator for producing in-plane incompatible deformation that induces out-of-plane bending. The method is validated through finite element simulations of changing the leading-edge shape from blunt to sharp using a segmented two-layered honeycomb-core plate.
JOURNAL OF INTELLIGENT MATERIAL SYSTEMS AND STRUCTURES
(2023)
Article
Materials Science, Multidisciplinary
Ke Liang, Jiaqi Mu, Zheng Li, Qian Cheng, Xiaoping Zhong
Summary: This study introduces a simplified approach for dealing with the thermoelastic geometrically nonlinear response of simply-supported thin-walled structures subjected to a purely thermal load. Previous method was only applicable to the buckling problem with fixed temperature. Now, the method is reformulated to determine the critical buckling temperature from the thermoelastic geometrically nonlinear buckling analysis. The reduced-order model is constructed based on the improve Koiter theory for thermal buckling analysis of the equivalent mechanical model. The accuracy and efficiency of the proposed method for thermal buckling analysis are demonstrated using various plates and shells.
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
(2023)
Article
Engineering, Aerospace
Ke Liang, Zhen Yin
Summary: In this paper, the nonlinear buckling analysis of a wing structure is performed using the sub-modeling technique and realistic flight conditions. By considering the flight cases and applying optimization techniques, the weight of the wing structure is minimized and the stability of the structure is enhanced.
AEROSPACE SCIENCE AND TECHNOLOGY
(2023)
Article
Engineering, Aerospace
Chen Yang, Wanze Lu, Yuanqing Xia
Summary: Considering the uncertainties and disturbances in the attitude dynamics of space power satellites, a novel uncertainty-based LQR method with time-dependent reliability is proposed based on the non-probabilistic theory. An interval time-varying attitude dynamic model of the satellite is established, and controllers are designed to offset disturbances and control attitude. An interval Riccati equation-based optimal control method is proposed, and non-probabilistic time-dependent reliability is used to assess attitude states. An uncertain multi-objective optimization of attitude control with reliability constraints is proposed. The proposed method has been verified to have high efficiency and accuracy.
AEROSPACE SCIENCE AND TECHNOLOGY
(2023)
Article
Mathematics, Applied
Ke Liang, Jiaqi Mu, Zheng Li
Summary: The thermal-mechanical buckling analysis and optimization of stringer stiffened cylindrical shells are achieved using a smeared stiffener based reduced-order model. A novel reduced-order modeling method is proposed for the nonlinear buckling analysis of the stringer stiffened cylinder. The proposed method can accurately and efficiently obtain the thermoelastic geometrically nonlinear response of the cylinder and realize the optimization of the stiffening configuration at an affordable computational cost.
COMPUTERS & MATHEMATICS WITH APPLICATIONS
(2023)
Article
Engineering, Industrial
Chen Yang, Wanze Lu, Yuanqing Xia
Summary: This study proposes an uncertain optimal attitude-vibration control method for rigid-flexible coupling satellites with reliability constraints based on the interval dimension-wise analysis. The proposed method considers multi-source uncertainties and models them as interval parameters. With the help of the interval dimension-wise analysis method, the uncertain state response of the control system can be accurately predicted. An interval linear quadratic regulator (LQR) is then proposed to optimize the control input and cost function. Additionally, a non-probabilistic time-dependent reliability method is proposed to effectively evaluate the relationship between the uncertain state response and threshold.
RELIABILITY ENGINEERING & SYSTEM SAFETY
(2023)
Article
Computer Science, Hardware & Architecture
Chen Yang, Wanze Lu, Yuanqing Xia
Summary: A novel method for positioning accuracy analysis based on non-probabilistic time-dependent reliability is proposed for industrial robots with multisource uncertainties. The uncertain parameters are considered as unknown-but-bounded (UBB) to overcome the limitation of the probabilistic method in analyzing fewer samples. The proposed method accurately estimates the interval transformation matrix of robots and the uncertain position of the end-effectors using the D-H method, and investigates the positioning accuracy analysis method using the Delaunay triangulation method combined with the interval method.
IEEE TRANSACTIONS ON RELIABILITY
(2023)
Article
Automation & Control Systems
Wanze Lu, Chen Yang, Yuanqing Xia
Summary: This study proposes an interval optimal impedance control method for the electric power steering-human system with reliability constraints. A position-based impedance control model is developed for the integrated EPS-H system. Polynomial chaos expansion is employed to establish the interval state-space equation and obtain bounded responses. The influence of uncertain parameters is analyzed, and a non-probabilistic time-varying reliability method is proposed.
CONTROL ENGINEERING PRACTICE
(2024)
Article
Engineering, Aerospace
Andre F. P. Ribeiro, Carlos Ferreira, Damiano Casalino
Summary: This study compares a filament-based free wake panel method to experimental and validated numerical data in order to simulate propeller slipstreams and their interaction with aircraft components. The results show that the free wake panel method is able to successfully capture the slipstream deformation and shearing, making it a useful tool for propeller-wing interaction in preliminary aircraft design.
AEROSPACE SCIENCE AND TECHNOLOGY
(2024)
