Applied Mathematical Modelling最新文献_第3页

Sliding adhesive contact of one-dimensional hexagonal piezoelectric quasicrystals on imperfect interface substrates 一维六边形压电准晶体在非完美界面基板上的滑动黏着接触

IF 4.4 2区工程技术

Applied Mathematical Modelling Pub Date : 2025-09-24 DOI: 10.1016/j.apm.2025.116470

Yapeng Duan , Jiale Du , Xin Zhang , Rukai Huang

引用次数: 0

Deep Gaussian Process model and its application in active learning reliability analysis 深度高斯过程模型及其在主动学习可靠性分析中的应用

IF 4.4 2区工程技术

Applied Mathematical Modelling Pub Date : 2025-09-24 DOI: 10.1016/j.apm.2025.116477

Yuan Lu , Yuxin Liu , Hong-Zhong Huang , Yan-Feng Li , Zhe Deng

引用次数: 0

Fault-tolerant control of actuator failure combinations in quad-tilt rotor UAVs 四倾旋翼无人机致动器故障组合容错控制

IF 4.4 2区工程技术

Applied Mathematical Modelling Pub Date : 2025-09-24 DOI: 10.1016/j.apm.2025.116465

Dongwoo Seo, Jaeyoung Kang

引用次数: 0

Forecasting new energy vehicle sales with grey model incorporating impact of policies 结合政策影响的灰色模型预测新能源汽车销量

IF 4.4 2区工程技术

Applied Mathematical Modelling Pub Date : 2025-09-23 DOI: 10.1016/j.apm.2025.116462

Junjie Wang, Xiaoyu Ding, Yimeng An, Yaoguo Dang

引用次数: 0

Analytical normalized stress invariant-based yield function to model anisotropic-strength differential effect 基于解析归一化应力不变量的屈服函数来模拟各向异性强度微分效应

IF 4.4 2区工程技术

Applied Mathematical Modelling Pub Date : 2025-09-23 DOI: 10.1016/j.apm.2025.116469

Pengfei Wu , Yanshan Lou

{"title":"Analytical normalized stress invariant-based yield function to model anisotropic-strength differential effect","authors":"Pengfei Wu , Yanshan Lou","doi":"10.1016/j.apm.2025.116469","DOIUrl":"10.1016/j.apm.2025.116469","url":null,"abstract":"<div><div>Uncovering and characterizing the direction- and stress state-dependent material behavior is very critical and significant to the simulation and design of the metal forming process. The study establishes an analytical model based on a normalized stress invariant-based yield function, where these material parameters are computed by six hardening curves under different loading conditions. The analytical model is used to describe the material behavior of DP980 and AA5754-O, showing the characterization ability prior to the Hou2020 yield function under plane strain tension and shear. The initial yield behavior of WE43 alloy is with the isotropic characteristic, and the strength declines when the loading direction is from 0° to 45° while that increases from 45° to 90°. This indicates that the hardening behavior possesses the enhanced anisotropic property with deformation history. The mechanical strength varies with stress state, showing a clear strength differential effect dependent on loading stroke. The convexity of the yield surface is analyzed to determine the numerical strain domain through adopting a newly proposed geometry-inspired numerical approach. The anisotropic-strength differential hardening behavior of WE43 alloy is modeled with high accuracy by the proposed analytical model, and the yield locus presents a non-proportional evolving characteristic with strain. The research provides an analytical mathematical model, which is conducive to plasticity characterization and the analysis of the metal forming process considering the anisotropic-strength differential hardening behavior.</div></div>","PeriodicalId":50980,"journal":{"name":"Applied Mathematical Modelling","volume":"151 ","pages":"Article 116469"},"PeriodicalIF":4.4,"publicationDate":"2025-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145268129","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Langevin approach to modeling of electron acceleration by Langmuir turbulence in ionosphere 电离层中Langmuir湍流电子加速的Langevin建模方法

IF 4.4 2区工程技术

Applied Mathematical Modelling Pub Date : 2025-09-23 DOI: 10.1016/j.apm.2025.116455

Zhijian Lu , Hui Li , Nurken E. Aktaev , Zhongxiang Zhou , Dewei Gong , A.A. Kudryavtsev , Chengxun Yuan

{"title":"Langevin approach to modeling of electron acceleration by Langmuir turbulence in ionosphere","authors":"Zhijian Lu , Hui Li , Nurken E. Aktaev , Zhongxiang Zhou , Dewei Gong , A.A. Kudryavtsev , Chengxun Yuan","doi":"10.1016/j.apm.2025.116455","DOIUrl":"10.1016/j.apm.2025.116455","url":null,"abstract":"<div><div>A stochastic Langevin differential equation approach is proposed to model electron motion in collisionless ionospheric plasma within regions of Langmuir turbulence driven by a powerful wave. The model attributes electron motion to interactions with a broad wave packet excited by this incident wave. The primary mechanisms initiating motion are velocity-space diffusion, characterized by an inhomogeneous alternating electric field, and Landau damping. This paper outlines the model construction principles and analyzes key aspects, including the hierarchy of relaxation timescales, the selection of the simulation time step, the fulfillment of conditions for a broad wave packet, and the stochastic nature of electron-wave interactions (modeled as jumps). Implementation features of the numerical model are also discussed. The model's adequacy is demonstrated by comparing numerical results with those obtained from the widely used Gurevich model for high-energy electrons. Crucially, the proposed approach successfully describes the dynamics across the entire electron distribution, including the bulk population, rather than only the high-energy tail.</div></div>","PeriodicalId":50980,"journal":{"name":"Applied Mathematical Modelling","volume":"151 ","pages":"Article 116455"},"PeriodicalIF":4.4,"publicationDate":"2025-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145222048","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Rub-impact investigation on the lateral-torsional coupled vibration of a bolted joint rotor system with interface contact 具有界面接触的螺栓连接转子系统横扭耦合振动的碰摩研究

IF 4.4 2区工程技术

Applied Mathematical Modelling Pub Date : 2025-09-23 DOI: 10.1016/j.apm.2025.116459

Bo Yang , Yuqi Li , Chuanmei Wen , Lei Li , Bing Li , Wenting Song

{"title":"Rub-impact investigation on the lateral-torsional coupled vibration of a bolted joint rotor system with interface contact","authors":"Bo Yang , Yuqi Li , Chuanmei Wen , Lei Li , Bing Li , Wenting Song","doi":"10.1016/j.apm.2025.116459","DOIUrl":"10.1016/j.apm.2025.116459","url":null,"abstract":"<div><div>Under speed-up conditions, the monotonically increasing load significantly affects the contact state of bolted joint interfaces, potentially exacerbating rubbing faults. Therefore, a numerical model is developed based on static simulations and the Iwan model. The proposed model's capability in capturing the interface contact state is confirmed through a comparison of static and dynamic responses. Subsequently, a coupled lateral-torsional vibration model for the bolted joint rotor system considering rubbing faults is developed by combining the lumped-mass method with the Stribeck model. Numerical results indicate that rubbing faults intensify interface contact variations, reducing the system’s equivalent stiffness. Moreover, during acceleration, the additional imbalance force induced by speed-up further exacerbates interface contact variations, resulting in more pronounced stiffness softening. Finally, experimental testing validates the effectiveness of the numerical simulation results. This study provides valuable theoretical guidance for rotor system structural design and fault diagnosis.</div></div>","PeriodicalId":50980,"journal":{"name":"Applied Mathematical Modelling","volume":"151 ","pages":"Article 116459"},"PeriodicalIF":4.4,"publicationDate":"2025-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145182924","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Dynamic response analysis of pile-soil interaction during pile driving by torsional vibration 扭转振动桩入桩过程中桩土相互作用动力响应分析

IF 4.4 2区工程技术

Applied Mathematical Modelling Pub Date : 2025-09-23 DOI: 10.1016/j.apm.2025.116464

Yudong Peng, Xueliang Zhang, Xu Shi, Mengjiao Duan

{"title":"Dynamic response analysis of pile-soil interaction during pile driving by torsional vibration","authors":"Yudong Peng, Xueliang Zhang, Xu Shi, Mengjiao Duan","doi":"10.1016/j.apm.2025.116464","DOIUrl":"10.1016/j.apm.2025.116464","url":null,"abstract":"<div><div>This paper presents a precise theoretical model for pile-soil interaction during torsional vibration piling, offering an effective method for analyzing the response characteristics of pile-soil coupling throughout the pile driving process. In this analysis, the torsional dynamic response of a pipe pile in a linear elastic soil subjected to harmonic torsional load is investigated. Firstly, a vibration hammer-pile-soil torsional vibration piling system is developed to investigate the torsional vibration behavior under friction-coupled conditions by considering the fixed connection between the vibration hammer and the top of the pile, as well as the coupling characteristics between the bottom of the pile and the soil. Based on the separation of variables method and a 1D elastic theory, the torsional vibration differential equations of the pile are established and solved to research the torsional response and shear stress of the pile by considering frictional resistance between the pile and the soil. Secondly, a parametric study is conducted to examine the influence of soil parameters on the vibration responses. The soil is modeled as a linear elastic medium, and the response of soil is analyzed under the torsional vibration. The Integral Transform Method is employed to convert the soil vector wave equation from the space-time domain to the frequency-wavenumber domain. The response of the soil under torque is determined using Green’s functions. Finally, the comparison of theoretical and simulation results confirms the validity and accuracy of the pile-soil coupling model during pile driving through torsional vibration, based on the analysis of both pile and soil.</div></div>","PeriodicalId":50980,"journal":{"name":"Applied Mathematical Modelling","volume":"151 ","pages":"Article 116464"},"PeriodicalIF":4.4,"publicationDate":"2025-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145222049","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Neural grey system model based on generalized conformable fractional derivatives and its applications 基于广义适形分数阶导数的神经灰色系统模型及其应用

IF 4.4 2区工程技术

Applied Mathematical Modelling Pub Date : 2025-09-20 DOI: 10.1016/j.apm.2025.116420

Wanli Xie , Ying Wei , Hong Fu

{"title":"Neural grey system model based on generalized conformable fractional derivatives and its applications","authors":"Wanli Xie , Ying Wei , Hong Fu","doi":"10.1016/j.apm.2025.116420","DOIUrl":"10.1016/j.apm.2025.116420","url":null,"abstract":"<div><div>Accurately forecasting the evolution of complex systems with scant observational data demands models that reconcile long-range memory effects with expressive nonlinear mappings. In this study, we introduce a rigorously formulated fractional-order calculus framework-together with its discrete analogue-that enables continuously tunable differentiation orders and thus a refined representation of hereditary dynamics. Building on this theoretical advance, we derive a fractional grey prediction model whose fractional accumulation operator and discrete fractional differential equation extend the descriptive reach of classical grey theory. We further embed this model in a neural architecture by employing Chebyshev-polynomial activation functions, whose orthogonality accelerates functional approximation, and by estimating all parameters through a closed-form least-squares scheme, thereby preserving analytical transparency. Applied to real-world time-series forecasting problems, the resulting neural fractional grey system consistently attains lower forecasting errors than both conventional grey models and standard feed-forward neural networks, underscoring the complementary strengths of fractional calculus, grey-system parsimony, and neural nonlinearity. The proposed framework offers a transferable methodology for robust prediction under data scarcity and enriches the methodological arsenal available for energy, economic, and other application domains characterized by limited yet highly uncertain observations.</div></div>","PeriodicalId":50980,"journal":{"name":"Applied Mathematical Modelling","volume":"151 ","pages":"Article 116420"},"PeriodicalIF":4.4,"publicationDate":"2025-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145221993","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Global dynamics and multistability control of heated panel in supersonic flow 加热板在超音速流动中的全局动力学及多稳定控制

IF 4.4 2区工程技术

Applied Mathematical Modelling Pub Date : 2025-09-20 DOI: 10.1016/j.apm.2025.116454

Xiaole Yue , Huikang Zhang , Xiaoyan Sun , Yong Xu

{"title":"Global dynamics and multistability control of heated panel in supersonic flow","authors":"Xiaole Yue , Huikang Zhang , Xiaoyan Sun , Yong Xu","doi":"10.1016/j.apm.2025.116454","DOIUrl":"10.1016/j.apm.2025.116454","url":null,"abstract":"<div><div>This study investigates the global dynamics of a heated, simply supported panel in supersonic flow with structural nonlinearity and support motion. The governing equations, derived using von Kármán’s large deflection theory and first-order piston theory, are discretized into ordinary differential equations via Galerkin’s method. Using the composite cell coordinate cystem (CCCS) method for global analysis, we identify that variations in excitation amplitude and thermal stress trigger three critical transitions: boundary, interior, and merging crises, inducing multistability with interlaced basins of attraction. The multistability property increases the system’s sensitivity to perturbations, threatening the panel’s safe service. To address this, we first established a mapping between excitation parameters and the number of coexisting attractors, and then presented a control strategy. Numerical simulation results show that the strategy successfully eliminates coexisting attractors and can even convert chaotic motion into periodic orbits. Our findings provide novel insights into the nonlinear dynamics of panels in supersonic flow and establish a theoretical basis for the control of multistability.</div></div>","PeriodicalId":50980,"journal":{"name":"Applied Mathematical Modelling","volume":"151 ","pages":"Article 116454"},"PeriodicalIF":4.4,"publicationDate":"2025-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145221991","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0