Applied Mathematical Modelling最新文献_第2页

Improving vibration suppression by applying stochastic optimization to a coil-contained vibro-impact nonlinear energy sink within a linear oscillator framework 采用随机优化方法改善线性振子框架内含振冲非线性能量阱的减振效果

IF 4.4 2区工程技术

Applied Mathematical Modelling Pub Date : 2025-09-27 DOI: 10.1016/j.apm.2025.116479

Ali Abdollahi , Saeed Bab

{"title":"Improving vibration suppression by applying stochastic optimization to a coil-contained vibro-impact nonlinear energy sink within a linear oscillator framework","authors":"Ali Abdollahi , Saeed Bab","doi":"10.1016/j.apm.2025.116479","DOIUrl":"10.1016/j.apm.2025.116479","url":null,"abstract":"<div><div>This study investigates a coupled system consisting of a linear oscillator (LO) with a damper and spring, interacting with a Vibro Impact Nonlinear Energy Sink (VI-NES) enclosed by a coil. Inside the LO, a ball moves within a cavity, colliding with its boundaries. The research optimizes key parameters- cavity length, restitution coefficient, and coil characteristics -using a Genetic Algorithm (GA). It derives motion equations incorporating electromagnetic and collision forces while assessing an energy-harvesting circuit that converts mechanical vibrations into electrical energy via a load resistance connected to the coil. The analysis highlights transitions in system behavior, ranging from regular to chaotic under certain conditions. Efficiency metrics evaluate the VI-NES effectiveness in energy absorption and dissipation. The optimization method accounts for initial condition variations and introduces an approach to manage uncertainties. Moreover, a multi-objective optimization framework is introduced using the Pareto front approach, defining two objectives: minimizing the vibrational energy of the system and maximizing the electrical energy generated by the coil. Comparing results with prior studies confirms the reliability of this technique, demonstrating that GA optimization significantly reduces LO amplitude response, surpassing approximate methods.</div></div>","PeriodicalId":50980,"journal":{"name":"Applied Mathematical Modelling","volume":"151 ","pages":"Article 116479"},"PeriodicalIF":4.4,"publicationDate":"2025-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145222050","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

Improved analytical model of gear mesh stiffness considering free end effect and contact gap variation 考虑自由端效应和接触间隙变化的齿轮啮合刚度改进分析模型

IF 4.4 2区工程技术

Applied Mathematical Modelling Pub Date : 2025-09-27 DOI: 10.1016/j.apm.2025.116460

Feifei Li, Hongkun Li, Jingyu Zhai, Mingyang Yuan, Bin Sun, Zhaorong Dong

{"title":"Improved analytical model of gear mesh stiffness considering free end effect and contact gap variation","authors":"Feifei Li, Hongkun Li, Jingyu Zhai, Mingyang Yuan, Bin Sun, Zhaorong Dong","doi":"10.1016/j.apm.2025.116460","DOIUrl":"10.1016/j.apm.2025.116460","url":null,"abstract":"<div><div>In gear systems, mesh stiffness is regarded as a significant internal excitation with critical influences on the gear dynamics. The existing analytical model for mesh stiffness calculation determines contact stiffness without accounting for stress concentration at the free end, and it neglects variations in the contacting gap when establishing the meshing interval for single and double teeth, resulting in calculation inaccuracies. This paper proposes an analytical method(AM) to achieve highly efficient and precise calculations by considering free end effect and contact gap variation. The method developed correction coefficients using the elastic quarter-space quick correction method, based on Hertz contact theory, half-space theory, and minimum potential energy principle. Hertz contact theory and half-space theory can precisely compute the local contact deformation at the midpoint of tooth width. The elastic quarter-space fast correction method effectively accounts for the free end effect in finite-length space, enabling accurate calculation of local contact stiffness. A mesh stiffness calculation model is built based on the method recommended, considering gear body structure coupling effect and elastic contact gap variation. The precision and efficiency of the proposed method(PM) are verified by finite element method (FEM) benchmarks and existing common methods.</div></div>","PeriodicalId":50980,"journal":{"name":"Applied Mathematical Modelling","volume":"151 ","pages":"Article 116460"},"PeriodicalIF":4.4,"publicationDate":"2025-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145222051","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

Distributed curvature control of a continuum arm with intermittently attached cables 带断续连接索连续臂的分布曲率控制

IF 4.4 2区工程技术

Applied Mathematical Modelling Pub Date : 2025-09-26 DOI: 10.1016/j.apm.2025.116461

Zhiji Han , Hongdu Wang , Donghao Zhang , Zhijie Liu

引用次数: 0

Evolutionary dynamics of information diffusion with sending-receiving interactions 具有发送-接收交互作用的信息扩散演化动力学

IF 4.4 2区工程技术

Applied Mathematical Modelling Pub Date : 2025-09-26 DOI: 10.1016/j.apm.2025.116457

Zhifang Li, Yikai Wang, Chenxin Ge, Xiaojie Chen

{"title":"Evolutionary dynamics of information diffusion with sending-receiving interactions","authors":"Zhifang Li, Yikai Wang, Chenxin Ge, Xiaojie Chen","doi":"10.1016/j.apm.2025.116457","DOIUrl":"10.1016/j.apm.2025.116457","url":null,"abstract":"<div><div>In this paper, we systematically investigate the evolutionary dynamics of information diffusion with sending and receiving interactions in both well-mixed and structured populations. We propose an evolutionary game-theoretical model that captures the dual roles of individuals as both senders and receivers, examining not only the strategies of individuals as senders (to send or not to send) but also their strategies as receivers (to accept or deny). By using replicator dynamics, we find that there exists a stable coexistence state between the strategies of “not sending-accepting” and “not sending-denying” in well-mixed populations, with the “sending-accepting” strategy failing to emerge. Furthermore, we theoretically demonstrate that the stable coexistence state is robust against parameter variations. However, in structured populations, we derive a critical mathematical condition under which the emergence of the “sending-accepting” strategy is promoted. This finding highlights the importance of population structure in facilitating efficient information dissemination. Besides, to validate our theoretical results, we conduct computer simulations. All simulation outcomes are in agreement with the theoretical predictions.</div></div>","PeriodicalId":50980,"journal":{"name":"Applied Mathematical Modelling","volume":"151 ","pages":"Article 116457"},"PeriodicalIF":4.4,"publicationDate":"2025-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145268127","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

Data-driven diffusion generative design of energy-absorbing metamaterials using implicit surface representation 使用隐式表面表示的吸能超材料的数据驱动扩散生成设计

IF 4.4 2区工程技术

Applied Mathematical Modelling Pub Date : 2025-09-26 DOI: 10.1016/j.apm.2025.116467

Haoyu Wang , Haisen Xu , Hanlin Xiao , Shan Tang

{"title":"Data-driven diffusion generative design of energy-absorbing metamaterials using implicit surface representation","authors":"Haoyu Wang , Haisen Xu , Hanlin Xiao , Shan Tang","doi":"10.1016/j.apm.2025.116467","DOIUrl":"10.1016/j.apm.2025.116467","url":null,"abstract":"<div><div>Currently, the design of energy-absorbing materials and structures primarily relies on empirical or heuristic methods. Motivated by advances in generative artificial intelligence techniques, a data-driven diffusion generative approach using implicit surface representation for energy-absorbing metamaterial design is proposed. This approach utilizes the diffusion model to learn the conditional distribution of metamaterial based on specified mechanical properties, converting target properties into potential metamaterial topologies. Additionally, level set-based implicit surface representation ensures that the generated metamaterials have high-quality geometric shapes and clear boundary definitions, enhancing design flexibility while requiring fewer design variables. Numerical simulations and experimental results consistently verify that the proposed approach enables rapid and accurate design of metamaterials tailored to target mechanical performance. This method offers an innovative and efficient solution for the accelerated design of energy-absorbing metamaterials, providing a new perspective and approach to address complex engineering design challenges.</div></div>","PeriodicalId":50980,"journal":{"name":"Applied Mathematical Modelling","volume":"151 ","pages":"Article 116467"},"PeriodicalIF":4.4,"publicationDate":"2025-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145222111","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

Structural properties of multi-period martingale optimal transport problems and applications 多周期鞅最优输运问题的结构性质及其应用

IF 4.4 2区工程技术

Applied Mathematical Modelling Pub Date : 2025-09-25 DOI: 10.1016/j.apm.2025.116466

Brendan Pass, Joshua Hiew

引用次数: 0

A non-intrusive data-driven approach towards a solution of the inverse problem of bending dielectric elastomer actuators 一种非侵入式数据驱动方法求解弯曲介质弹性体作动器逆问题

IF 4.4 2区工程技术

Applied Mathematical Modelling Pub Date : 2025-09-25 DOI: 10.1016/j.apm.2025.116468

Max Barillas , Rogelio Ortigosa , Jesus Martinez-Frutos , Javier Bonet , Alberto García-González

{"title":"A non-intrusive data-driven approach towards a solution of the inverse problem of bending dielectric elastomer actuators","authors":"Max Barillas , Rogelio Ortigosa , Jesus Martinez-Frutos , Javier Bonet , Alberto García-González","doi":"10.1016/j.apm.2025.116468","DOIUrl":"10.1016/j.apm.2025.116468","url":null,"abstract":"<div><div>Dielectric Elastomer Actuators (DEAs), particularly bending DEAs, have gained significant attention due to their applications in soft robotics, biomimetic systems, and adaptive structures. Recent advancements in computational mechanics and the finite element method (FEM) have enabled accurate simulations of these actuators by incorporating their nonlinear mechanical behavior at large deformations and the coupling between mechanical and electrical responses. However, DEA design often involves solving inverse problems, which become computationally expensive when relying solely on direct simulations. To mitigate this cost, a fast surrogate model is needed. This study proposes a Reduced Order Model (ROM)-based methodology to efficiently determine the optimal locations and magnitudes of applied external potentials in a bending DEA to achieve a desired displacement response. The approach leverages nonlinear dimensionality reduction techniques, specifically Kernel Principal Component Analysis (kPCA) and Isometric Mapping (Isomap), to construct a surrogate model that accurately predicts DEA displacement responses from existing data without modifying the underlying FEM formulation. Using this surrogate model, the inverse problem is solved efficiently, achieving high accuracy (<2 % error) while significantly reducing computational cost. The methodology is validated on two different bending DEA geometries, demonstrating its effectiveness in both surrogate modeling and time-efficient inverse problem solving.</div></div>","PeriodicalId":50980,"journal":{"name":"Applied Mathematical Modelling","volume":"151 ","pages":"Article 116468"},"PeriodicalIF":4.4,"publicationDate":"2025-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145222109","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

Visual positioning-based microscopic wear failure probability analysis of wet friction component 基于视觉定位的湿摩擦件微观磨损失效概率分析

IF 4.4 2区工程技术

Applied Mathematical Modelling Pub Date : 2025-09-24 DOI: 10.1016/j.apm.2025.116475

Jianpeng Wu , Ao Ding , Wenya Shu , Heyan Li , Liyong Wang , Shuai Han

{"title":"Visual positioning-based microscopic wear failure probability analysis of wet friction component","authors":"Jianpeng Wu , Ao Ding , Wenya Shu , Heyan Li , Liyong Wang , Shuai Han","doi":"10.1016/j.apm.2025.116475","DOIUrl":"10.1016/j.apm.2025.116475","url":null,"abstract":"<div><div>The wet friction component, as a crucial part of the power transmission system in mechanical equipment, plays an essential role in ensuring the safety and stability of the equipment’s operation. Consequently, its wear failure directly impacts the power transmission, making the study of its microscopic wear failure significant. This study designs a disc-to-disc test and utilises a white light interferometer to scan the interfacial morphology of the friction component. To facilitate this process, the method employs a visual algorithm to precisely locate the scanned area, allowing for the extraction of microscopic failure characteristics of the friction component. In addition, the study constructs the probability density function of the failure parameters using a kernel density estimator, incorporates it into the limit state function, and applies Monte Carlo simulations to evaluate the microscopic failure probability of the friction component. The results indicate that the visual algorithm can accurately locate the overlapping area of the friction component before and after the test, and the failure probability statistical model can precisely calculate the microscopic failure probability of the friction component.</div></div>","PeriodicalId":50980,"journal":{"name":"Applied Mathematical Modelling","volume":"151 ","pages":"Article 116475"},"PeriodicalIF":4.4,"publicationDate":"2025-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145222127","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

New drag force model for dam-break flows through vegetation under non-hydrostatic conditions and its comparison with high-resolution, fully-resolved model 非水静力条件下溃坝水流穿过植被的新阻力模型及其与高分辨率全分辨模型的比较

IF 4.4 2区工程技术

Applied Mathematical Modelling Pub Date : 2025-09-24 DOI: 10.1016/j.apm.2025.116458

Bobby Minola Ginting , Adel A. Mahmoud , Tatsuhiko Uchida

{"title":"New drag force model for dam-break flows through vegetation under non-hydrostatic conditions and its comparison with high-resolution, fully-resolved model","authors":"Bobby Minola Ginting , Adel A. Mahmoud , Tatsuhiko Uchida","doi":"10.1016/j.apm.2025.116458","DOIUrl":"10.1016/j.apm.2025.116458","url":null,"abstract":"<div><div>The effects of vegetation on dam-break flows have been studied only occasionally, often using the conventional drag force formula, which is inadequate for modeling non-uniform flows around emergent obstacles. Therefore, further investigation into drag force formulations is crucial. This study validates numerical simulations against experimental data of dam-break flows through emergent vegetation. In the laboratory, vegetation was modeled as emergent cylinders with various configurations under different initial Froude numbers. Two types of numerical simulations were conducted: (1) fully-resolved modeling using fine-resolution meshes to treat cylinders as wall boundaries, and (2) modeling cylinders as a density value in the drag force formulation. The latter approach introduced a novel drag force formula for non-equilibrium conditions, considering the base drag force component, water surface variations, and pressure gradient, integrated into a semi-implicit computation with the bed friction term evaluated using the Manning formula. Using coarser meshes than the fully-resolved modeling, the proposed approach proved appropriate for quantifying drag force with relatively small errors of less than 10 % against experimental data, while being approximately 690 times less computationally demanding. All non-hydrostatic simulations incurred computational costs up to three times greater than those computed under the hydrostatic assumption alone.</div></div>","PeriodicalId":50980,"journal":{"name":"Applied Mathematical Modelling","volume":"150 ","pages":"Article 116458"},"PeriodicalIF":4.4,"publicationDate":"2025-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145265847","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

Surface effect on frictional contact of piezoelectric material 压电材料摩擦接触的表面效应

IF 4.4 2区工程技术

Applied Mathematical Modelling Pub Date : 2025-09-24 DOI: 10.1016/j.apm.2025.116456

Zhanzhou Ma, Tiejun Liu

引用次数: 0