International Journal of Structural Stability and Dynamics最新文献_第8页

Theoretical and Experimental Research on the Influence and Optimization Method of the 60N Profile in Turnout 60N型道岔影响及优化方法的理论与实验研究

3区工程技术

International Journal of Structural Stability and Dynamics Pub Date : 2023-10-14 DOI: 10.1142/s0219455424501475

Wang Pu, An Bolun, Ma Junqi, Wang Shuguo, Liu Fengshou

{"title":"Theoretical and Experimental Research on the Influence and Optimization Method of the 60N Profile in Turnout","authors":"Wang Pu, An Bolun, Ma Junqi, Wang Shuguo, Liu Fengshou","doi":"10.1142/s0219455424501475","DOIUrl":"https://doi.org/10.1142/s0219455424501475","url":null,"abstract":"This research elucidates the influence of the 60N rail profile on the dynamic interaction between wheel and rail, and the dynamic performance within the turnout. The influence of the 60N profile on the long-term service efficiency of turnouts was scrutinized. Subsequently, an optimization approach for the 60–60N rail combination profile was suggested. The main conclusions are as follows: (1) During the passage in the main direction, the 60N rail profile enhances driving stability and mitigates the progression of wear. However, it causes focalized wheel–rail contact on the rail head and escalates contact stress. (2) During the passage in the branch direction, the 60N rail profile amplifies the lateral dynamic force and rail wear rate in the closure panel, engendering two-point contact and increased contact stress. (3) In the early stage of field service of turnouts, a robust correlation exists between the contact band and the rail profile. In the fragile cross-section of the point rail, the contact band of the 60N rail profile turnout fully occupies the rail head, potentially causing stress concentration on the non-working edge position. By the stable service period, the wheel–rail contact band is mainly influenced by total weight. (4) An optimization method for the 60–60N combination profile was proposed with the corresponding machining tool profile designed. This strategy can avoid the profile transition before and after the turnout, reduce field maintenance workload, enhance running stability of straight passage through the turnout, and preclude fatigue damage in the weak cross-sections of the point rail.","PeriodicalId":54939,"journal":{"name":"International Journal of Structural Stability and Dynamics","volume":"129 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135767371","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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 characteristics of a supercritical helicopter tail transmission system with self-excited vibration and rubbing impact 具有自激振动和摩擦冲击的超临界直升机尾翼传动系统动态特性

3区工程技术

International Journal of Structural Stability and Dynamics Pub Date : 2023-10-13 DOI: 10.1142/s0219455424501888

Haimin Zhu, Shunan Hu, Li Zhang, Miaomiao Li, Rupeng Zhu

引用次数: 0

Adaptive Excitation Frequency Matching and Acoustic-Feature-Based Automatic Hammering Inspection System 自适应激励频率匹配及基于声特征的自动锤击检测系统

3区工程技术

International Journal of Structural Stability and Dynamics Pub Date : 2023-10-13 DOI: 10.1142/s0219455423400382

Huang Huang, Xi Huang, Zhishen Wu, Mohamad Najib Alhebrawi, Zhishui Liang

引用次数: 0

Neural Network-based Anomaly Data Classification and Localization in Bridge Structural Health Monitoring 基于神经网络的桥梁结构健康监测异常数据分类与定位

3区工程技术

International Journal of Structural Stability and Dynamics Pub Date : 2023-10-13 DOI: 10.1142/s0219455424501840

Yahao Li, Nan Zhang, Qikan Sun, Chaoxun Cai, Kebing Li

引用次数: 0

Dynamic responses and nonlinear characteristics of a nonlinear absorber with Euler-buckled beams for spacecraft flywheel systems 航天器飞轮系统欧拉屈曲梁非线性吸收器的动力响应和非线性特性

3区工程技术

International Journal of Structural Stability and Dynamics Pub Date : 2023-10-13 DOI: 10.1142/s021945542450189x

Jun Zhang, Haiping Liu, Dashan Shen, Chunri Quan

引用次数: 0

Dynamic responses of a shallow lined tunnel with imperfect interface under transient P wave 瞬态P波作用下界面不完善浅埋衬砌隧道的动力响应

3区工程技术

International Journal of Structural Stability and Dynamics Pub Date : 2023-10-13 DOI: 10.1142/s0219455424501876

Yuanyou Xia, Gaoshen Han, Wanquan Mei, Peng-Zhi Pan, Mei Li, Minjia Yan, Yaofeng Yan

引用次数: 0

The moving element method for the dynamic responses of floating double-plate structures on the shallow water 浅水浮式双板结构动力响应的运动单元法

3区工程技术

International Journal of Structural Stability and Dynamics Pub Date : 2023-10-13 DOI: 10.1142/s0219455424501852

Van Hai Luong, Ngoc Thuan Do

引用次数: 0

Interfacial Debonding Detection in Concrete-Filled Steel Tubular (CFST) Columns with Modal Curvature-Based Irregularity Detection Indices 基于模态曲率不规则检测指标的钢管混凝土柱界面剥离检测

3区工程技术

International Journal of Structural Stability and Dynamics Pub Date : 2023-10-12 DOI: 10.1142/s0219455424501487

Mohtasham Khanahmadi, Masoud Khalighi

{"title":"Interfacial Debonding Detection in Concrete-Filled Steel Tubular (CFST) Columns with Modal Curvature-Based Irregularity Detection Indices","authors":"Mohtasham Khanahmadi, Masoud Khalighi","doi":"10.1142/s0219455424501487","DOIUrl":"https://doi.org/10.1142/s0219455424501487","url":null,"abstract":"This study investigates the effect of concrete-steel debonding on the modal dynamic properties, i.e. frequency values and vibration mode shapes, and deals with the identification of interfacial debonding zones in CFST columns. In this context, debonding, defined as a decrease in concrete stiffness at the connection with the steel tube by a depth of 3 mm, was analyzed through the frequency analysis of the column. The findings indicate that debonding results in a discernible disparity between the primary and secondary mode shapes, as assessed by the Modal Assurance Criterion (MAC). Furthermore, there is a reduction in the frequency values across all modes. This paper proposes the irregularity detection indices of the Modal Curvature Index (MCI), Modal Curvature-Slope Index (MCSI) and Modal Curvature-Curvature Index (MCCI) using the concept of curvature to detect the debonding zones. These indices indicate the relative extreme values of irregularities in debonding zones for all modes, such that the MCSI and MCCI show an increase in the height of irregularities regardless of negative or positive signs in a debonding zone as the damage severity in that zone increases.","PeriodicalId":54939,"journal":{"name":"International Journal of Structural Stability and Dynamics","volume":"81 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135923905","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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: 1

Component Mode Synthesis Based on the Energy Method for Frequency Domain Dynamic Response Analysis of Ballastless Track Structure 基于能量法的无砟轨道结构频域动力响应分析模态综合

3区工程技术

International Journal of Structural Stability and Dynamics Pub Date : 2023-10-12 DOI: 10.1142/s0219455424501438

Zhou Yang, Qingsong Feng, Gong Cheng, Ling Zhang

{"title":"Component Mode Synthesis Based on the Energy Method for Frequency Domain Dynamic Response Analysis of Ballastless Track Structure","authors":"Zhou Yang, Qingsong Feng, Gong Cheng, Ling Zhang","doi":"10.1142/s0219455424501438","DOIUrl":"https://doi.org/10.1142/s0219455424501438","url":null,"abstract":"Used extensively in structural dynamics analysis, the energy method is advantageous for transforming boundary value problems of differential equations into variational extremum problems. Recent applications include analyzing the wave and vibration characteristics of track structures. However, traditional energy methods for dynamic modeling and analysis of ballastless track structures require obtaining the global stiffness matrix and mass matrix of the entire coupled system, which decreases computational efficiency. The EM-CMS algorithm for frequency domain dynamic response analysis of ballastless track structures has been proposed to address this issue. The core of EM-CMS is the development of model reduction strategies within the framework of the energy method to reduce matrix dimensions and thereby improve computational efficiency. Specifically, the steel spring floating slab track is the focus of this research. Utilizing the energy functional variational method, the modal properties of the rail and floating slab structures are obtained, and truncation is performed. A reduced-order model for the steel spring floating slab track is established by considering the boundary conditions between the rail-floating slab and the floating slab foundation (connected through fastener springs and steel springs, respectively, and considering the springs’ elastic potential energy). Comparatively, the computational efficiency of EM-CMS is approximately ten times greater than that of the energy method. The method’s accuracy is also carefully validated against finite element simulations.","PeriodicalId":54939,"journal":{"name":"International Journal of Structural Stability and Dynamics","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135923904","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Study on the effect of different sandwich thicknesses on the impact resistance of laminated glass 不同夹层厚度对夹层玻璃抗冲击性能影响的研究

3区工程技术

International Journal of Structural Stability and Dynamics Pub Date : 2023-10-12 DOI: 10.1142/s0219455424501530

Youning Zhang, Xiangrui Wei, Qian Wang, Jingjing He, Yunkuan Zhang, Xiang Wang

{"title":"Study on the effect of different sandwich thicknesses on the impact resistance of laminated glass","authors":"Youning Zhang, Xiangrui Wei, Qian Wang, Jingjing He, Yunkuan Zhang, Xiang Wang","doi":"10.1142/s0219455424501530","DOIUrl":"https://doi.org/10.1142/s0219455424501530","url":null,"abstract":"Polyvinyl butyral (PVB) laminated glass is widely used in architectural structures and automotive glass due to its remarkable cushioning and cohesive properties, and its lamination thickness has a significant effect on the overall impact resistance of the glass. In this paper, two conventional laminated glass thicknesses of 0.76[Formula: see text]mm and 1.52[Formula: see text]mm were selected to study the dynamic performance and damage morphology of laminated glass under three different impact velocities using light gas gun impact tests combined with industrial CT scanning-3D reconstruction techniques. The results showed that the PVB sandwich thickness had a significant positive correlation with the energy absorption effect, but under different impact velocities and glass thickness, the sandwich thickness and impact resistance showed a differentiated “marginal effect”. At moderate impact velocities, the impact resistance was most sensitive to the change in sandwich thickness. With the increase in glass thickness, the sensitivity of impact resistance to the change of sandwich thickness decreased. According to the characterization of full-dimensional cracks under medium-velocity impact conditions, it could be seen that the sandwich had the function of buffering dissipation and gathering recovery in different stress directions, and the thickness of the sandwich was a key functional parameter to reduce the flying of glass fragments. Therefore, the results of this study can provide a reference for the analysis and design of the impact resistance of PVB laminated glass.","PeriodicalId":54939,"journal":{"name":"International Journal of Structural Stability and Dynamics","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135923002","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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