Experimental Techniques最新文献_第8页

A Non-Contact Damage Calculation Method for Fatigue Testing of Wind Turbine Blades 风电叶片疲劳试验的非接触损伤计算方法

IF 1.9 4区工程技术

Experimental Techniques Pub Date : 2025-04-30 DOI: 10.1007/s40799-025-00801-9

X. Yang, Q. Ma, X. Bai, D. Li, Z. An

{"title":"A Non-Contact Damage Calculation Method for Fatigue Testing of Wind Turbine Blades","authors":"X. Yang, Q. Ma, X. Bai, D. Li, Z. An","doi":"10.1007/s40799-025-00801-9","DOIUrl":"10.1007/s40799-025-00801-9","url":null,"abstract":"<div><p>This paper proposes a novel method for calculating damage in fatigue testing of wind turbine blades using machine vision. With the increasing size of wind turbine blades, biaxial fatigue testing has become a significant area of interest in the industry. The traditional damage calculation method, which relies on strain sensors, becomes unreliable when subjected to biaxial load coupling. In the proposed method, machine vision is utilized to obtain the displacement of target points. A static calibration is then performed to establish the relationship between displacement and bending moment, enabling the real-time measurement of bending moment during fatigue testing. The Miner linear fatigue cumulative damage theory is subsequently applied to calculate the equivalent fatigue cumulative damage. To validate the effectiveness of this method, both static and dynamic experiments were conducted. The results demonstrate that this method achieves the required accuracy for detecting damage in wind turbine blade fatigue testing. Moreover, the data obtained through this method exhibits higher accuracy compared to traditional approaches. The proposed method introduces a novel approach to the wind turbine blade testing industry.</p></div>","PeriodicalId":553,"journal":{"name":"Experimental Techniques","volume":"49 6","pages":"1107 - 1125"},"PeriodicalIF":1.9,"publicationDate":"2025-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145706086","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

On the Cover: A Method for Dynamic Kolsky Bar Compression at High Temperatures: Application to Ti-6Al-4Vs 封面：高温下动态科尔斯基棒压缩方法：在Ti-6Al-4Vs上的应用

IF 1.5 4区工程技术

Experimental Techniques Pub Date : 2025-04-30 DOI: 10.1007/s40799-025-00805-5

引用次数: 0

Experiment and Simulation on Deep Drawing of Magnesium Alloy Sheet with Hole by Sand Die in Different Types of Driving Modes 不同驱动模式下砂模拉深镁合金带孔板的试验与仿真

IF 1.9 4区工程技术

Experimental Techniques Pub Date : 2025-04-23 DOI: 10.1007/s40799-025-00799-0

H. Xinyu, W. Hongyu, W. Chunhui, J. Nan, Y. Deming, L. Hao, H. Naibao, S. Jie, Z. Shunhu

{"title":"Experiment and Simulation on Deep Drawing of Magnesium Alloy Sheet with Hole by Sand Die in Different Types of Driving Modes","authors":"H. Xinyu, W. Hongyu, W. Chunhui, J. Nan, Y. Deming, L. Hao, H. Naibao, S. Jie, Z. Shunhu","doi":"10.1007/s40799-025-00799-0","DOIUrl":"10.1007/s40799-025-00799-0","url":null,"abstract":"<div><p>As one of the lightest metal structural materials, there are a broad application of magnesium alloys. In this paper, a second-stage box-shaped product of AZ31 magnesium alloy are formed by deep drawing with sand die. The effects of three different kinds of driving modes on the forming results will be compared. In order to expand the types of sheets, AZ31 magnesium alloy sheet with or without hole in the center are also taken as the research object. The influences of the key parameters such as: temperature, sheet thickness, sand filling height and hole diameter on the drawing performance will be all investigated by the experiments and simulations. The shape, mechanical properties, and surface quality of the box-shaped products will be discussed. Around the above factors, some forming strategies for a good drawing performance are received. The study will show the optimal strategy for the sand die forming of intricate box-shaped products welded from magnesium alloy, contingent upon various actuation modalities.</p></div>","PeriodicalId":553,"journal":{"name":"Experimental Techniques","volume":"49 6","pages":"1067 - 1087"},"PeriodicalIF":1.9,"publicationDate":"2025-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145706206","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Research on Automatic Attitude Control Technology of Six-Degree-of-Freedom Displacement Compensation for Full-Scale Aircraft Static Test 飞机全尺寸静力试验六自由度位移补偿姿态自动控制技术研究

IF 1.9 4区工程技术

Experimental Techniques Pub Date : 2025-04-23 DOI: 10.1007/s40799-025-00800-w

J. Zheng, F. Jin, B. Wang, B. Mu, W. Liu

{"title":"Research on Automatic Attitude Control Technology of Six-Degree-of-Freedom Displacement Compensation for Full-Scale Aircraft Static Test","authors":"J. Zheng, F. Jin, B. Wang, B. Mu, W. Liu","doi":"10.1007/s40799-025-00800-w","DOIUrl":"10.1007/s40799-025-00800-w","url":null,"abstract":"<div><p>A novel closed-loop control principle was proposed for precisely controlling the attitude of full-scale aircraft during static test under large deformation. The test system was developed by integrating a displacement acquisition system, an industrial computer platform, a coordinated control system and hydraulic actuators. The displacement acquisition system was employed to facilitate the real-time sensing of the aircraft attitude changes. This was subsequently analyzed by computers to calculate attitude errors, based on which the compensation values were calculated for attitude correction. The correction was converted into voltage signals through an in-house program pre-integrated into the industrial computer platform. Finally, the MTS coordinated control system generates new control parameters based on the voltage signals, enabling a real-time adjustment on the movement of hydraulic actuators, which modifies the aircraft attitude. A device was developed for simulating the deformation characteristics of aircrafts under large deformation. A six-degree-of-freedom restraint system has been installed on the device according to the principle. Experiments were conducted to verify the capability of the approach for precisely controlling the aircraft attitude under various deformation states. Results showed that the aircraft attitudes were all restored to a value close to the theoretical attitude via displacement compensation scheme proposed, with the translational error less than ± 2 mm and the rotational error less than ± 0.02°. Whilst these errors were successfully reduced by applying the compensation algorithm during loading, they cannot be completely eliminated due to the influence of measurement and control errors.</p></div>","PeriodicalId":553,"journal":{"name":"Experimental Techniques","volume":"49 6","pages":"1089 - 1106"},"PeriodicalIF":1.9,"publicationDate":"2025-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s40799-025-00800-w.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145706207","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Reflection and Transmission of Longitudinal Elastic Stress Pulses in Cylindrical Bars with Discontinuities in Cross Section and/or Material Properties 纵向弹性应力脉冲在具有截面不连续和/或材料特性的圆柱杆中的反射和传递

IF 1.9 4区工程技术

Experimental Techniques Pub Date : 2025-04-12 DOI: 10.1007/s40799-025-00795-4

T. Yokoyama, K. Nakai

引用次数: 0

Investigation of Thermoelastic Buckling Behavior on Nanobeam Resonator via Nonlocal Strain Gradient Theory 基于非局部应变梯度理论的纳米梁谐振腔热弹性屈曲行为研究

IF 1.9 4区工程技术

Experimental Techniques Pub Date : 2025-04-12 DOI: 10.1007/s40799-025-00798-1

J. Zhuang, Z. Xiong, B. Gu

{"title":"Investigation of Thermoelastic Buckling Behavior on Nanobeam Resonator via Nonlocal Strain Gradient Theory","authors":"J. Zhuang, Z. Xiong, B. Gu","doi":"10.1007/s40799-025-00798-1","DOIUrl":"10.1007/s40799-025-00798-1","url":null,"abstract":"<div><p>With the rapid development of micro/nano-electromechanical systems (MEMS/NEMS), the issue of thermoelastic coupling and buckling in micro/nano-structures has become a key area of research. The classical continuum mechanics theories struggle to effectively detail the mechanical characteristics of micro/nano-structures under non-uniform temperature distributions, the current research primarily concentrates on the micro-scale effects of single strain fields, with limited analysis on the combined impacts of thermal and mechanical nonlocal effects. This paper explores the thermomechanical buckling of micro/nano-beams under nonuniform temperature distributions using nonlocal strain gradient theory with thermal considerations. The study finds that nonlocal effects in micro-scale phenomena lead to a decrease in critical load, while higher-order strain gradients tend to increase the critical load. Additionally, thermal effects also contribute to an increase in critical load. It is known that buckling can affect the load-bearing capacity and stability of a structure, thereby ensuring the safety and reliability of structures in engineering. The present study focuses on enriching micro-scale theories for stability analysis of micro/nano-scale structures, consequently offering valuable insights for enhancing structural stability and optimizing the performance of micro/nano devices.</p></div>","PeriodicalId":553,"journal":{"name":"Experimental Techniques","volume":"49 6","pages":"1041 - 1050"},"PeriodicalIF":1.9,"publicationDate":"2025-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145706232","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Evaluation of Identification Methods for Joints with Inaccessible Interfaces Using Frequency-Based Substructuring 基于频率子结构的不可访问界面关节识别方法评价

IF 1.9 4区工程技术

Experimental Techniques Pub Date : 2025-04-07 DOI: 10.1007/s40799-025-00797-2

M. Di Manno, J. Brunetti, W. D’Ambrogio, A. Fregolent

{"title":"Evaluation of Identification Methods for Joints with Inaccessible Interfaces Using Frequency-Based Substructuring","authors":"M. Di Manno, J. Brunetti, W. D’Ambrogio, A. Fregolent","doi":"10.1007/s40799-025-00797-2","DOIUrl":"10.1007/s40799-025-00797-2","url":null,"abstract":"<div><p>Recently, there has been significant interest in mechanical joint identification through dual substructure decoupling. In this method, each component of a complex mechanical system is handled as an independent substructure. The joint is then identified by subtracting the measured dynamics of the connected subsystems from those of the assembled system. A major challenge with this approach is the need to measure both translational and rotational Frequency Response Functions (FRFs) at the interface between subsystems (interface DoFs). This is often impractical due to the limited space available to place instrumentation. To address this challenge, several techniques available in the literature can be used to derive FRFs at the interface between components using the available measurements. This paper presents a comparative study of three joint identification methods that use two state-of-the-art techniques for obtaining the interface FRFs required for the decoupling process, based on available measurements: Virtual Point Transformation (VPT) and System Equivalent Model Mixing (SEMM). In particular, the advantages and disadvantages of the three methods that combine decoupling with VPT, SEMM, or both, are discussed. Special attention is given to the error propagation associated with each technique. The study is conducted using experimental data from a laboratory benchmark. The results show that the direct VPT approach and the one combining SEMM with VPT give similar results, suggesting that the SEMM is able to accurately reconstruct the FRFs at the boundary DoFs.</p></div>","PeriodicalId":553,"journal":{"name":"Experimental Techniques","volume":"49 6","pages":"1023 - 1040"},"PeriodicalIF":1.9,"publicationDate":"2025-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145706135","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Optimization of an Impedance-Matched Test Fixture with the Modal Projection Error 考虑模态投影误差的阻抗匹配测试夹具优化

IF 1.9 4区工程技术

Experimental Techniques Pub Date : 2025-04-07 DOI: 10.1007/s40799-025-00794-5

T.F. Schoenherr, B. Zwink, R. Schultz

{"title":"Optimization of an Impedance-Matched Test Fixture with the Modal Projection Error","authors":"T.F. Schoenherr, B. Zwink, R. Schultz","doi":"10.1007/s40799-025-00794-5","DOIUrl":"10.1007/s40799-025-00794-5","url":null,"abstract":"<div><p>Across many industries and engineering disciplines, components and systems are designed and deployed into their operational environment of intended use. It is the desire of the design agency to be able to predict whether their component or system will function in its shock and vibration environments or if it will fail due to mechanical stresses. One method to determine if the component will survive the shock and vibration environments is to expose the component to the operational environment in a laboratory. One difficulty in executing a representative laboratory test is that the component may not have the same boundary condition in the laboratory as in the operational configuration. This paper examines the use of parameterized optimization to design the test fixture in order to better match the operational configuration. Several frequency and modal-based objective functions are examined for the optimization. The study shows that the Modal Projection Error objective function performs the best of the functions studied. The efficacy of the Modal Projection Error is demonstrated with respect to dynamic test fixture design on several analytical and experimental exemplars.</p></div>","PeriodicalId":553,"journal":{"name":"Experimental Techniques","volume":"50 1","pages":"127 - 143"},"PeriodicalIF":1.9,"publicationDate":"2025-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s40799-025-00794-5.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147337606","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Principal Component Analysis-Based Real-Time Diagnosis of Chatter, Vibration, and Surface Roughness for Machining Quality 基于主成分分析的颤振、振动和加工质量表面粗糙度实时诊断

IF 1.9 4区工程技术

Experimental Techniques Pub Date : 2025-03-26 DOI: 10.1007/s40799-025-00784-7

T.C. Chan, B.H. Huang, R. Behera, S.V.V.S. Reddy

{"title":"Principal Component Analysis-Based Real-Time Diagnosis of Chatter, Vibration, and Surface Roughness for Machining Quality","authors":"T.C. Chan, B.H. Huang, R. Behera, S.V.V.S. Reddy","doi":"10.1007/s40799-025-00784-7","DOIUrl":"10.1007/s40799-025-00784-7","url":null,"abstract":"<div><p>Mechanical vibrations, which adversely affect the surface quality of machined components, pose critical challenges in machining processes. This study uses a predictive diagnostic performance system (PDPS) and ChatterPro software to investigate the relationship between vibration signals and surface quality. Experiments were conducted on a milling machine at various spindle speeds, with ten machining tests repeated five times under identical parameters, using consistent material and tooling for side milling. Vibration signals were processed through PDPS and analyzed via principal component analysis (PCA). The principal component distribution map and the correlation between chatter frequency and surface roughness were examined. The surface roughness measurements in the five groups with lower chatter vibrations (groups 1, 2, 3, 7, and 8) ranged from 0.36 to 0.68 µm, while those in the five groups with higher chatter vibrations (groups 4, 5, 6, 9, and 10) ranged from 0.98 to 2.26 µm. This demonstrates a proportional relationship between surface roughness and chatter frequency. Results indicated that increased chatter frequencies were associated with rougher surface finishes. This analysis demonstrates how specific vibration signals can detect chatter and assess cutting conditions in real-time. In future applications, software-based detection of vibration signals could allow for real-time monitoring of machining processes, enabling machine networking, mobile alerts, and reduced operator supervision.</p></div>","PeriodicalId":553,"journal":{"name":"Experimental Techniques","volume":"49 6","pages":"1003 - 1021"},"PeriodicalIF":1.9,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145706008","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Vibrothermography Technique for Non-Destructive Testing 无损检测用振动热成像技术

IF 1.9 4区工程技术

Experimental Techniques Pub Date : 2025-03-26 DOI: 10.1007/s40799-025-00793-6

A. Saboktakin

引用次数: 0