Engineering Failure Analysis最新文献_第3页

A framework to prevent failure by mapping faults to maintenance actions in electro-pumps of water distribution networks 通过将故障映射到配水网络中电泵的维护动作来防止故障的框架

IF 5.7 2区工程技术 Q1 ENGINEERING, MECHANICAL

Engineering Failure Analysis

Pub Date : 2026-01-19 DOI: 10.1016/j.engfailanal.2026.110595

Masoud Behzad , Mehdi Behzad , Somaye Mohammadi , Mohammad Erfan Yadegari , Mohammad Haghighi

Electro-pumps are critical assets in water distribution networks, yet their performance is compromised by scaling phenomena. Given the interdependence of pump maintenance and associated components such as the motor, coupling, and structure, an integrated framework encompassing all equipment components is needed. This paper presents a maintenance framework for electro-pumping systems that supports maintenance planning by converting vibration and thermographic condition monitoring results into prioritized maintenance actions. Faults are identified and ranked based on their severity and frequency of occurrence, providing practical input for maintenance scheduling and resource allocation. For vibration measurements, sensors were mounted on the drive and non-drive ends of both the motors and pumps. These measurements cover low (10–1,000 Hz) and high (1,000–8,000 Hz) frequency ranges to ensure adequate fault detection resolution. Thermographic images of the pumps were captured in the final round following vibration measurements. The thermographic findings were in strong agreement with the vibration analysis, confirming coupling-related anomalies. The maintenance actions with the highest priority scores were inspecting bearing lubrication and replacement (1.35), resolving coupling issues (1.13), and performing alignment (0.91). In the ranking of maintenance priorities derived from the prioritized maintenance actions, at least two pumps were classified at the highest priority level. The proposed framework not only prioritizes maintenance actions but also employs the derived maintenance priority index to identify critical pumps distributed across different water infrastructure systems on a regional scale. This approach supports failure prevention by enabling timely maintenance scheduling.

电动泵是配水管网中的重要设备，但其性能受到结垢现象的影响。考虑到泵维护和相关组件（如电机、联轴器和结构）的相互依赖性，需要一个包含所有设备组件的集成框架。本文提出了一个电泵系统的维护框架，该框架通过将振动和热成像状态监测结果转换为优先维护行动来支持维护计划。根据故障的严重程度和发生频率对故障进行识别和排序，为维护计划和资源分配提供实用的输入。对于振动测量，传感器安装在电机和泵的驱动端和非驱动端。这些测量涵盖低（10-1,000 Hz）和高（1,000-8,000 Hz）频率范围，以确保足够的故障检测分辨率。泵的热成像图像在振动测量后的最后一轮被捕获。热成像结果与振动分析非常吻合，证实了耦合相关的异常。优先级得分最高的维护行动是检查轴承润滑和更换（1.35），解决耦合问题（1.13）和执行对准（0.91）。在由优先维护行动得出的维护优先级排序中，至少有两台泵被列为最高优先级。提出的框架不仅对维护行动进行优先排序，而且还采用派生的维护优先指数来确定分布在区域范围内不同水基础设施系统中的关键泵。这种方法通过启用及时的维护计划来支持故障预防。

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引用次数: 0

Failure investigation of gears on a tyre manufacturing machine 轮胎制造机齿轮故障研究

IF 5.7 2区工程技术 Q1 ENGINEERING, MECHANICAL

Engineering Failure Analysis

Pub Date : 2026-01-19 DOI: 10.1016/j.engfailanal.2026.110593

MN James , D Bernard , C Louis , L. Matthews , DG Hattingh

This failure investigation deals with an apparently straightforward case of gear failure that was undertaken to see whether it contained any cracking that pre-existed the final fracture of a tooth. Some interesting features were observed in this case, as there were several cracks in the gear besides the primary one that led to fracture, showing evidence of at least two different crack initiation mechanisms. These mechanisms were intergranular quench cracking, occasionally involving large inclusions where chevron markings were seen on the ductile fracture surface that pointed back to the local fracture origin, and the observation of very localised intergranular oxidation in the carburised case of the gear that occurred during heat treatment. Both mechanisms of crack initiation then led to fatigue cracking. The final conclusion was that the gears failed prematurely from fatigue cracking initiated by intergranular oxidation combined with an impact load.

这个失败的调查处理明显直截了当的情况下，齿轮的失败是承担，看看它是否包含任何裂纹，预先存在的最后断裂的牙齿。在这种情况下，我们观察到一些有趣的特征，因为除了导致断裂的主要裂纹外，齿轮上还有几条裂纹，这表明至少有两种不同的裂纹起裂机制。这些机制是晶间淬火开裂，偶尔包括在韧性断口表面看到的大夹杂物，这些夹杂物指向局部断裂的起源，以及在热处理过程中发生的齿轮渗碳情况下的非常局部的晶间氧化。两种裂纹萌生机制都导致了疲劳裂纹。最后的结论是，齿轮过早失效的疲劳裂纹由晶间氧化结合冲击载荷。

引用次数: 0

Failure analysis of refractory tungsten carbide tool containing different cobalt percentages during friction stir cladding of copper on steel 含不同钴含量的难熔碳化钨刀具在铜钢搅拌摩擦熔覆过程中的失效分析

IF 5.7 2区工程技术 Q1 ENGINEERING, MECHANICAL

Engineering Failure Analysis

Pub Date : 2026-01-19 DOI: 10.1016/j.engfailanal.2026.110592

Mithlesh Kumar Mahto , Adarsh Kumar , Sanjay Kumar Gupta , Pradeep Kumar , Meghanshu Vashista , Mohd Zaheer Khan Yusufzai

The appropriateness of any welding process depends upon the performance of essential components satisfactorily during the operation. In friction stir welding (FSW) of high-temperature softening materials, the life of the non-consumable rotating tool plays a crucial role. During the cladding operation performed by FSW, maintaining the tool geometry intact during subsequent repetitive passes is essential to obtain defect-free cladding. Rapid tool degradation can pose challenges in joining the clad material with the substrate.

In this work, failure analysis of nickel–cobalt-bonded tungsten carbide tool materials has been evaluated while carrying out friction stir cladding of copper on a steel substrate. Two different tool materials with total cobalt-nickel binder content = 10% (designated as tool A) and another tool material designated as tool B (having total binder content = 5%) have been used to carry out the cladding operation. Tool pin abrasion, adhesion, mushrooming, oxide formation, and the appearance of radial grooves in the shoulder region were prominently visible in tool A, containing a higher cobalt-nickel percentage. On the other hand, the tool with lower cobalt content showed no signs of plastic deformation. However, this tool B was susceptible to shear failure. Tool wear characteristics were found to increase with higher clad distance travelled and with higher tool RPM. SEM EDS analysis confirmed adhesion of clad/substrate material to the tool face, while XRD analysis confirmed oxidation of the tool pin surface.

任何焊接工艺的适当性取决于关键部件在操作过程中的令人满意的性能。在高温软化材料的搅拌摩擦焊中，非消耗性旋转刀具的寿命起着至关重要的作用。在FSW进行熔覆过程中，在随后的重复道次中保持刀具几何形状的完整性对于获得无缺陷熔覆至关重要。刀具的快速降解会给复合材料与基体的连接带来挑战。在这项工作中，对镍钴结合碳化钨刀具材料在钢基体上进行铜搅拌摩擦包覆时的失效分析进行了评估。两种不同的刀具材料，钴镍结合剂总含量= 10%（指定为刀具A）和另一种刀具材料指定为刀具B（总结合剂含量= 5%）被用于进行包覆操作。在刀具A中，刀具销磨损、附着、蘑菇状生长、氧化物形成和肩部区域径向凹槽的出现非常明显，含有较高的钴镍百分比。另一方面，钴含量较低的工具没有显示出塑性变形的迹象。然而，该工具B易受剪切破坏。刀具磨损特性随着包层距离的增加和刀具转速的增加而增加。SEM - EDS分析证实包层/衬底材料与刀具表面有粘附，而XRD分析证实刀具销表面氧化。

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引用次数: 0

Multi-crack propagation characteristics and fatigue life prediction of tubular T-joints subjected to in-plane bending 管状t形接头面内弯曲多裂纹扩展特性及疲劳寿命预测

IF 5.7 2区工程技术 Q1 ENGINEERING, MECHANICAL

Engineering Failure Analysis

Pub Date : 2026-01-19 DOI: 10.1016/j.engfailanal.2026.110594

Min Lou , Bin Wu , Yangyang Wang , Weixing Liang , Yu Han

This study investigates the multi-crack propagation characteristics and predicts the fatigue life of six Q355B tubular T-joint specimens subjected to in-plane bending, utilizing a combination of experimental and numerical approaches. A series of static tensile tests and fatigue tests are conducted to study the fatigue behavior of tubular T-joints under varying bending load conditions in terms of fatigue crack trajectory, failure morphology and remaining fatigue life. Thereinto, fatigue crack growth is monitored using the beach mark technique, and the fracture morphology at different stages during the crack propagation is examined using scanning electron microscopy. A numerical investigation is carried out to capture the multiple crack coalescence and to predict the remaining fatigue life during the crack propagation process. These studies reveal that two cracks initiate at the brace near crown and propagate toward its depth direction, coalesce into a long crack, continuing to grow circumferentially along the weld toe in the case of a curved morphology. Reasonably good agreements are achieved between experimental and simulated results, with the average error of the whole fatigue life less than 13%. There is generally good agreement between experimental and predicted results in fatigue crack trajectory, failure morphology, and remaining fatigue life.

采用实验与数值相结合的方法，研究了6个Q355B管状t形接头在面内弯曲作用下的多裂纹扩展特性，并对其疲劳寿命进行了预测。通过静态拉伸试验和疲劳试验，研究了管状t形接头在不同弯曲载荷条件下的疲劳行为，包括疲劳裂纹轨迹、失效形态和剩余疲劳寿命。其中，用海滩标记技术监测疲劳裂纹扩展，用扫描电镜观察裂纹扩展过程中不同阶段的断口形貌。对裂纹扩展过程中多重裂纹合并过程进行了数值模拟，并对裂纹扩展过程的剩余疲劳寿命进行了预测。这些研究表明，两个裂纹在靠近凸顶的支撑处开始，并向其深度方向扩展，合并成一个长裂纹，在弯曲形貌的情况下继续沿焊缝趾周向扩展。试验结果与模拟结果吻合较好，整个疲劳寿命的平均误差小于13%。在疲劳裂纹轨迹、失效形态和剩余疲劳寿命方面，试验结果与预测结果基本一致。

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引用次数: 0

Failure mechanism and differential stability control of surrounding rock in an underlying roadway group under fully mechanized top-coal caving: A case study 综放放顶煤下伏巷道组围岩破坏机理及差异稳定性控制研究

IF 5.7 2区工程技术 Q1 ENGINEERING, MECHANICAL

Engineering Failure Analysis

Pub Date : 2026-01-18 DOI: 10.1016/j.engfailanal.2026.110586

Feili Yang , Wei Zhang , Dongsheng Zhang , Yuezhang Zhu , Jingcheng Wang , Beihai Huang , Yanpeng Wang , Mingzhao Dong , Jinfeng Mao

To address severe deformation and control difficulties of underlying roadway groups under fully mechanized top-coal caving (FMTCC)–induced dynamic pressure, this study investigates the 885 FMTCC face and the underlying roadway group of the 88 panel at Zhuxianzhuang Coal Mine through field measurements, numerical simulations, and engineering practice. In situ borehole stress monitoring combined with quantitative borehole peering analysis was used to clarify the stress distribution and fracture development characteristics of the floor under mining. Using a coupled FLAC3D–PFC3D approach, a numerical model was developed to analyze the differentiated failure characteristics of the floor under FMTCC-induced disturbance. Moreover, the failure mechanisms of underlying roadway groups were elucidated. The results revealed that the floor surrounding rock first underwent stress concentration and then stress unloading as the working face advanced. The stress response of different strata varies markedly with burial depth and lithology. All the underlying roadways underwent four evolutionary stages—undisturbed, mining induced failure, disturbance stability transition, and final stabilization—and the intensity of disturbance-induced failure decreases markedly with increasing vertical distance. Building on these findings, a differentiated surrounding rock control technology centered on the “Unloading–Grouting–Anchoring” concept was proposed for underlying roadways at different vertical distances. Field applications show that roadway deformation is effectively controlled across all distances, with an average cross-sectional area retention exceeding 92.6% in major production roadways, confirming the effectiveness of the proposed technology under FMTCC-induced dynamic pressure.

针对综放动压下下伏巷道组变形严重、控制困难的问题，通过现场实测、数值模拟和工程实践，对朱仙庄煤矿885综放工作面及88盘下伏巷道组进行了研究。采用原位钻孔应力监测与定量钻孔窥视分析相结合的方法，明确了采动下底板的应力分布和裂缝发育特征。采用FLAC3D-PFC3D耦合方法，建立了fmtcc扰动下楼板的差异性破坏特征数值模型。分析了下伏巷道群的破坏机理。结果表明：随着工作面推进，底板围岩先发生应力集中，再发生应力卸载；不同地层的应力响应随埋深和岩性的不同而有显著差异。各下伏巷道均经历了未扰动、采动破坏、扰动稳定过渡和最终稳定4个演化阶段，且扰动破坏强度随垂向距离的增加而显著降低。在此基础上，针对不同垂直距离的下伏巷道，提出了一种以“卸载-注浆-锚固”概念为核心的差异化围岩控制技术。现场应用表明，巷道变形在所有距离上都得到了有效控制，主要生产巷道的平均截面积保留率超过92.6%，证实了该技术在fmtcc动压下的有效性。

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引用次数: 0

Fatigue performance of Grade 10.9 M20 high-strength bolts in L-shaped component connections 10.9级M20高强度螺栓在l形构件连接中的疲劳性能

IF 5.7 2区工程技术 Q1 ENGINEERING, MECHANICAL

Engineering Failure Analysis

Pub Date : 2026-01-18 DOI: 10.1016/j.engfailanal.2026.110583

Xu-Ze Feng, Xue-Chun Liu, Xuesen Chen, Wei Zhou, Yong-Li Tao, Ai-lin Zhang

Bolted L-shaped component connections, which are typical configurations in bolted flange splicing joints for columns, are subjected to cyclic tension–compression from wind-induced vibration in high-rise buildings, leading to fatigue failure risks. To investigate the fatigue performance of Grade 10.9 M20 bolts, axial cyclic loading fatigue tests were conducted on 20 specimens with different flange thicknesses. Experimental results revealed that all fatigue failures occurred at the root of the first engaged thread or within the thread engagement region, with preload decay exceeding 30% prior to fracture. A refined finite element model incorporating thread was developed to conduct parametric analyses, demonstrating that the fatigue life significantly improves with increasing flange thickness, column wall thickness, bolt edge distance, and preload. Furthermore, a nominal stress calculation method accounting for bending-axial coupling effects was proposed, and an S–N curve describing the relationship between stress range and fatigue life was established with good fitting accuracy. Comparative analysis against fatigue design recommendations in EN 1993-1-9, ANSI/AISC 360-16, and GB 50017-2017 highlighted conservative predictions of the above codes. Macroscopic fracture morphology analysis of the high-strength bolts was carried out to further elucidate the fatigue failure mechanisms.

l型螺栓构件连接是柱用螺栓翼缘拼接节点的典型结构形式，在高层建筑中受到风振的循环拉压作用，存在疲劳破坏的风险。为研究10.9级M20螺栓的疲劳性能，对20个不同法兰厚度试件进行了轴向循环加载疲劳试验。实验结果表明，所有疲劳失效都发生在第一次啮合螺纹的根部或螺纹啮合区域内，断裂前预紧力衰减超过30%。建立了包含螺纹的精细化有限元模型进行参数分析，结果表明，随着法兰厚度、柱壁厚度、螺栓边距和预紧力的增加，疲劳寿命显著提高。提出了考虑弯轴耦合效应的名义应力计算方法，建立了描述应力范围与疲劳寿命关系的S-N曲线，拟合精度较好。与EN 1993-1-9、ANSI/AISC 360-16和GB 50017-2017的疲劳设计建议进行对比分析，突出了上述规范的保守预测。为进一步阐明高强螺栓的疲劳破坏机理，对高强螺栓进行了宏观断口形貌分析。

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引用次数: 0

Failure analyses of J85 engine compressor caused by Alloy 718 internal object debris J85发动机压气机718合金内部物体碎片失效分析

IF 5.7 2区工程技术 Q1 ENGINEERING, MECHANICAL

Engineering Failure Analysis

Pub Date : 2026-01-16 DOI: 10.1016/j.engfailanal.2026.110587

Hyeok-Jun Kwon , Hongseok Kim , Youngchan Kim , Dooyoul Lee

This study analyzed two extremely rare internal object damage (IOD) events in the prevalent J85 engine, which are attributable to the long-term operation of its compressor parts. In both cases, the damaged parts (retaining ring, compressor 7th stator vane) were made of the same alloy 718 material, and the presence of material defects was investigated first. The first case involved a retaining ring fasten pin that fractured in half, collided, and stuck to the rotor blade’s leading edge. The root cause of pin failure was confirmed as a microstructural defect. The second case, a compressor 7th stator vane fracture, was linked to resonance that depleted its fatigue life and led to premature failure. In particular, changes in vibration modes occurring during aeroengine operation, along with microstructural defects, might be the main causes of fatigue crack initiation and propagation. Each unique IOD case can provide valuable insights into advanced gas turbine aeroengine design and operation.

本研究分析了常见的J85发动机中两种极为罕见的内部物体损伤（IOD）事件，这两种事件可归因于其压缩机部件的长期运行。在这两种情况下，损坏的部件（固定环，压缩机第7定子叶片）都是由相同的718合金材料制成的，并且首先调查了材料缺陷的存在。第一个案例涉及一个固定环固定销断裂成两半，碰撞，并粘在转子叶片的前缘。pin失效的根本原因被确认为微观结构缺陷。第二种情况是压缩机第7定子叶片断裂，与共振有关，导致其疲劳寿命缩短，导致过早失效。特别是，航空发动机在运行过程中振动模式的变化，以及微结构缺陷，可能是疲劳裂纹萌生和扩展的主要原因。每个独特的IOD案例都可以为先进的燃气涡轮航空发动机设计和运行提供有价值的见解。

引用次数: 0

Failure analysis of cast aluminum A356-T6 light pole bases following Catastrophic Hurricane Exposure: Microstructural, Mechanical, and Fractographic investigations 灾难性飓风暴露后铸铝A356-T6灯杆基座的失效分析：微观结构、力学和断口学研究

IF 5.7 2区工程技术 Q1 ENGINEERING, MECHANICAL

Engineering Failure Analysis

Pub Date : 2026-01-16 DOI: 10.1016/j.engfailanal.2026.110575

Flavia da Cruz Gallo , Mariel Ojeda-Tuz , Ciaran O’Rourke , Ryan Catarelli , Jennifer Bridge

Multiple aluminum light poles in Florida failed during recent hurricanes at wind speeds below design specifications, raising concerns about structural integrity and manufacturing quality. This study investigates the failure of cast A356-T6 aluminum alloy bases through combined metallurgical analysis and finite element modeling. Computed Tomography (CT) and metallography revealed critical porosity levels (5.9 – 8.2 %) exceeding ASTM acceptance thresholds, along with microstructural variability near bolt holes. Local hardness and tensile testing indicated reduced yield strength, approximately 20 – 25 % relative to nominal A356-T6 values, consistent with casting defects and installation-induced pre-strain, significantly narrowing the safety margin under hurricane winds. Fracture morphology confirmed monotonic overload rather than fatigue. A full-scale finite element model of the Lake Jessup Bridge base assembly was developed to evaluate stress distribution under design-level and hurricane-level wind loading while incorporating measured material properties and installation irregularities. Simulations showed that when porosity-reduced strength was combined with geometric stress risers and uneven leveling-nut preload, localized stresses exceeded the experimentally measured yield strength (∼116 MPa) even under wind speeds below design thresholds. This study is the first to integrate CT-quantified porosity, field installation audits, tensile testing, and wind-driven structural modeling to explain premature hurricane-induced failures of cast aluminum pole bases. The findings demonstrate that premature failures resulted from the synergistic interaction of casting defects, geometric vulnerability, and installation-induced overloads rather than a single governing mechanism. Recommendations include stricter casting quality control, torque-limiting installation protocols, and minor design modifications aimed at reducing stress concentrations and improving reliability of aluminum infrastructure in hurricane-prone regions.

佛罗里达州的多个铝灯杆在最近的飓风中因风速低于设计规格而失效，引发了人们对结构完整性和制造质量的担忧。采用金相分析和有限元模拟相结合的方法，对铸造A356-T6铝合金底座的失效进行了研究。计算机断层扫描（CT）和金相分析显示，临界孔隙度水平（5.9% - 8.2%）超过了ASTM的接受阈值，螺栓孔附近的微观结构也发生了变化。局部硬度和拉伸测试表明，与A356-T6标称值相比，屈服强度降低了约20 - 25%，与铸造缺陷和安装引起的预应变一致，显著缩小了飓风下的安全边际。断口形貌证实为单调过载而非疲劳。开发了Jessup湖大桥基础组件的全尺寸有限元模型，以评估设计级和飓风级风荷载下的应力分布，同时结合测量的材料特性和安装不规则性。模拟结果表明，当孔隙度降低强度与几何应力上升管和不均匀调平螺母预载荷相结合时，即使在低于设计阈值的风速下，局部应力也超过了实验测量的屈服强度（~ 116 MPa）。该研究首次将ct量化孔隙度、现场安装审核、拉伸测试和风力驱动结构建模整合在一起，以解释铸铝杆基座因飓风而过早失效的原因。研究结果表明，过早失效是由铸造缺陷、几何脆弱性和安装引起的过载协同作用造成的，而不是单一的控制机制。建议包括更严格的铸造质量控制，限制扭矩的安装协议，以及旨在减少应力集中和提高飓风易发地区铝基础设施可靠性的微小设计修改。

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引用次数: 0

Failure analysis of a centrifugal pump impeller in erosive flow conditions 某离心泵叶轮在侵蚀工况下的失效分析

IF 5.7 2区工程技术 Q1 ENGINEERING, MECHANICAL

Engineering Failure Analysis

Pub Date : 2026-01-16 DOI: 10.1016/j.engfailanal.2026.110584

Rehan Khan , Moiz Ahmad , Shahbaz Ali , Faez Qahtani , Tariq Talha , Saeed Alqaed , Jawed Mustafa , Syed Osama Safdar

Erosion is a critical factor that significantly reduces the service life of rotor blades in centrifugal pumps operating under sand particle-laden flows. In this study, a carbon steel blade from a submerged centrifugal pump experienced severe damage after only a few days of continuous operation at the Centre for Erosion-Corrosion Research. The most prominent damage was observed along the outer edges and raised guide vanes of the impeller blade, with localized wall thinning. To investigate the underlying failure mechanisms, a comprehensive analysis was conducted combining visual inspection, scanning electron microscopy (SEM), 3D surface scanning, energy-dispersive spectroscopy (EDS), and laser profilometry measurements. Numerical simulations were performed using computational fluid dynamics (CFD) coupled with the discrete phase model (DPM) to model particle-laden flow behavior and identify critical erosion zones. Unlike prior studies focused solely on simulation or idealized models, this work integrates real-world failure evidence with validated CFD-DPM modeling to establish a direct correlation between physical degradation and predicted erosion. The results revealed that erosion in high-impact regions was nearly twice as severe as in low-impact areas, primarily driven by high turbulence intensity and repeated impingement of 300 µm sand particles at flow velocities exceeding 5 m/s. A maximum erosion rate of 3.8 × 10⁻⁵ kg/m²·s was observed. This study provides new insights into the spatial relationship between flow-induced turbulence and material loss, contributing valuable data for improving pump blade durability and predictive wear modeling in abrasive fluid environments.

在含砂流中，腐蚀是显著降低离心泵转子叶片使用寿命的关键因素。在这项研究中，浸没式离心泵的碳钢叶片在连续运行几天后就在侵蚀腐蚀研究中心遭受了严重的损坏。叶轮叶片外缘和导叶凸起处损伤最明显，局部壁变薄。为了研究潜在的失效机制，研究人员结合目视检查、扫描电子显微镜（SEM）、3D表面扫描、能量色散光谱（EDS）和激光轮廓测量进行了综合分析。利用计算流体力学（CFD）和离散相模型（DPM）进行了数值模拟，模拟了颗粒载荷下的流动行为，并确定了临界侵蚀区域。与之前的研究只关注模拟或理想化模型不同，这项工作将现实世界的失效证据与经过验证的CFD-DPM模型结合起来，建立了物理退化与预测侵蚀之间的直接关联。结果表明，高冲击区域的侵蚀程度几乎是低冲击区域的两倍，这主要是由高湍流强度和300µm沙粒以超过5 m/s的流速反复撞击造成的。最大侵蚀速率为3.8 × 10−5 kg/m2·s。该研究为流动诱导湍流与材料损失之间的空间关系提供了新的见解，为提高泵叶片耐久性和预测磨料流体环境下的磨损建模提供了有价值的数据。

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引用次数: 0

Simulation-driven estimation of stiffness and damping coefficients using Sommerfeld curves for vibration reduction in induced draft fans 基于Sommerfeld曲线的诱导通风机减振刚度和阻尼系数仿真估计

IF 5.7 2区工程技术 Q1 ENGINEERING, MECHANICAL

Engineering Failure Analysis

Pub Date : 2026-01-15 DOI: 10.1016/j.engfailanal.2026.110578

Erick-Alejandro González-Barbosa , Jose-Juan Vázquez-Martínez , Gerardo Trejo-Caballero , Hector Castro-Mosqueda , Fernando Jurado Pérez , Alfonso Ramírez-Pedraza , José-Joel González-Barbosa

Computer modeling and simulation are important tools used for solving problems in engineering applied to industry. Proper modeling and simulation testing of the systems under analysis allow for design adjustments before manufacturing, which leads to reductions in time and costs. This project conducts a comprehensive analysis aimed at mitigating excessive vibration in two induced draft fans operating in a thermoelectric power plant. The tools used for the analysis include instrumentation through accelerometers, estimation of stiffness and damping parameters by the Sommerfeld methodology, as well as computer modeling and simulation. The instrumentation enabled estimation of the rotor’s natural frequencies, validated through computer simulation. Finite element analysis (FEA), guided by the Sommerfeld methodology, enhanced simulation accuracy. Sommerfeld curves, reconstructed from low-resolution 1965 printed sources (original digital data unavailable), were digitized and subsequently reconstructed using the Smoothing Spline algorithm for continuous and coherent profiles. At the end of this study, we present a redesign solution, validated through computer modeling and simulation, to reduce excessive vibration in two induced draft fans of a thermoelectric power plant.

计算机建模和仿真是解决工业工程问题的重要工具。对所分析的系统进行适当的建模和仿真测试，可以在制造之前进行设计调整，从而减少时间和成本。本项目针对某热电厂两台引风机的过度振动问题进行了综合分析。用于分析的工具包括通过加速度计的仪器仪表，通过Sommerfeld方法估计刚度和阻尼参数，以及计算机建模和仿真。该仪器能够估计转子的固有频率，并通过计算机模拟验证。在Sommerfeld方法的指导下，有限元分析（FEA）提高了仿真精度。从1965年低分辨率印刷源（原始数字数据不可用）重建的Sommerfeld曲线被数字化，随后使用平滑样条算法重建连续和连贯剖面。在本研究的最后，我们提出了一个重新设计的解决方案，通过计算机建模和仿真验证，以减少热电厂两个引风机的过度振动。

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引用次数: 0