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Journal articles on the topic 'BLADE STRUCTURAL CHARACTERISTICS'

Author: Grafiati

Published: 11 September 2023

Last updated: 31 July 2025

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1

Li, Chaofeng, Shihua Zhou, Shuhua Yang, Xiang Ren, and Bangchun Wen. "Dynamic Characteristics of Blade-Disk-Rotor System with Structural Mistuned Features." Open Mechanical Engineering Journal 8, no. 1 (2014): 138–43. http://dx.doi.org/10.2174/1874155x20140501008.

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The finite element method is adopted to establish the dynamical models of blade, bladed disk and blades-diskshaft assemblies. Based on the analysis of mistuned structure and the dynamic characteristics of model in different levels, it gives the vibration mode distribution of different models. The research shows that the characteristics of the bladed disk and shaft have a huge difference, where some modes are caused by the strongly split and coupled vibration. The mistuned effects are likely to cause different coupled vibrations of blades between the blades-disk model and the blades-disk-shaft

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2

Xing, Zhitai, Yan Jia, Lei Zhang, et al. "Research on Wind Turbine Blade Damage Fault Diagnosis Based on GH Bladed." Journal of Marine Science and Engineering 11, no. 6 (2023): 1126. http://dx.doi.org/10.3390/jmse11061126.

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With the increasing installed capacity of wind turbines, ensuring the safe operation of wind turbines is of great significance. However, the failure of wind turbines is still a severe problem, especially as blade damage can cause serious harm. To detect blade damage in time and prevent the accumulation of microdamage of blades evolving into severe injury, a damage dataset based on GH Bladed simulation of blade damage is proposed. Then, based on the wavelet packet analysis theory method, the MATLAB software can automatically analyze and extract the energy characteristics of the signal to identi

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3

Xu, Lin, Wen Lei Sun, and An Wu. "Structural Properties Analysis of Composite Wind Turbine Blade." Key Engineering Materials 522 (August 2012): 602–5. http://dx.doi.org/10.4028/www.scientific.net/kem.522.602.

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In the process of wind turbine operation, the blade needs to withstand various kinds of loads. With wind turbine power kept getting bigger, the strength requirement of the blades become higher. In order to improve the strength of the blade, lots of new composite materials are use in blade material component parts. This paper studies the geometry laminated structure, external and structural characteristics of composite blade.

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4

Chetan, Mayank, Shulong Yao, and D. Todd Griffith. "Flutter behavior of highly flexible blades for two- and three-bladed wind turbines." Wind Energy Science 7, no. 4 (2022): 1731–51. http://dx.doi.org/10.5194/wes-7-1731-2022.

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Abstract. With the progression of novel design, material, and manufacturing technologies, the wind energy industry has successfully produced larger and larger wind turbine rotor blades while driving down the levelized cost of energy (LCOE). Though the benefits of larger turbine blades are appealing, larger blades are prone to aeroelastic instabilities due to their long, slender, highly flexible nature, and this effect is accentuated as rotors further grow in size. In addition to the trend of larger rotors, non-traditional rotor concepts are emerging including two-bladed rotors and downwind con

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5

Rogge, Timo, Ricarda Berger, Linus Pohle, Raimund Rolfes, and Jörg Wallaschek. "Efficient structural analysis of gas turbine blades." Aircraft Engineering and Aerospace Technology 90, no. 9 (2018): 1305–16. http://dx.doi.org/10.1108/aeat-05-2016-0085.

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Purpose The purpose of this study a fast procedure for the structural analysis of gas turbine blades in aircraft engines. In this connection, investigations on the behavior of gas turbine blades concentrate on the analysis and evaluation of starting dynamics and fatigue strength. Besides, the influence of structural mistuning on the vibration characteristics of the single blade is analyzed and discussed. Design/methodology/approach A basic computation cycle is generated from a flight profile to describe the operating history of the gas turbine blade properly. Within an approximation approach f

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6

Zhang, Yaqiong, Fubin Wang, Jinchao Liu, et al. "A Survey of Aero-Engine Blade Modeling and Dynamic Characteristics Analyses." Aerospace 11, no. 8 (2024): 638. http://dx.doi.org/10.3390/aerospace11080638.

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The rotating blade is a key component of an aero-engine, and its vibration characteristics have an important impact on the performance of the engine and are vital for condition monitoring. This paper reviews the research progress of blade dynamics, including three main aspects: modeling of blades, solution methods, and vibration characteristics. Firstly, three popular structural dynamics models for blades are reviewed, namely lumped-mass model, finite element model, and semi-analytical model. Then, the solution methods for the blade dynamics are comprehensively described. The advantages and li

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7

Krumbein, S., M. Jentzsch, J. Saverin, C. N. Nayeri, and C. O. Paschereit. "The Underwater Berlin Research Turbine: A Wind Turbine Model for Wake Investigations in a Water Towing Tank." Journal of Physics: Conference Series 2767, no. 4 (2024): 042011. http://dx.doi.org/10.1088/1742-6596/2767/4/042011.

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Abstract The design of a three-bladed horizontal axis research wind turbine for wake investigations is described. The turbine has a rotor diameter of 1.3 m and will be operated in a large water towing tank at a submergence depth of 2.5 m, yielding 3.3 % blockage. The test rig is configured to allow for underwater-stereo-particle-image-velocimetry measurements of the near and the far wake at chordwise Reynolds numbers approaching 700 000. The low-Reynolds number airfoil SG6040 is selected to constitute the rotor blades. Cavitation-free operation is assured by assigning a rated angle of attack o

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8

Mignolet, M. P., A. J. Rivas-Guerra, and J. P. Delor. "Identification of Mistuning Characteristics of Bladed Disks From Free Response Data—Part I." Journal of Engineering for Gas Turbines and Power 123, no. 2 (1999): 395–403. http://dx.doi.org/10.1115/1.1338949.

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The focus of the present two-part investigation is on the estimation of the dynamic properties, i.e., masses, stiffnesses, natural frequencies, mode shapes and their statistical distributions, of turbomachine blades to be used in the accurate prediction of the forced response of mistuned bladed disks. As input to this process, it is assumed that the lowest natural frequencies of the blades alone have been experimentally measured, for example, in a broach block test. Since the number of measurements is always less than the number of unknowns, this problem is indeterminate in nature. In this fir

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9

Petukhov, A. N., and F. D. Kiselev. "THE IMPACT OF STRESS CONCENTRATORS ON THE STRUCTURAL STRENGTH OF CAST TURBINE BLADES OF AIRCRAFT ENGINES." Industrial laboratory. Diagnostics of materials 85, no. 5 (2019): 52–66. http://dx.doi.org/10.26896/1028-6861-2019-85-5-52-66.

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Assessing of the quality parameters of the blade manufacture, which can affect their operational performance, is an important step in determining the causes of turbine blade destruction. Manufacturing defects, despite their great diversity, tend to be stress concentrators. Apart from the defects listed in the specifications to be avoided upon blade manufacturing, we mean also various kinds of defects identified as concentrators that contribute to the destruction of the blades in operation. Assessment of the blade quality suggests identification and analysis of the defects, as well as determina

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10

Aleshin, Mikhail, Aleksandr Smirnov, Margarita Murzina, and Yuri Boldyrev. "On Structural Optimization of The Propeller Blade." International Journal of Engineering & Technology 7, no. 4.36 (2018): 1203. http://dx.doi.org/10.14419/ijet.v7i4.36.28189.

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The results of the structural optimization of propeller blades are presented taking into account its composite structure and pitch change mechanism of the propeller and using FSI (Fluid-Structure Interaction) approaches. The optimality criterion of the problem is the propeller thrust with optimization parameters being the characteristics of the internal structure of the propeller blade made from a composite. Together with the optimization of the blade shape, the problem is considered which concerns the reduction of the deformations caused by loads occurring during the operation of the propelle

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11

Aleshin, Mikhail, Aleksandr Smirnov, Margarita Murzina, and Yuri Boldyrev. "On Structural Optimization of the Propeller Blade." International Journal of Engineering & Technology 7, no. 4.36 (2018): 1203. http://dx.doi.org/10.14419/ijet.v7i4.36.28212.

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The results of the structural optimization of propeller blades are presented taking into account its composite structure and pitch change mechanism of the propeller and using FSI (Fluid-Structure Interaction) approaches. The optimality criterion of the problem is the propeller thrust with optimization parameters being the characteristics of the internal structure of the propeller blade made from a composite. Together with the optimization of the blade shape, the problem is considered which concerns the reduction of the deformations caused by loads occurring during the operation of the propelle

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12

Lin, Yifeng, Jiandong Xiao, Conghuan Le, Puyang Zhang, Qingshan Chen, and Hongyan Ding. "Bearing Characteristics of Helical Pile Foundations for Offshore Wind Turbines in Sandy Soil." Journal of Marine Science and Engineering 10, no. 7 (2022): 889. http://dx.doi.org/10.3390/jmse10070889.

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Helical pile foundations are a new foundation type for offshore wind power applications with high bearing capacity and good recovery that can be quickly and easily constructed. In this study, the finite element method was used to simulate the bearing characteristics of helical pile foundations after installation. For simulations, a blade, deeply buried in a single layer of sand, was selected. Through numerical simulations, the vertical bearing characteristics of a single helical screw pile and an ordinary pile without blades were compared, and the compression and uplift characteristics of the

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13

Zhu, Jie, Xin Cai, Pan Pan, and Rong Rong Gu. "Static and Dynamic Characteristics Study of Wind Turbine Blade." Advanced Materials Research 383-390 (November 2011): 1895–900. http://dx.doi.org/10.4028/www.scientific.net/amr.383-390.1895.

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Structural analysis of wind turbine blade is a necessary part in the process of blade design. Based on the ANSYS software, the stress and strain distribution analysis of a kind of 1500kW horizontal axis wind turbine blade is carried out at the action of ultimate flapwise loads, the vibration mode shapes of this blade are also analyzed in this paper, thus providing some reference value for the larger-scale wind turbine blade on structural design.

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14

Zhu, Jie, Xin Cai, Pan Pan, and Rong Rong Gu. "Static and Dynamic Characteristics Study of Wind Turbine Blade." Advanced Materials Research 433-440 (January 2012): 438–43. http://dx.doi.org/10.4028/www.scientific.net/amr.433-440.438.

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Structural analysis of wind turbine blade is a necessary part in the process of blade design. Based on the ANSYS software, the stress and strain distribution analysis of a kind of 1500kW horizontal axis wind turbine blade is carried out at the action of ultimate flapwise loads, the vibration mode shapes of this blade are also analyzed in this paper, thus providing some reference value for the larger-scale wind turbine blade on structural design．

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15

Zhu, Shi Fan, and Ibrohim Rustamov. "Structural Design and Finite Element Analysis of Composite Wind Turbine Blade." Key Engineering Materials 525-526 (November 2012): 225–28. http://dx.doi.org/10.4028/www.scientific.net/kem.525-526.225.

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This paper presents structural studies of a medium scale composite wind turbine blade construction made of epoxy glass fiber for a 750kW rated power stall regulated horizontal axis wind turbine system. The complex geometry of the blade with a skin-spar foam sandwich structure was generated by utilizing commercial code ANSYS finite element package. Dimensions of twist, chord and thickness were developed by computer program. NREL S-series airfoils with different chord thickness are used along current blade cross-sections. The current design method uses blade element momentum (BEM) theory to comp

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16

Rivas-Guerra, A. J., M. P. Mignolet, and J. P. Delor. "Identification of Mistuning Characteristics of Bladed Disks From Free Response Data— Part II." Journal of Engineering for Gas Turbines and Power 123, no. 2 (1999): 404–11. http://dx.doi.org/10.1115/1.1338950.

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Abstract:

The focus of the present two-part investigation is on the estimation of the dynamic properties, i.e., masses, stiffnesses, natural frequencies, mode shapes and their statistical distributions, of turbomachine blades to be used in the accurate prediction of the forced response of mistuned bladed disks. As input to this process, it is assumed that the lowest natural frequencies of the blades alone have been experimentally measured, for example in a broach block test. Since the number of measurements is always less than the number of unknowns, this problem is indeterminate in nature. In this seco

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17

Loss, Theresa, and Alexander Bergmann. "Vibration-Based Fingerprint Algorithm for Structural Health Monitoring of Wind Turbine Blades." Applied Sciences 11, no. 9 (2021): 4294. http://dx.doi.org/10.3390/app11094294.

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Monitoring the structural health of wind turbine blades is essential to increase energy capture and operational safety of turbines, and therewith enhance competitiveness of wind energy. With the current trends of designing blades ever longer, detailed knowledge of the vibrational characteristics at any point along the blade is desirable. In our approach, we monitor vibrations during operation of the turbine by wirelessly measuring accelerations on the outside of the blades. We propose an algorithm to extract so-called vibration-based fingerprints from those measurements, i.e., dominant vibrati

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18

Li, Bei, De Tian, Xiaoxuan Wu, Huiwen Meng, and Yi Su. "The Impact of Bend–Twist Coupling on Structural Characteristics and Flutter Limit of Ultra-Long Flexible Wind Turbine Composite Blades." Energies 16, no. 15 (2023): 5829. http://dx.doi.org/10.3390/en16155829.

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Flutter is an instability phenomenon that can occur in wind turbine blades due to fluid–structure interaction, particularly for longer and more flexible blades. Aeroelastic tailoring through bend–twist coupling is an effective method to enhance the aeroelastic performance of blades. In this study, we investigate the impact of bend–twist coupling on the structural performance and flutter limit of the IEA 15 MW blade, which is currently the longest reference wind turbine blade, and determine the optimal layup configuration that maximizes the flutter speed. The blade is modeled by NuMAD and iVABS

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19

Liang, Zhi Chao, Jie Hong, Yan Hong Ma, and Tian Yuan He. "FEM Modeling Technology and Vibration Analysis of Flexible Rotor System." Applied Mechanics and Materials 226-228 (November 2012): 257–61. http://dx.doi.org/10.4028/www.scientific.net/amm.226-228.257.

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The low-pressure spool in a high-bypass ratio turbofan engine has its unique characteristics. The slightness rotor and the large lumped mass in blade and disk are the structural characteristics while the dynamic coupling between bladed-disk and shaft is the mechanical characteristic. This paper studies on the modeling technology of a flexible rotor system based on the finite element method (FEM). The equivalent-disk method, an equivalent principle of finite element modeling, is put forward. The blades are equivalent to a disk which can not only retain the structural and mechanical characterist

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20

Zhang, Yuquan, Zhiqiang Liu, Chengyi Li, et al. "Fluid–Structure Interaction Modeling of Structural Loads and Fatigue Life Analysis of Tidal Stream Turbine." Mathematics 10, no. 19 (2022): 3674. http://dx.doi.org/10.3390/math10193674.

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Developing reliable tidal-energy turbines of a large size and capacity links to preservation of the structural safety and stability of the blades. In this study, a bidirectional fluid–structure coupling method was applied to analyze the hydrodynamic performance and structural characteristics of the blade of a tidal-stream turbine. Analyses were conducted on the transient and stable structural stresses, fatigue, and deformations under the influence of water depth and turbine rotational speed. The performance predictions with and without fluid–structure coupling are similar to measurements. The

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21

Jebieshia, T. R., Senthil Kumar Raman, and Heuy Dong Kim. "Aerodynamic and Structural Characteristics of a Centrifugal Compressor Impeller." Applied Sciences 9, no. 16 (2019): 3416. http://dx.doi.org/10.3390/app9163416.

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The present study focuses on the aerodynamic performance and structural analysis of the centrifugal compressor impeller. The performance characteristics of the impeller are analyzed with and without splitter blades by varying the total number of main and splitter blades. The operating conditions of the compressor under centrifugal force and pressure load from the aerodynamic analysis are applied to the impeller blade and hub to perform the one-way Fluid–Structure Interaction (FSI). For the stress assessment, maximum equivalent von Mises stresses in the impeller blades are compared with the max

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22

Bae, Sung-Youl, and Yun-Hae Kim. "Structural design and analysis of large wind turbine blade." Modern Physics Letters B 33, no. 14n15 (2019): 1940032. http://dx.doi.org/10.1142/s0217984919400323.

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This paper presents a new design procedure for large wind turbine blades, which can be used in various case studies. The structural design of 2MW CFRP blade was performed using a verified 2MW GFRP blade model. The structural integrity assessment of the CFRP model demonstrated that the design criteria for tip deformation, buckling failure, and laminate failure in normal wind turbine operating conditions were met. The existing aero-elastic analysis code was not used to estimate the blade load, but the blade’s surface pressure was calculated using CFD. The conventional load analysis code necessit

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23

Chuang, Zhenju, Lulin Xia, Yan Qu, Wenhua Li, and Jiawen Li. "Investigation of Structural Nonlinearity Effects on the Aeroelastic and Wake Characteristics of a 15 MW Wind Turbine." Journal of Marine Science and Engineering 13, no. 1 (2025): 116. https://doi.org/10.3390/jmse13010116.

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As wind turbines increase in size, blades become longer, thinner, and more flexible, making them more susceptible to large geometric nonlinear deformations, which pose challenges for aeroelastic simulations. This study presents a nonlinear aeroelastic model that accounts for large deformations of slender, flexible blades, coupled through the Actuator Line Method (ALM) and Geometrically Exact Beam Theory (GEBT). The accuracy of the model is validated by comparing it with established numerical methods, demonstrating its ability to capture the bending–torsional coupled nonlinear characteristics o

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24

Lian, Xiaolong, Bo Zhou, Chuan Wang, Bin Li, Yingju Pei, and Qiyu Dong. "Study on hydraulic characteristics and internal flow mechanism of composite blade disc pump." Journal of Physics: Conference Series 2256, no. 1 (2022): 012015. http://dx.doi.org/10.1088/1742-6596/2256/1/012015.

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Abstract Disc pump is widely used in difficult-pump-medium transportation such as petroleum and chemical industry. Discontinuous blade impellers play an important role in the passability and energy efficiency of disk pump. The research of design and internal flow mechanism are particularly important. Based on the structural characteristics and the internal flow mechanism of the original model, the improved design of the blade structure is carried out. Through the experimental verification and the numerical analysis of multiple working conditions, the influence law of the new composite blade on

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25

Wang, Xu Dong, Li Cun Wang, Xian Ming Zhang, and Jun Feng. "Flexible and Vibration Characteristics Simulation for the Large Megawatt Size Wind Turbine Blades." Advanced Materials Research 217-218 (March 2011): 363–67. http://dx.doi.org/10.4028/www.scientific.net/amr.217-218.363.

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In the development of new large megawatt size wind turbines, aerodynamic and structural reserch is interesting and important for study wind turbine performace and boost the development of wind power. In this paper, the aerodynamic and aeroelastic characteristic of blades is investigated and presented based on Blade Element Momentum and Hamilton theory. Then the flexible characteristics of balde is researched with the aerodynamic and aeroelastic model of the rotor. The flapwise and edgewise displacements, velocities and accelerations of blade tip are simulated and plotted to validate the model

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26

Li, Linling, and Qibai Huang. "Research on the Mechanism of Fan Blade Shape Effect on its Noise." Journal of Low Frequency Noise, Vibration and Active Control 24, no. 1 (2005): 59–69. http://dx.doi.org/10.1260/0263092054037720.

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The fan blade configuration affects its efficiency and sound pressure level—(SPL). This paper analyzes the fan blade noise components and studies the aerodynamic characteristics of fan blades. The bar theory and moving soundfield characteristics are used in the theoretical analysis. Nonlinear aerodynamics theory is used to analyze the blade force. A mathematical model of fan blade noise is developed and simulated by the precision Gauss-Legendre method. The model simulation and the experiment results are analyzed in the frequency domain. The simulation results are in reasonable agreement with t

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27

Гребеников, А. Г., Ю. В. Дьяченко, В. В. Коллеров та ін. "АНАЛІЗ КОНСТРУКТИВНО-ТЕХНОЛОГІЧНИХ ОСОБЛИВОСТЕЙ ЛОПАТЕЙ НЕСУЧИХ ГВИНТІВ ВАЖКИХ ТРАНСПОРТНИХ ВЕРТОЛЬОТІВ". Open Information and Computer Integrated Technologies, № 93 (19 листопада 2021): 59–103. http://dx.doi.org/10.32620/oikit.2021.93.04.

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The analysis of the design and technological features of the rotor blades of heavy transport helicopters is carried out. The main performance characteristics of heavy helicopters are presented. General requirements to helicopter main rotor blades design and specifications for their production are formulated. The design and force diagram of heavy helicopter main rotor blades is considered. The features of structural materials for the main rotor blades of heavy transport helicopters are marked. The main rotor blades differ in their design due to different approaches to materials, manufacturing a

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28

Elbeji, Tarek, Wael Ben Amira, Khaled Souaissa, Moncef Ghiss, Hatem Bentaher, and Nabil Ben Fredj. "Three-Dimensional Aeroelastic Investigation of a Novel Convex Bladed H-Darrieus Wind Turbine Based on a Two-Way Coupled Computational Fluid Dynamics and Finite Element Analysis Approach." Fluids 10, no. 1 (2025): 17. https://doi.org/10.3390/fluids10010017.

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H-Darrieus vertical-axis wind turbines (VAWTs) capture wind regardless of its direction and operate effectively even in challenging and turbulent wind conditions. As a result, the blades operate under erratic and intricate aerodynamic loads, which cause them to bend. The performance of the H-Darrieus rotor will therefore be impacted by the blade’s deflection. This study aims at investigating the dynamic aerostructure influence on a novel convex-bladed H-Darrieus geometry. The results are compared to a straight-bladed baseline rotor. To do so, a two-way fluid–structure interaction (FSI)-coupled

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29

Shi, Lijian, Changxin Wu, Li Wang, et al. "Influence of Blade Angle Deviation on the Hydraulic Performance and Structural Characteristics of S-Type Front Shaft Extension Tubular Pump Device." Processes 10, no. 2 (2022): 328. http://dx.doi.org/10.3390/pr10020328.

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When the axial-flow pump is running, the blade angle is not fully adjusted or there are errors in the manufacture of the blades, which will lead to inconsistent blade placement angles during operation, and which will reduce the efficiency of the axial-flow pump. This paper uses the research methods of numerical simulation and model experiments to analyze the hydraulic performance and impeller structure characteristics of each flow components under different schemes when the angles of each blade of the S-type front shaft extension tubular pump device are inconsistent. The research phenomenon is

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30

Zhao, Tianyu, Yuxuan Wang, Xinze Cui, and Xin Wang. "Analytical Solution for Forced Vibration Characteristics of Rotating Functionally Graded Blades under Rub-Impact and Base Excitation." Materials 15, no. 6 (2022): 2175. http://dx.doi.org/10.3390/ma15062175.

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This paper presents an analytical investigation on the forced vibration characteristics of a rotating functionally graded material (FGM) blade subjected to rub-impact and base excitation. Based on the Kirchhoff plate theory, the rotating blade is modelled theoretically. The material properties of the FGM blade are considered to vary continuously and smoothly along the thickness direction according to a volume fraction power-law distribution. By employing Hamilton’s principle, the equations of motion are derived. Then, the Galerkin method and the small parameter perturbation method are utilized

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31

Liu, Chengming, Haiqiang Luo, Guiyu Wang, Xiaobin Chen, Lingjiu Zhou, and Zhengwei Wang. "Study on Structure Dynamic Characteristics for Internal Components of Kaplan Turbine Runner under Different Contact Modes." Processes 12, no. 6 (2024): 1061. http://dx.doi.org/10.3390/pr12061061.

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The stress and fatigue of the runner during the operation of the large Kaplan turbine are one of the key issues in the operation of turbines. Due to the complexity of the working load and the geometric configuration of the Kaplan turbine runner, the different contact modes between the internal components of the runner will have an impact on the stress and fatigue results. Therefore, the unsteady CFD calculation of the full channel is conducted in this article to analyze the hydraulic characteristics of the turbine blades in the unsteady flow field, such as pressure and torque. The pressure loa

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32

HUYNH, THANH NGOC, TOẢN QUỐC TRẦN, and QUYẾT THÀNH PHẠM. "Research on aerodynamic characteristics through airflow clearances in compressor blades of gas turbine engine." Science & Technology Development Journal - Engineering and Technology 3, SI3 (2020): first. http://dx.doi.org/10.32508/stdjet.v3isi3.640.

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Reducing the loss in the airflow clearance among the compressor blades of the rotor disk and stationary blades (guide vanes) is an urgent issue. Furthermore, additional losses of airflow through the clearances among the blades and airfoil losses are the main cause of reducing the efficiency of an axial flow compressor, especially the blade height is small. With a view towards the efficiency improvement of a multistage axial compressor with a high-pressure ratio, it is necessary to manufacture a highly economical compressor with a variety of compression stages. Airflow in the circulation cleara

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33

Chen, Yiming, Rongsheng Zhu, Yonggang Lu, Zhenjun Gao, and Junjun Kang. "Study on Flow Field and Rotor Safety Characteristics of MSPs Based on Flow Thermo-Coupling." Processes 7, no. 10 (2019): 711. http://dx.doi.org/10.3390/pr7100711.

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In order to obtain the structural intensity under the operation conditions of MSP (molten salt pump), the rotor component of MSP is taken as the research object. In this paper, the influence of material properties change on the structural performance of MSP at different temperatures is analyzed. The stress distribution and strain distribution of MSP rotor components under different loads are investigated, and the intensity calculation of MSP rotor system is carried out to explore whether it meets the intensity requirements under high temperature operation, which lays a foundation for the high

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34

Yang, Zhenya, and Chaofeng Li. "Influence of Fir-Tree Tenon Blade Parameters on Blade Dynamic Characteristics." Shock and Vibration 2023 (June 17, 2023): 1–19. http://dx.doi.org/10.1155/2023/5553183.

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In this paper, based on the theory of elastic structure analysis, considering the rotational softening and centrifugal stiffening of the blade, the dynamic model of the fir-tree rotating blade and the macroslip hysteresis model of the dry friction on the contact surface of fir-tree tenon are established. Based on elastic mechanics, the pressure distribution model of fir-tree tenon is innovatively established and the relationship between fit clearance and contact pressure has been derived. After the blade is discretized by the finite element method, the dynamic equation of the blade is solved i

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35

Ari, Muhamad, Yoyok Setyo Hadiwidodo, and Mukhtasor. "Evaluating Mechanical Strength in Vertical-Axis Tidal Turbines: A Comparative Study of Internal Blade Structure and Material Selection through CFD Simulation." E3S Web of Conferences 473 (2024): 03004. http://dx.doi.org/10.1051/e3sconf/202447303004.

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Due to the density of water, tidal turbine blades are subject to significantly greater stresses than wind turbine blades. Multiple blade failures occurred during prototype testing as a result of loading conditions and protracted exposure to seawater, which created a severe work environment. The structural integrity of tidal turbine blades is essential for long-term reliability and performance. Numerous investigations into structural performance have been conducted. However, previous research has centred on horizontal-axis tidal turbines, while research on small-scale vertical-axis tidal turbin

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van Rijswijk, K., S. Joncas, H. E. N. Bersee, O. K. Bergsma, and A. Beukers. "Sustainable Vacuum-Infused Thermoplastic Composites for MW-Size Wind Turbine Blades—Preliminary Design and Manufacturing Issues." Journal of Solar Energy Engineering 127, no. 4 (2005): 570–80. http://dx.doi.org/10.1115/1.2037107.

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This paper addresses the feasibility of using innovative vacuum infused anionic polyamide-6 (PA-6) thermoplastic composites for MW-size wind turbine blades structures. To compare the performance of this fully recyclable material against commonly used less sustainable thermoset blade materials in a baseline structural MW-size blade configuration (box-spar/skins), four different blade composite material options were investigated: Glass/epoxy, carbon/epoxy, glass/PA-6, and carbon/PA-6. Blade characteristics such as weight, costs, and natural frequencies were compared for rotor blades ranging betw

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Dalli, Uğbreve;ur, and Şcedilefaatdin Yüksel. "Identification of Flap Motion Parameters for Vibration Reduction in Helicopter Rotors with Multiple Active Trailing Edge Flaps." Shock and Vibration 18, no. 5 (2011): 727–45. http://dx.doi.org/10.1155/2011/675791.

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An active control method utilizing the multiple trailing edge flap configuration for rotorcraft vibration suppression and blade loads control is presented. A comprehensive model for rotor blade with active trailing edge flaps is used to calculate the vibration characteristics, natural frequencies and mode shapes of any complex composite helicopter rotor blade. A computer program is developed to calculate the system response, rotor blade root forces and moments under aerodynamic forcing conditions. Rotor blade system response is calculated using the proposed solution method and the developed pr

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Algolfat, Amna, Weizhuo Wang, and Alhussein Albarbar. "The Sensitivity of 5MW Wind Turbine Blade Sections to the Existence of Damage." Energies 16, no. 3 (2023): 1367. http://dx.doi.org/10.3390/en16031367.

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Due to the large size of offshore wind turbine blades (OWTBs) and the corrosive nature of salt water, OWTs need to be safer and more reliable that their onshore counterparts. To ensure blade reliability, an accurate and computationally efficient structural dynamic model is an essential ingredient. If damage occurs to the structure, the intrinsic properties will change, e.g., stiffness reduction. Therefore, the blade’s dynamic characteristics will differ from those of the intact ones. Hence, symptoms of the damage are reflected in the dynamic characteristics that can be extracted from the damag

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Martynenko, Volodymyr. "METHODS OF THE DYNAMIC BEHAVIOR MODELLING, THE STRENGTH ASSESSMENT AND THE STRUCTURAL STABILITY EVALUATION OF COMPOSITE BLADES OF ROTARY MACHINES." Bulletin of the National Technical University «KhPI» Series: Dynamics and Strength of Machines, no. 2 (December 24, 2024): 3–15. https://doi.org/10.20998/2078-9130.2024.2.314978.

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The work considers methods of joining and analysis of composite blades of rotary machines, namely options for connecting metal and composite parts, approaches to creating a calculation model and modeling the static and dynamic mechanical behavior of composite blades, and techniques of determining their strength according to various criteria, taking into account the characteristics of connections. For this purpose, a detailed review of the applications of composite blades in rotary machines for various purposes, available in the literature, was carried out, as well as options for combining comp

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Wu, Zonghao, Kai Wang, Tianyu Jie, and Xiaodi Wu. "Coupled Dynamic Characteristics of a Spar-Type Offshore Floating Two-Bladed Wind Turbine with a Flexible Hub Connection." Journal of Marine Science and Engineering 12, no. 4 (2024): 547. http://dx.doi.org/10.3390/jmse12040547.

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To reduce manufacturing, transportation, lifting and maintenance costs of increasingly larger and larger floating wind turbines, a Spar-type floating two-bladed wind turbine based on the 5 MW OC3-Hywind floating wind turbine model from the National Renewable Energy Laboratory (NREL) is studied in this paper. The two-bladed wind turbine can cause serious problems with large dynamic loads, so a flexible hub connection was introduced between the hub mount and nacelle carrier to alleviate the dynamic effect. The paper focuses on studying the dynamic responses of the proposed Spar-type floating two

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Sanliturk, K. Y., D. J. Ewins, R. Elliott, and J. S. Green. "Friction Damper Optimization: Simulation of Rainbow Tests." Journal of Engineering for Gas Turbines and Power 123, no. 4 (1999): 930–39. http://dx.doi.org/10.1115/1.1391278.

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Friction dampers have been used to reduce turbine blade vibration levels for a considerable period of time. However, optimal design of these dampers has been quite difficult due both to a lack of adequate theoretical predictions and to difficulties in conducting reliable experiments. One of the difficulties of damper weight optimization via the experimental route has been the inevitable effects of mistuning. Also, conducting separate experiments for different damper weights involves excessive cost. Therefore, current practice in the turbomachinery industry has been to conduct so-called “rainbo

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Zhou, Peng Zhan, and Fang Sheng Tan. "Stress Characteristics Analysis on a Composite Wind Turbine Blade." Advanced Materials Research 602-604 (December 2012): 111–14. http://dx.doi.org/10.4028/www.scientific.net/amr.602-604.111.

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The stress characteristics on a composite wind turbine blade are analyzed by using a finite element method. The whole stress level of the spar cap and the blade root is higher than that of the shear web and the airfoil plate, so the spar cap and the blade root are the main force-supporting parts. If the stress concentration point on the interface corner between the blade root and the shear web is neglected, the stress of the spar cap is higher than that of the blade root, and its maximum stress and mean stress are 211 MPa and 180 MPa respectively. The maximum stress of the blade is only 34.8%

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Xu, Lei. "A Study on the Structural Characteristics of the Blades of Wind Turbines under Static Load Condition." Journal of Physics: Conference Series 2474, no. 1 (2023): 012043. http://dx.doi.org/10.1088/1742-6596/2474/1/012043.

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Abstract The study of the structural strength and stiffness of wind turbine blades is an important foundation and guarantee for analyzing the stability and reliability of the complete wind turbine. By analyzing the results of static load experiments and finite element calculation, the stress, strain and deflection of blades can be more precisely determined so as to assess the structural characteristics of blades. We conducted static load tests on the medium-size experimental blades developed by the Institute of Engineering Thermophysics, Chinese Academy of Sciences, and obtained the deflection

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Jones, D. I. G., and A. Muszynska. "Structural Modification of Advanced Turbomachine Blading by Dynamic Stiffness Matrix Operations." Journal of Vibration and Acoustics 110, no. 4 (1988): 450–55. http://dx.doi.org/10.1115/1.3269549.

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This paper examines the application of matrix transformations from the experimentally obtained receptance matrix to the dynamic stiffness matrix to determine changes of blade stiffness and/or mass characteristics which will achieve desired modifications of blade dynamic behavior. Results for a specific turbine blade configuration are used to illustrate the approach.

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Bai, Yalei, and Donglei Wu. "Study on Fatigue Characteristics of Axial-Flow Pump Based on Two-Way Fluid–Structure Coupling." Energies 15, no. 23 (2022): 8965. http://dx.doi.org/10.3390/en15238965.

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When an axial-flow pump is running, there is a very complex flow inside the runner. Based on the two-way fluid–structure coupling method, this paper simulated the forward and reverse operating conditions of an axial-flow pump and calculated the dynamic stress distribution on the blade surface. The stress load spectrum was loaded onto the blade, and fatigue characteristic analysis was carried out to obtain the fatigue life and damage of the blade. This research shows the following: under different working conditions, the dynamic stress is concentrated at the root of the blade, and its amplitude

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Yu, Guorui, Xiaobin Li, and Wenjun Huang. "Performance and Damage Study of Composite Rotor Blades under Impact." Polymers 16, no. 5 (2024): 623. http://dx.doi.org/10.3390/polym16050623.

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A military helicopter is easily attacked by bullets in a battlefield environment. The composite blade is the main lifting surface and control surface of the helicopter. Its ballistic performance directly determines the vulnerability and survivability of the helicopter in the battlefield environment. To study the ballistic performance of the composite helicopter blade, the damage characteristics of the impacted composite rotor blade are obtained by experiments. A numerical simulation model is established by applying Abaqus software to predict the blade ballistic damage. The three-dimensional pr

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Kumar, M. Rohin, and C. Venkatesan. "Effects of blade configuration parameters on helicopter rotor structural dynamics and whirl tower loads." Aeronautical Journal 120, no. 1224 (2016): 271–90. http://dx.doi.org/10.1017/aer.2015.11.

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ABSTRACTThe influence of the blade geometric parameters on the structural dynamic characteristics, response and loads of a helicopter rotor under hover condition in a whirl tower was investigated. A general geometry was considered for the rotor blade which included configuration parameters like root offset, torque offset, pre-twist, pre-cone, pre-droop, pre-sweep, tip-sweep and tip-anhedral. The option of placing concentrated masses at any location on the blade was also included. Natural frequencies and the corresponding mode shapes of the rotating blade were obtained by solving the linear, un

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Muyan, Can, and Demirkan Coker. "Finite element simulations for investigating the strength characteristics of a 5 m composite wind turbine blade." Wind Energy Science 5, no. 4 (2020): 1339–58. http://dx.doi.org/10.5194/wes-5-1339-2020.

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Abstract. Full-scale structural tests enable us to monitor the mechanical response of the blades under various loading scenarios. Yet, these tests must be accompanied by numerical simulations so that the physical basis of the progressive damage development can be better interpreted and understood. In this work, finite element analysis is utilized to investigate the strength characteristics of an existing 5 m RÜZGEM composite wind turbine blade under extreme flapwise, edgewise and combined flapwise plus edgewise loading conditions. For this purpose, in addition to a linear buckling analysis, Pu

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Belan, Juraj, Lenka Kuchariková, Magdalena Mazur, Eva Tillová, and Patrícia Hanusová. "The Quality Assurance of Cast and Wrought Aero Jet Engine Components Made from Ni-base Superalloys with Using of Quantitative Metallography Methods and Alloys Lifetime Prediction." Quality Production Improvement - QPI 1, no. 1 (2019): 222–29. http://dx.doi.org/10.2478/cqpi-2019-0030.

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Abstract The Ni-base superalloys are used in the aircraft industry for the production of aero engine most stressed parts, turbine blades or turbine discs. Quality of aero jet engine components has a significant influence on the overall lifetime of a jet engine as itself as well as the whole airplane. From this reason a dendrite arm spacing, grain size, morphology, number and value of γ′-phase are very important structural characteristics for blade or discs lifetime prediction. The methods of quantitative metallography are very often used for evaluation of structural characteristics mentioned a

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Bezjazychnyj, V. F., K. A. Vinogradov, and O. V. Vinogradova. "DETERMINATION OF GEOMETRICAL PARAMETERS OF GAS TURBINE BLADES BASED ON COORDINATE MEASUREMENT BY STRUCTURAL AND PARAMETRIC ANALYSIS METHODS." Spravochnik. Inzhenernyi zhurnal, no. 277 (April 2020): 31–37. http://dx.doi.org/10.14489/hb.2020.04.pp.031-037.

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A method for determining the parameters of the turbine blades geometry (angles of the inlet and outlet edges, thickness, etc.), as well as the coordinates of the centers of gravity of the blades (height) according to the coordinate measurements of the profiles is proposed. These parameters are used to evaluate the gas-dynamic efficiency of the blade row and the strength characteristics of the turbine blades on the basis of one-dimensional and two-dimensional models widely used in engineering practice.

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