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Dynamic modeling and vibration control evaluation of grid composite sandwich plates with TSVM and SMAs

Thin-Walled Structures 2025年 214卷

作者： Li, Hui Dai, Zhihan Qiao, Zhou Zhou, Jin Wang, Haijun Li, Kaixiang Zhang, Fei Cui, Hongbo Li, Jinghan Zhang, Haiyang Cao, Hang Wang, Xiangping Guan, Zhongwei School of Mechanical Engineering and Automation Northeastern University Shenyang110819 China Key Laboratory of Impact Dynamics on Aeroengine AECC Shenyang Engine Research Institute Shenyang110015 China Key Laboratory of Vibration and Control of Aero-Propulsion Systems Ministry of Education of China Northeastern University Shenyang110819 China School of Mechanical Engineering Xi'an Jiaotong University Xi'an710054 China Co. Ltd. Wuxi214000 China Aviation Science and Technology Key Laboratory of Aeronautical Acoustics and Vibration Intensity Aircraft Strength Research Institute Xi'an710065 China School of Mechanical Engineering Chengdu University Chengdu610106 United Arab Emirates

This paper proposes a novel dynamic model of a grid composite sandwich plate (GCSP) embedded with temperature sensitive viscoelastic material (TSVM) and shape memory alloys (SMAs), which consists of a grid functional core and two fiber-reinforced polymer skins. This core comprises a rectangular frame and several grid functional units (FUs), in which each FU is composed of a grid frame, tightened SMAs and a piece of TSVM to actively control stiffness and damping by adjusting the internal temperature. The dynamic equations are derived to solve the vibration parameters of the TSVM-SMAs-GCSP, with the recovery stress produced by SMAs in each FU and the temperature-dependent material parameters of TSVM being defined in advance. Furthermore, using a TSVM-SMAs-GCSP specimen with six FUs as an example, the preparation method is illustrated. To validate the proposed model and active control performance, vibration tests with varying control temperatures and zones of FUs are conducted on this specimen, employing impact hammer, swept-sine excitation, and both non-resonant and resonant excitation techniques. Finally, the influences of critical structural and control parameters on natural frequencies, damping ratios and resonant responses are evaluated, with valuable suggestions being summarized to highlight the active control capability of such a structure. © 2025 Elsevier Ltd

关键词： Damping

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Film cooling effectiveness in the presence of internal hole random roughness: A comprehensive analysis

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International Communications in Heat and Mass Transfer 2025年 165卷

作者： Wang, Xinyu Ye, Lin Li, Wei Zheng, Tianyi Liang, Xiyuan Liu, Cunliang School of Power and Energy Northwestern Polytechnical University Shaanxi Xi'an710129 China State Key Laboratory for Strength and Vibration of Mechanical Structures Xi'an Jiaotong University Shaanxi Xi'an710049 China Science and Technology on Altitude Simulation Laboratory Sichuan Mianyang621000 China Hunan Aviation Powerplant Research Institute Aero Engine Corporation of China Hunan Zhuzhou412002 China

Film cooling, with its excellent cooling performance, is widely applied in the active thermal protection design of aerospace propulsion systems. However, during manufacturing and service, film holes are affected by drilling processes and particle deposition, leading to significant deviations between the actual cooling structures and the original design. These deviations primarily manifest as hole blockage and increased surface roughness, which may cause cooling degradation. Therefore, it is essential to investigate the film cooling performance under structural damage and the jet-mainstream mixing mechanisms of damaged holes. This study focuses on internal roughness as a form of structural damage by investigating three levels of hole roughness—Ra = 3.1 μm (Film hole I), Ra = 35.9 μm (Film hole II), and Ra = 64.9 μm (Film hole III). The selected roughness levels and blowing ratios correspond to the practical range encountered in turbine cooling. The film cooling effectiveness distribution is measured using pressure-sensitive paint technology, and numerical simulations are conducted to analyze the flow field and support the experimental results. The results indicate that cooling degradation caused by internal roughness is mainly reflected in the reduction of high cooling effectiveness areas and the deterioration of cooling performance near the film hole exit. However, increased roughness also leads to an expansion of the film coverage in the spanwise, enhancing cooling performance downstream. Flow field analysis reveals that internal roughness increases the inhomogeneity of coolant velocity distribution inside the hole, strengthening the counter-rotating vortex pair and causing jet lift-off, which reduces the high cooling effectiveness area. Additionally, roughness-induced disturbances enhance turbulence intensity, promoting jet-mainstream mixing and increasing the overall film coverage. © 2025

关键词： Solar sails

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Microstructures and high-temperature self-lubricating wearresistance mechanisms of graphene-modified WC–12Co coatings

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Friction 2021年第2期9卷 315-331页

作者： Haoliang TIAN Changliang WANG Mengqiu GUO Yongjing CUI Junguo GAO Zhihui TANG Aviation Key Laboratory of Science and Technology on Advanced Corrosion and Protection for Aviation Material Beijing Aero Engine Corporation of China Beijing Institute of Aeronautical MaterialsBeijing 100095China

To reduce the friction coefficient of cobalt-cemented tungsten carbide(WC–12Co)wear-resistant coatings,graphene was compounded into WC–12Co powder via wet ball milling and spray *** and wear-resistant graphene coatings were prepared via detonation gun *** presence,morphologies,and phase compositions of graphene in the powders and coatings that are obtained through different powder preparation processes were *** analysis was performed using the following technologies:energy-dispersive X-ray-spectroscopy(EDXS),scanning electron microscopy(SEM),transmission electron microscopy(TEM),and Raman *** mechanical properties of the coatings were studied using a microhardness tester and a universal drawing *** friction and wear properties of the coatings were studied using an SRV-4 friction and wear *** results showed that the graphene content in the WC–12Co coating modified with graphene was higher than that without modification;graphene was embedded in the structure in a transparent and thin-layer *** adhesive strength of this coating at approximately 25°C was approximately 60.33 MPa,and the hardness was approximately 984 *** high-temperature treatment,the adhesive strength and hardness of the graphene oxide(GO)/WC–12Co coating decreased slightly(the lowest adhesive strength of 53.16 MPa was observed after treatment at 400°C,and the lowest hardness of approximately 837 HV0.3 was observed after treatment at 300°C).Compared to the friction coefficient(0.6)of the WC–12Co coating obtained at room temperature,the friction coefficient of the GO/WC–12Co coating was decreased by approximately 50%of that *** graphene-modified coating was continuously exposed to the wear tracks on the surface of the contacting materials during friction,and a lubricating film was formed in the microareas in which the wear tracks were *** coating exhibited improved self-lubricating and wear-resistant effects

关键词： graphene wear-resistant coating detonation gun spraying self-lubricating wear-resistance mechanism high-temperature friction

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Numerical investigation on flow and heat transfer characteristics of supercritical RP-3 in inclined pipe

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Chinese Journal of aeronautics 2019年第8期32卷 1885-1894页

作者： Zhi TAO Liangwei LI Jianqin ZHU Xizhuo HU Longyun WANG Lu QIU National Key Laboratory of Science and Technology on Aero-engine Aero-thermodynamics School of Energy and Power EngineeringBeihang UniversityBeijing 100083China College of Aeronautical Engineering Civil Aviation University of ChinaTianjin 300300China

Numerical simulations of flow and heat transfer to supercritical RP-3 through the inclined tubes have been performed using LS k–e model embedded in Fluent. The physical properties of RP-3 were obtained using the generalized corresponding state laws based on the fourcomponent surrogate model. Mass flow rate is 0.3 g/s, system pressure is 3 MPa, inlet temperature is 373 K. Inclination of the inclined pipe varied from -90° to 90°, with heat flux varied from 300 k W/m^2 to 400 kW/m^2. Comparison between the calculated result and the experimental data indicates the range of error reasonable. The results of ±45° show that temperature inhomogeneity in inclined pipe produce the secondary flow in its cross section due to the buoyancy force. Depending on the strength of the temperature inhomogeneity, there will be two different forms of secondary flow and both contribute to the convective heat transfer in the pipe. The secondary flow intensity decreases when the inhomogeneity alleviates and thermal acceleration will play a leading role. It will have a greater impact on the turbulent flow to affect the convective heat transfer in the pipe. When changing the inclination, it affects the magnitude of the buoyant component in flow direction. The angle increases, the buoyancy component decreases. And the peak temperature of wall dominated by the secondary flow will move forward and increase in height.

关键词： Heat transfer Hydrocarbon fuel Inclined pipe Supercritical pressure Variable properties

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Application of Correlation Analysis in the Stress Signals of the aero-engine Elastic Supporter 6th

Application of Correlation Analysis in the Stress Signals of...

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6th China aeronautical science and technology Conference, CASTC 2023

作者： Yang, Wei-Xin Liu, Fei-Chun Lei, Mo-Zhi China Aviation Powerplant Research Institute Zhuzhou China Aero-Engine Vibration Technology in Aeronautical Science Key Laboratory Zhuzhou China

ISBN: (纸本)9789819988662

A fault diagnosis method for rotor system of small and medium aero-engine is presented. In this method, a strain gauge is attached to the elastic support of the rotor system to obtain the dynamic stress signal of the elastic support in the working process. Combined with the respective advantages of EMD and PAC, the dynamic stress of the elastic support is firstly decomposed by EMD, and PCA is used to obtain the IMF principal component, and then the noise evaluation criteria is established by the correlation coefficient to eliminate the interfering principal component. Finally, the remaining principal component is reconstructed and the noise reduction signal is obtained. Practical application shows that this method can diagnose rotor system faults effectively. © 2024, Chinese Society of aeronautics and Astronautics.

关键词： aero-engine Correlation coefficient EMD PCA

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Three-dimensional neutron diffraction study of dendrite growth behavior in Ni-based single-crystal turbine blades

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Scripta Materialia 2025年 266卷

作者： Pucong Sheng Jiachen Long Nan Li Jingyi Zhou Yunsong Zhao Hao Lin Shengyi Zhong School of Materials Science and Engineering Shanghai Jiao Tong University Shanghai 200240 PR China SJTU Paris Elite Institute of Technology Shanghai Jiao Tong University Shanghai 200240 PR China AECC Beijing Institute of Aeronautical Materials PR China Beijing Key Laboratory of Aeronautical Materials Testing and Evaluation PR China Key Laboratory of Aeronautical Materials Testing and Evaluation Aero engine corporation of China PR China National Key Laboratory of Neutron Science and Technology PR China

Three-dimensional Neutron Diffraction (3DND) microscopy is performed using a monochromatic beam and applied for the first time to investigate the dendrite growth behavior in Ni-based single-crystal turbine blades. Leveraging the high penetration depth and non-destructive characterization capabilities of neutrons, 3DND provides a statistical analysis of crystallographic orientation distributions and stress states of single crystal at component level . In this study, lattice constants of both γ and γ' phases decrease progressively during dendritic growth, with γ phase exhibiting initial tensile strain that subsequently relaxed to zero. Misorientation analysis reveals a tilt misorientation reaching up to 5°, significantly larger than the twist of 1° Both types of misorientation increases as the dendrites develop, highlighting the anisotropic nature of microstructural evolution. These findings demonstrate the potential of 3DND for characterizing internal lattice strain, orientation distributions, and defect evolution in critical structural components, paving the way for improved manufacturing processes and material reliability.

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Application of a Method of Identifiying Instantaneous Shaft Speed from Spectrum in aeroengine vibration Analysis

Application of a Method of Identifiying Instantaneous Shaft ...

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2022 Global Reliability and Prognostics and Health Management Conference, PHM-Yantai 2022

作者： Li, Chuan Li, Jian Fang, Xing Long Tang, Yong Deng, Ting Lu, Yu AECC Hunan Aviation Powerplant Research Institute Zhu Zhou412002 China Aero-Engine Vibration Technology in Aeronautical Science Key Laboratory Zhu Zhou412002 China

ISBN: (数字)9781665496315

ISBN: (纸本)9781665496315

A novel and simple method to extract the instantaneous shaft velocity from the vibration signal. For a given vibration signal, the spectrum is first analyzed, and then the instantaneous shaft velocity is identified from the spectrum by the maximum tracking algorithm. Through the numerical integration of the instantaneous shaft velocity, the instantaneous phase is obtained and used for synchronous resampling in the digital domain, and then the subsequent synchronization analysis is carried out in the axial synchronous domain. A method of synchronous analysis of rotating machinery using only vibration signals is formed. An example of vibration response of aero-engine without rotational speed test is given, the practice shows that the instantaneous shaft velocity identified directly by the spectrogram can be used for synchronous sampling and subsequent periodic domain analysis and order domain analysis is feasible. © 2022 IEEE.

关键词： Velocity

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A Method of Extracting Shaft Speed Based on Ridge Tracking and Phase Demodulation 14

A Method of Extracting Shaft Speed Based on Ridge Tracking a...

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14th IEEE Global Reliability and Prognostics and Health Management Conference, PHM-Hangzhou 2023

作者： Li, Chuan Li, Jian Fang, Xinglong Lu, Yu Deng, Ting Hu, Tingxun AECC Hunan Aviation Powerplant Research Institute Zhu Zhou412002 China Aero-engine Vibration Technology in Aeronautical Science Key Laboratory Zhu Zhou412002 China

ISBN: (纸本)9798350301359

The synchronous acquisition of non-shaft phase reference is a process of synchronous acquisition in the digital domain by using the signal processing method to obtain the shaft speed from the vibration signal without speed. A method of extraction shaft speed based on ridge tracking and phase demodulation is introduced in this paper. The method comprehensively considers the characteristics of time-frequency method and demodulation method, and combines the two methods to extract the shaft speed of the vibration signal. In the process of vibration data processing, firstly, the cost function is used to track the target ridge, then the signal is initially sampled, and then the phase demodulation is used to get the instantaneous velocity from the resampled vibration data. An example is given to verify the effectiveness of the ridge tracking demodulation method and the accuracy of shaft speed extraction. © 2023 IEEE.

关键词： instantaneous shaft speed phase demodulation ridge tracking shaft speed loss vibration signal preprocessing

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Arrangement of signal measuring points of planetary gear transmission based on dynamics simulation 15

Arrangement of signal measuring points of planetary gear tra...

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15th IEEE Global Reliability and Prognostics and Health Management Conference, PHM-Beijing 2024

作者： Yang, Weixin Liu, Feichun Xin, Tang Zhu, Rupeng AECC Hunan Aviation Powerplant Research Institute Zhuzhou China Aero-engine vibration technology in Aeronautical Science Key Laboratory Zhuzhou China Nanjing University of Aeronautics and Astronautics Nanjing China

ISBN: (纸本)9798350354010

Planetary gear box has complex structure and high failure rate. How to effectively reveal the fault characteristics of the key components in the planetary gear box and find and solve the fault in time is the focus and difficulty of current research. This paper takes the planetary gear meshing system as the research object, combines multi-body dynamics and finite element analysis, considers the transmission path of vibration signals, establishes a rigid-flexible coupling model, analyzes the characteristics and causes of the vibration signals obtained by simulation, seeks the best measuring point position of the vibration acceleration sensor, and verifies the effectiveness of the simulation model through the measured signals. © 2024 IEEE.

关键词： Gear transmissions

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Fast Spectral Kurtosis Technique and its Application for Gearbox Fault Diagnosis 15

Fast Spectral Kurtosis Technique and its Application for Gea...

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15th IEEE Global Reliability and Prognostics and Health Management Conference, PHM-Beijing 2024

作者： Yang, Weixin Liu, Feichun Xin, Tang Zhu, Rupeng AECC Hunan Aviation Powerplant Research Institute Zhuzhou China Aero-engine Vibration Technology in Aeronautical Science Key Laboratory Zhuzhou China Nanjing University of Aeronautics and Astronautics Nanjing China

ISBN: (纸本)9798350354010

Because of the complexity of the motion of the gearbox, the vibration signal components are complex, and the amplitude and frequency modulation are very serious. However, the early fault characteristics are covered up or affected by the vibration response of other movements because they are very weak. Therefore, it is very difficult to separate the fault characteristic information directly from the original signal. To solve this problem, the fast spectral kurtosis technique introduced in this paper can enhance the weak signal and identify the early fault. © 2024 IEEE.

关键词： Frequency modulation

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