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Multi-solution pipe-routing method for the aeroengine with route constraints based on multi-objective optimization

Frontiers of Mechanical Engineering 2024年第6期19卷 1-14页

作者： Feiyang FANG Jiapeng YU Jikuan XIONG Binjun GE Jiaqi ZHU Hui MA School of Mechanical Engineering and Automation Northeastern UniversityShenyang 110819China Key Laboratory of Vibration and Control of Aero-Propulsion System(Ministry of Education) Northeastern UniversityShenyang 110819China

The complexity of aeroengine external piping systems necessitates the implementation of automated design processes to reduce the duration of the design ***,existing routing algorithms often fail to meet designer requirements because of the limitations in providing a single solution and the inadequate consideration for route *** this study,we propose the multi-solution pipe-routing method for *** method utilizes a hybrid encoding approach by incorporating fixed-length encoding to represent route constraints and variable-length encoding and indicate free-exploration *** approach enables designers to specify route constraints and iterate over the appropriate number of control points by employing a modified genetic iteration mechanism for variable-length ***,we employ a pipe-shaped clustering niche method to enhance result *** practicability of the newly proposed method is confirmed through comparative experiments and simulations based on the“aeroPiping”system developed on Siemens *** solutions demonstrate significant differences in circumferential and axial orientations while still satisfying engineering constraints.

关键词： aeroengine multi-solution pipe-routing niche method hybrid swarm optimization multi-objective optimization particle swarm optimization

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Effect of planet pin position errors on the fatigue reliability of large aviation planetary systems

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Frontiers of Mechanical Engineering 2024年第5期19卷 129-152页

作者： Ming LI Zhixuan YANG Liyang XIE School of Mechatronics Engineering Shenyang Aerospace UniversityShenyang 110136China Key Laboratory of Vibration and Control of Aero-Propulsion System(Ministry of Education) Northeastern UniversityShenyang 110819China

Planet pin position errors significantly affect the mechanical behavior of planetary transmissions at both the power-sharing level and the gear tooth meshing level,and its tolerance properties are one of the key design elements that determine the fatigue reliability of large aviation planetary *** dangerous stress response of planetary systems with error excitation is analyzed according to the hybrid finite element method,and the weakening mechanism of large-size carrier flexibility to this error excitation is also *** the simulation and analysis process,the Monte Carlo method was combined to take into account the randomness of planet pin position errors and the coupling mechanism among the error individuals,which provides effective load input information for the fatigue reliability evaluation model of planetary *** addition,a simulation test of gear teeth bending fatigue intensity was conducted using a power flow enclosed gear rotational tester,providing the corresponding intensity input information for the reliability ***,under the framework of stress-intensity interference theory,the computational logic of total formula is extended to establish a fatigue reliability evaluation model of planetary systems that can simultaneously consider the failure correlation and load bearing time-sequence properties of potential failure units,and the mathematical mapping of planet pin positional tolerance to planetary systems fatigue reliability was developed based on this ***,the upper limit of planet pin positional tolerance zone can be determined at the early design stage according to the specific reliability index requirements,thus maximizing the balance between reliability and economy.

关键词： planetary transmission manufacturing error system reliability tooth-root stress hybrid finite element gear test

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Nonlinear stress analysis of aero-engine pipeline based on semi-analytical method

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Applied Mathematics and Mechanics(English Edition) 2025年第3期46卷 521-538页

作者： Weijiao CHEN Xiaochi QU Ruixin ZHANG Xumin GUO Hui MA Bangchun WEN School of Mechanical Engineering and Automation Northeastern UniversityShenyang 110819China Key Laboratory of Vibration and Control of Aero-Propulsion Systems Ministry of Education of China Northeastern UniversityShenyang 110819China

Fatigue failure caused by vibration is the most common type of pipeline *** core of this research is to obtain the nonlinear dynamic stress of a pipeline system accurately and efficiently,a topic that needs to be explored in the existing *** shell theory can better simulate the circumferential stress distribution,and thus the Mindlin-Reissner shell theory is used to model the *** this paper,the continuous pipeline system is combined with clamps through modal expansion for the first time,which realizes the coupling problem between a shell and a *** the Bouc-Wen model is used to simulate the nonlinear external force generated by a clamp,the nonlinear coupling characteristics of the system are effectively ***,the dynamic equation of the clamp-pipeline system is established according to the Lagrange energy *** on the resonance frequency and stress amplitude obtained from the experiment,the nonlinear parameters of the clamp are identified with the semi-analytical method(SAM)and particle swarm optimization(PSO)*** study provides a theoretical basis for the clamp-pipeline system and an efficient and universal solution for stress prediction and analysis of pipelines in engineering.

关键词： pipeline modeling stress analysis nonlinear-clamp support nonlinear vibration

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The semi-analytical modeling and vibration reduction analysis of the cylindrical shell with piezoelectric shunt damping patches

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Applied Mathematics and Mechanics(English Edition) 2023年第10期44卷 1675-1700页

作者： Dongxu DU Jun YANG Wei SUN Hongwei MA Kunpeng XU School of Mechanical Engineering and Automation Northeastern UniversityShenyang 110819China Key Laboratory of Vibration and Control of Aero-Propulsion Systems of Ministry of Education of China Northeastern UniversityShenyang 110819China

By considering electromechanical coupling, a unified dynamic model of the cylindrical shell with the piezoelectric shunt damping patch(PSDP) is created. The model is universal and can simulate the vibration characteristic of the shell under different states including the states in which PSDP cannot be connected, partially connected, and completely connected to the shunt circuit. The equivalent loss factor and elastic modulus with frequency dependence are proposed to consider the electrical damping effect of resistance shunt circuits. Moreover, the semi-analytical dynamic equation of the cylindrical shell with PSDP is derived by the Lagrange equation. An experimental test is carried out on the cylindrical shell with PSDP to verify the vibration suppression ability of PSDP on the cylindrical shell and the correctness of the proposed model. Furthermore, the parameter analysis shows that determining the appropriate resistance value in the shunt circuit can achieve a good vibration suppression effect.

关键词： cylindrical shell vibration reduction analysis piezoelectric shunt semianalytical modeling experimental study

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Theoretical and experimental investigations on an X-shaped vibration isolator with active controlled variable stiffness

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Applied Mathematics and Mechanics(English Edition) 2024年第8期45卷 1371-1386页

作者： Zeyu CHAI J.T.HAN Xuyuan SONG Jian ZANG Yewei ZHANG Zhen ZHANG College of Aerospace Engineering Shenyang Aerospace UniversityShenyang 110136China Jacobs School of Engineering University of California San DiegoSan Diego CA 92122U.S.A. Key Laboratory of Vibration and Control of Aero-Propulsion System Ministry of EducationNortheastern UniversityShenyang 110819China

A novel X-shaped variable stiffness vibration isolator(X-VSVI)is *** Runge-Kutta method,harmonic balance method,and wavelet transform spectra are introduced to evaluate the performance of the X-VSVI under various *** layer number,the installation angle of the X-shaped structure,the stiffness,and the active control parameters are systematically *** addition,a prototype of the X-VSVI is manufactured,and vibration tests are carried *** results show that the proposed X-VSVI has a superior adaptability to that of a traditional X-shaped mechanism,and shows excellent vibration isolation performance in response to different amplitudes and forms of ***,the vibration isolation efficiency of the device can be improved by appropriate adjustment of parameters.

关键词： bionic vibration isolation X-shaped structure variable stiffness structure nonlinear dynamics prototype experiment

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Influence of Non-uniform Parameter of Bolt Joint on Complexity of Frequency Characteristics of Cylindrical Shell

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Chinese Journal of Mechanical Engineering 2023年第2期36卷 206-219页

作者： Qiansheng Tang Houxin She Chaofeng Li Bangchun Wen School of Engineering Anhui Agricultural UniversityHefei 230036China School of Mechanical Engineering and Automation Northeastern UniversityShenyang 110819China Key Laboratory of Vibration and Control of Aero‑Propulsion System Ministry of EducationNortheastern UniversityShenyang 110819China

Bolt connection is one of the main fixing methods of cylindrical shell structures.A typical bolted connection model is considered as a tuned ***,in the actual working conditions,due to the manufacturing error,installation error and uneven materials of bolts,there are always random errors between different *** investigate the influence of non-uniform parameters of bolt joint,including the stiffness and the distribution position,on frequency complexity characteristics of cylindrical shell through a statistical method is the main aim of this *** bolted joints considered here were simplified as a series of springs with random *** vibration equation of the bolted joined cylindrical shell was derived based on Sanders’thin shell *** Monte Carlo simulation and statistical theory were applied to the statistical analysis of mode characteristics of the ***,the frequency and mode shape of the tuned system were investigated and compared with ***,the effect of the random distribution and the random constraint stiffness of the bolts on the frequency and mode shape were *** the statistical analysis on the natural frequencies was evaluated for different mistuned *** some special cases were presented to help understand the effect of random *** research introduces random theory into the modeling of bolted joints and proposes a reference result to interpret the complexity of the modal characteristics of cylindrical shells with non-uniform parameters of bolt joints.

关键词： Bolted joint Random mistuning Shell vibration Mode shape Statistical analysis

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Improved frequency modeling and solution for parallel liquid-filled pipes considering both fluid-structure interaction and structural coupling

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Applied Mathematics and Mechanics(English Edition) 2022年第8期43卷 1269-1288页

作者： Xumin GUO Chunliang XIAO Hui MA Hui LI Xufang ZHANG Bangchun WEN School of Mechanical Engineering and Automation Northeastern UniversityShenyang110819China Key Laboratory of Vibration and Control of Aero-Propulsion System Ministry of Education Northeastern UniversityShenyang110819China

The dynamic characteristics of a single liquid-filled pipe have been broadly studied in the previous *** parallel liquid-filled pipe(PLFP)system is also widely used in engineering,and its structure is more complex than that of a single ***,there are few reports about the dynamic characteristics of the ***,this paper proposes improved frequency modeling and solution for the PLFPs,involving the logical alignment principle and coupled matrix *** established model incorporates both the fluid-structure interaction(FSI)and the structural coupling of the *** validity of the established model is verified by modal *** effects of some unique parameters on the dynamic characteristics of the PLFPs are *** work provides a feasible method for solving the FSI of multiple pipes in parallel and potential theoretical guidance for the dynamic analysis of the PLFPs in engineering.

关键词： parallel liquid-filled pipe(PLFP) dynamic analysis improved frequency modeling and solution fluid-structure interaction(FSI) structure coupling

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Advances in Active Learning Kriging Surrogate Models for Reliability Assessment 9

Advances in Active Learning Kriging Surrogate Models for Rel...

引用

9th International Symposium on system Security, Safety, and Reliability, ISSSR 2023

作者： Zhao, Zhiqiang Xie, Liyang Zhao, Bingfeng Northeastern University Liaoning Shenyang China Key Laboratory of Vibration and Control of Aero-Propulsion System Ministry of Education Liaoning Shenyang China

ISBN: (纸本)9798350302479

Reliability assessment is an important link to ensure product quality. However, both the approximate analytical method and the simulation method have shortcomings in applicability. At present, active learning Kriging surrogate model has become a hot spot in reliability assessment methods owing to its high calculating effectiveness and accuracy. The composition and structure for the Kriging theories, the methods for samples generation, together with the theories related to active learning are described in detail. Several kinds of classical active learning Kriging algorithms are analyzed. This paper emphasizes the status of research on Kriging algorithms with active learning processes for solving small failure probability, system reliability, time-dependent reliability and hybrid variable problems. Finally, the development prospect of active learning Kriging algorithm is discussed. © 2023 IEEE.

关键词： Kriging

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Design and Performance Test of an H-shaped Bionic Piezoelectric Robot Based on the Standing Wave Principle

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Journal of Bionic Engineering 2025年第2期22卷 608-625页

作者： Ying Li Chaofeng Li Zhiwei Wu Binbin Zhu Jinghu Tang School of Mechanical Engineering and Automation Northeastern UniversityShenyang110819People’s Republic of China Key Laboratory of Vibration and Control of Aero-propulsion Systems Northeastern UniversityShenyang110819People’s Republic of China State Key Laboratory of Internet of Things for Smart City University of MacaoMacao999078People’s Republic of China

In this paper,inspired by the running motion gait of a cheetah,an H-shaped bionic piezoelectric robot(H-BPR)based on the standing wave principle is proposed and *** piezoelectric robot realizes linear motion,turning motion,and turning motion with different radi by the voltage differential driving method.A prototype with a weight of 38 g and dimensions of 150×80×31 mm^(3) was ***,the dynamics and kinematics of the piezoelectric robot were analyzed to obtain the trajectory of a point at the end of the piezoelectric robot *** motion principle of the piezo-electric robot was analyzed,and then the piezoelectric robot's modal analysis and harmonic response analysis were carried out using finite element analysis ***,an experimental setup was built to verify the effectiveness and high efficiency of the robot's motion,and the effects of frequency,voltage,load,and height of the driving leg on the robot's motion performance were *** performance test results show that the piezoelectric robot has a maximum veloc-ity of 66.79 mm/s at an excitation voltage of 320 V and a load capacity of 55 *** addition,the H-BPR with unequal drive legs has better climbing performance,and the obtained conclusions are informative for selecting leg heights for piezoelectric robots.

关键词： Piezoelectric Standing wave principle Bionic Differential driving method Robot

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Fault Detection Unknown Input Observer for Local Nonlinear Fuzzy Autonomous Ground Vehicles system Based on a Joint Peak-to-Peak Analysis and Zonotopic Analysis Threshold

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IEEE Transactions on Vehicular Technology 2025年第5期74卷 7226-7236页

作者： Li, Yi Dong, Jiuxiang Northeastern University State Key Laboratory of Synthetical Automation of Process Industries Shenyang110819 China Northeastern University College of Information Science and Engineering Shenyang110819 China Northeastern University Key Laboratory of Vibration and Control of Aero-Propulsion Systems Ministry of Education of China Liaoning Shenyang China

This paper focuses on the fault detection problem of local nonlinear fuzzy autonomous ground vehicles systems with disturbances by developing set membership estimation. The intractable influence of disturbances and local nonlinear part on the design of fault detection thresholds is the principal difficulty in fault detection using the existing set membership estimation methods. To this end, a fault detection unknown input observer via a novel joint peak-to-peak analysis and zonotopic analysis threshold is proposed. Firstly, the disturbances are divided into decouplable and non-decouplable parts. An unknown input observer, designed with peak-to-peak performance criteria, is employed to achieve the decoupling of the decouplable disturbance part. Subsequently, based on the dynamic structure of the observer, the local non-linear part is represented as polyhedra through peak-to-peak analysis and zonotopic analysis, thereby providing an interval estimation for the system output. his method utilizes zonotopic analysis to mitigate the over-estimation issue in the initial stage inherent in traditional peak-to-peak performance-based interval estimation techniques. Furthermore, it retains the necessary degrees of freedom during the decoupling process of certain disturbances to optimize the observer's performance. Consequently, this approach significantly enhances the accuracy of the interval estimation as compared to existing methods. Moreover, the peak-to-peak performance of fault detection unknown input observer is analysed using the fuzzy basis-dependent Lyapunov function to decrease the conservatism. Lastly, simulations are analysed in order to validate the accuracy of the proposed thresholds. © 1967-2012 IEEE.

关键词： Lyapunov functions

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