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View article: An Analysis on Negative Effects of Shaft Deflection on Angular Misalignment of Rollers Inside Tapered Roller Bearing
An Analysis on Negative Effects of Shaft Deflection on Angular Misalignment of Rollers Inside Tapered Roller Bearing Open
Shaft deflection degrades roller alignment and intensifies stress concentration/edge effects at roller-ends and raceway edges, ultimately compromising service performance of tapered roller bearings (TRBs). Therefore, a dynamic model was de…
View article: Dynamic Characteristic Analysis of Angular Contact Ball Bearings with Two-Piece Inner Rings in Aero-Engine Main Shafts Under Unsteady-State Conditions
Dynamic Characteristic Analysis of Angular Contact Ball Bearings with Two-Piece Inner Rings in Aero-Engine Main Shafts Under Unsteady-State Conditions Open
The dynamic interactions among the internal components of aero-engine main shaft bearings under unsteady-state conditions are intricate, involving clearance collisions, contact, friction, and lubrication. The dynamic characteristics of bea…
View article: Cross-Document Contextual Coreference Resolution in Knowledge Graphs
Cross-Document Contextual Coreference Resolution in Knowledge Graphs Open
Coreference resolution across multiple documents poses a significant challenge in natural language processing, particularly within the domain of knowledge graphs. This study introduces an innovative method aimed at identifying and resolvin…
View article: Analysis of bulletproof performance of structurally optimized ceramic composite armor through numerical simulation and live fire test
Analysis of bulletproof performance of structurally optimized ceramic composite armor through numerical simulation and live fire test Open
This work aims to address key issues in the ballistic performance of ceramic-based composite armor, particularly at the joints of spliced bulletproof panels. The edge structure of C/C-SiC ceramic plates and ultra-high molecular weight po…
View article: Research on Sudden Unbalance Response of Rigid-Elastic-Oil Coupled Ball Bearings
Research on Sudden Unbalance Response of Rigid-Elastic-Oil Coupled Ball Bearings Open
(1) Background: To better understand the dynamic characteristics of a ball bearing with an elastic ring squeeze film damper (ERSFD) under sudden unbalance, a novel dynamic model was established by fully considering the coupling between the…
View article: Development and Investigation of Non-Destructive Detection Drive Mechanism for Precision Type Cylindrical Roller Dynamic Unbalance
Development and Investigation of Non-Destructive Detection Drive Mechanism for Precision Type Cylindrical Roller Dynamic Unbalance Open
In the process of dynamic unbalance detection for precision cylindrical rollers, challenges such as difficulty in achieving effective driving and susceptibility to surface damage during driving significantly impact the accuracy of unbalanc…
View article: Dynamic Characteristics Study of Elastic Ring Squeeze Film Damper with Rigid–Elastic–Oil Coupled Model
Dynamic Characteristics Study of Elastic Ring Squeeze Film Damper with Rigid–Elastic–Oil Coupled Model Open
Due to the coupling of the damper journal with the elastic ring and oil film, the elastic ring squeeze film damper (ERSFD) shows better dynamic performance in comparison with the traditional squeeze film damper (SFD). Therefore, a novel ri…
View article: Intelligent Early Fault Diagnosis of Space Flywheel Rotor System
Intelligent Early Fault Diagnosis of Space Flywheel Rotor System Open
Three frequently encountered problems—a variety of fault types, data with insufficient labels, and missing fault types—are the common challenges in the early fault diagnosis of space flywheel rotor systems. Focusing on the above issues, th…
View article: Study on Fatigue Characteristics of Rivets in Bearing Cage for an Aeroengine Transmission System
Study on Fatigue Characteristics of Rivets in Bearing Cage for an Aeroengine Transmission System Open
This study focuses on the rivet early fatigue characteristics in a deep-groove ball bearing cage for a transmission system in a turboprop engine. Nonlinear dynamic differential equations for the deep-groove ball bearing with a two-piece ca…
View article: Dynamic Evaluation of the Degradation Process of Vibration Performance for Machine Tool Spindle Bearings
Dynamic Evaluation of the Degradation Process of Vibration Performance for Machine Tool Spindle Bearings Open
Real-time condition monitoring and fault diagnosis of spindle bearings are critical to the normal operation of the matching machine tool. In this work, considering the interference of random factors, the uncertainty of the vibration perfor…
View article: Design and Research of Non-destructive Detection Drive Device for Precision Type Cylindrical Roller Dynamic Unbalance
Design and Research of Non-destructive Detection Drive Device for Precision Type Cylindrical Roller Dynamic Unbalance Open
In order to solve the problem of small high-speed precision cylindrical roller, which is difficult to drive and the surface is easily damaged when doing dynamic unbalance detection due to the small size and light mass of the roller, this p…
View article: Research on the Power Loss of High-Speed and High-Load Ball Bearing for Cryogenic Turbopump
Research on the Power Loss of High-Speed and High-Load Ball Bearing for Cryogenic Turbopump Open
This paper studies the lubrication characteristics of ball bearings for cryogenic turbopumps. First, the frictional coefficients between 440C and a Ag coating, 440C and solid PTFE (polytetrafluoroethylene), and 440C and a PTFE coating in L…
View article: A Novel Model for Evaluating the Operation Performance Status of Rolling Bearings Based on Hierarchical Maximum Entropy Bayesian Method
A Novel Model for Evaluating the Operation Performance Status of Rolling Bearings Based on Hierarchical Maximum Entropy Bayesian Method Open
Information such as probability distribution, performance degradation trajectory, and performance reliability function varies with the service status of rolling bearings, which is difficult to analyze and evaluate using traditional reliabi…
View article: Pressure performance for a thin-walled ring and turbulent-jet orifice modeled elastic squeeze film damper
Pressure performance for a thin-walled ring and turbulent-jet orifice modeled elastic squeeze film damper Open
This paper explores an analytical model for Elastic Ring Squeeze Film Damper (ERSFD) with thin-walled ring and turbulent-jet orifices, and uncovers its Oil Film Pressure Performance (OFPP). Firstly, the ring deformation is addressed by usi…
View article: [Retracted] Data‐Driven Fatigue Damage Monitoring and Early Warning Model for Bearings
[Retracted] Data‐Driven Fatigue Damage Monitoring and Early Warning Model for Bearings Open
Since the manual extraction of features is not sufficient to accurately characterize the health status of rolling bearings, machine learning algorithms are gradually being used for fault diagnosis of bearings, which can adaptively learn th…
View article: Abnormal Wear Mechanism and Improvement of High‐Speed Cylindrical Roller Bearing
Abnormal Wear Mechanism and Improvement of High‐Speed Cylindrical Roller Bearing Open
This paper presents the dynamic differential equations of cylindrical roller bearing, considering the dynamic unbalance mass of roller and the contact between the roller end face and the inner ring rib. The influence of bearing working con…
View article: Safety Characteristic Evaluation of Cage in Cylindrical Roller Bearing at the Stage of Start-Up and Stop
Safety Characteristic Evaluation of Cage in Cylindrical Roller Bearing at the Stage of Start-Up and Stop Open
The dynamics model of cylindrical roller bearing (CRB) in aeroengine main shaft was promoted and solved by Hilber–Hughes–Taylor (HHT) integer algorithm with variable step in combination with symmetric multiprocessing (SMP) parallel solving…
View article: Experimental study on impact of roller imbalance on cage stability
Experimental study on impact of roller imbalance on cage stability Open
This study presents a method for measuring the imbalance in a small-sized cylindrical roller. The roller imbalance was calibrated on the built static-pressure-air flotation measurement machine. The impact of the roller imbalance on the dyn…
View article: Parameter-Adaptive VMD Method Based on BAS Optimization Algorithm for Incipient Bearing Fault Diagnosis
Parameter-Adaptive VMD Method Based on BAS Optimization Algorithm for Incipient Bearing Fault Diagnosis Open
In view of the incipient fault characteristics are difficult to be extracted from the raw bearing fault signals, an incipient bearing fault diagnosis method based on parameter-adaptive variational mode decomposition (VMD) is proposed. The …
View article: Analysis of Dynamic Characteristics of Grease‐Lubricated Tapered Roller Bearings
Analysis of Dynamic Characteristics of Grease‐Lubricated Tapered Roller Bearings Open
Tapered roller bearings (TRBs) are applied extensively in the field of high‐speed trains, machine tools, automobiles, etc. The motion prediction of main components of TRBs under grease lubrication will be beneficial to the design of bearin…
View article: Vibration Analysis and Optimization of a Rectangular Plate with Flanging Hyperellipse Cutout
Vibration Analysis and Optimization of a Rectangular Plate with Flanging Hyperellipse Cutout Open
Vibration analysis and optimization of a rectangular plate with a flanging hyperellipse cutout is investigated in this paper, numerically. In the analysis, finite element method (FEM) is applied to perform parametric studies on various pla…
View article: Cage slip characteristics of a cylindrical roller bearing with a trilobe-raceway
Cage slip characteristics of a cylindrical roller bearing with a trilobe-raceway Open
Based on dynamic analysis of rolling bearings, the nonlinear dynamic differential equations of a cylindrical roller bearing with a trilobe-raceway were established and solved by the GSTIFF (gear stiff) integer algorithm with a variable ste…
View article: The numerical simulation of GCr15 YRT ring during quenching and deep cryogenic treatment
The numerical simulation of GCr15 YRT ring during quenching and deep cryogenic treatment Open
The temperature-microstructure-stress/strain coupling model of YRT inner ring in the process of oil quenching and deep cryogenic treatment (DCT) were established to study the change rule of cooling process, microstructure evolution and res…
View article: Study on cage slip characteristics of hybrid ceramic cylindrical roller bearing
Study on cage slip characteristics of hybrid ceramic cylindrical roller bearing Open
In order to investigate the cage slip ratio, the dynamic differential equations of high-speed cylindrical roller bearing were built and solved by GSTIFF (Gear Stiff) integer algorithm.Cage slip ratio in hybrid ceramic cylindrical roller be…
View article: Impact of lubricant traction coefficient on cage’s dynamic characteristics in high-speed angular contact ball bearing
Impact of lubricant traction coefficient on cage’s dynamic characteristics in high-speed angular contact ball bearing Open
In this paper, the formulas of elasto-hydrodynamic traction coefficients of three Chinese aviation lubricating oils, 4109, 4106 and 4050, were obtained by a great number of elasto-hydrodynamic traction tests. The nonlinear dynamics differe…