scholarly journals Nonlinear Vibration Characteristics of the Involute Spline Coupling in Aeroengine with the Parallel Misalignment

2021 ◽  
Vol 2021 ◽  
pp. 1-19
Author(s):  
Xiangzhen Xue ◽  
Qixin Huo ◽  
Jian Liu
Keyword(s):  
Nonlinear Vibration ◽  
Vibration Characteristics ◽  
Fretting Wear ◽  
Meshing Stiffness ◽  
Vibration Model ◽  
Parallel Misalignment ◽  
Spline Coupling ◽  
Dynamic Meshing ◽  
Fretting Damage ◽  
Involute Spline

In order to control the vibration of the involute spline coupling in aeroengine well and reduce the fretting wear, a bending–torsion coupling nonlinear vibration model of the involute spline coupling with the misalignment was proposed, and a dynamic meshing stiffness function with multiteeth engagement was established. Then, the influence of different misalignment, wear, and rotation speeds with different misalignment on the nonlinear vibration characteristics of the involute aviation spline coupling was explored. The result shows that with an increase of the parallel misalignment, the system experienced the state of a single period, a quasiperiod, multiperiod, and chaos but finally only alternated between the quasiperiod and the chaos state. The uneven wear of each tooth of the spline displayed a significant influence on the vibration of the spline coupling, and the influence of the uniform wear was smaller under given conditions here. Furthermore, with an increase of the speed, the larger the misalignment was, the more times the system entered or left the chaos state were. The model proposed here is found to be closer to the actual working conditions, and the analysis results can provide more accurate external load conditions for the prediction of the fretting damage of the spline coupling in aeroengine.

Dynamic Characteristics and Load Coefficient Analysis of Involute Spline Couplings

2014 ◽  
Vol 889-890 ◽  
pp. 450-454
Author(s):  
Xiang Zhen Xue ◽  
San Min Wang
Keyword(s):  
Dynamic Model ◽  
Fourth Order ◽  
Dynamic Characteristics ◽  
Dynamic Load ◽  
Dynamic Equations ◽  
Kutta Method ◽  
Meshing Stiffness ◽  
Runge Kutta Method ◽  
Spline Coupling ◽  
Involute Spline

As one of the important components of aviation and space transmission systems, dynamic characteristics of involute spline couplings influence its lifetime and reliability seriously. Here, taking the backlash of spline joint into account, considering the meshing stiffness varying with the teeth engaged, established the dynamic model with varying stiffness and dynamic equations, and calculated the number of actual meshing teeth and comprehensive meshing stiffness while bearing the varying torque, then, solved dynamic equations using the fourth order Runge - Kutta method, finally, get the teeth meshing number is 23,and the maximum dynamic load coefficient gets smaller from 1.19 to1.15 with the decrease of . This provides a numerical basis for wear`s studying and lifetime`s forecasting of involute spline coupling.

scholarly journals Nonlinear dynamic load analysis of aviation spline coupling with mass eccentricity and misalignment

2021 ◽  
Vol 13 (2) ◽  
pp. 168781402199651
Author(s):  
Xiangzhen Xue ◽  
Qixin Huo ◽  
Jian Liu ◽  
Jipeng Jia
Keyword(s):  
Dynamic Load ◽  
Linear Dynamic ◽  
Coupling System ◽  
Mass Eccentricity ◽  
Aero Engine ◽  
Non Linear ◽  
Spline Coupling ◽  
Load Analysis ◽  
Dynamic Meshing ◽  
Involute Spline

Most of the time, mass eccentricity, and misalignment exist at the same time with aviation spline coupling working. Therefore, in this paper, the function of dynamic meshing force between multi-teeth and a non-linear dynamic model of involute spline coupling system in aero-engine with mass eccentricity and misalignment were presented. And then, the non-linear dynamic meshing force of spline coupling in aero-engine on different misalignment and mass eccentricity was investigated. The result shows that when the mass eccentricity and the misalignment are both small, the aviation involute spline coupling can run steady. And with the increase of mass eccentricity or misalignment, the dynamic load coefficient of the aviation involute spline coupling gradually increase. At the same time, as the mass eccentricity or misalignment increases, some teeth suffer more load, some teeth suffer less load, and some teeth are out of engagement so that they do not suffer any load. The running state of spline coupling becomes more and more unstable.

Nonlinear Vibration Characteristics of Helical Spring

2010 ◽  
Vol 29-32 ◽  
pp. 1317-1322
Author(s):  
Nan Nan Wang ◽  
You Fu Hou ◽  
Zu Zhi Tian
Keyword(s):  
Nonlinear Vibration ◽  
Constitutive Relations ◽  
Low Frequency ◽  
Vibration Characteristics ◽  
Rigid Body Dynamics ◽  
Helical Spring ◽  
Low Frequency Vibration ◽  
Near Resonance ◽  
Finite Element Technology ◽  
Dynamics Response

A helical spring has large deformation under the condition of near resonance, in order to obtain the nonlinear vibration characteristics, the single-integral constitutive relations of helical spring based on nonlinear theory are discussed firstly, then nonlinear dynamic characteristics of helical spring are analyzed based on finite element technology. Finally, the dynamic simulation associated with flexible characteristics for helical spring is studied in ADAMS. The results show that the maximum stress of helical spring appears at transition region between different radius which is consistent with fracture position actually. Flexible dynamic response of helical spring mainly behaves low frequency vibration which is different from rigid body dynamics response.

The application of fretting wear modelling to a spline coupling

Wear ◽  
2007 ◽  
Vol 262 (9-10) ◽  
pp. 1205-1216 ◽  
Author(s):  
J. Ding ◽  
I.R. McColl ◽  
S.B. Leen
Keyword(s):  
Fretting Wear ◽  
Wear Modelling ◽  
Spline Coupling

Nonlinear vibration characteristics of the rotor bearing system with bolted flange joints

2019 ◽  
Vol 233 (4) ◽  
pp. 910-930
Author(s):  
Yifu Zhou ◽  
Zhong Luo ◽  
Zifang Bian ◽  
Fei Wang
Keyword(s):  
Nonlinear Vibration ◽  
Time Domain ◽  
Harmonic Balance ◽  
Harmonic Balance Method ◽  
Rolling Bearing ◽  
Vibration Characteristics ◽  
Rotor System ◽  
Rotor Bearing ◽  
Bolted Flange ◽  
Bearing System

As sophisticated mechanical equipment, the rotor system of aero-engine is assembled by various parts; bolted flange joints are one of the essential ways of joints. Aiming at the analysis of the nonlinear vibration characteristics of the rotor-bearing system with bolted flange joints, in this paper, a finite element modeling method for a rotor-bearing system with bolted flange joints is proposed, and an incremental harmonic balance method combined with arc length continuation is proposed to solve the dynamic solution of the rotor system. In order to solve the rotor system with rolling bearing nonlinearity, the alternating frequency/time-domain process of the rolling bearing element is deduced. Compared with the conventional harmonic balance method and the time-domain method, this method has the characteristics of fast convergence and high computational efficiency; solving the rotor system with nonlinear bearing force; overcome the shortcoming that the frequency–response curve of the system is too sharp to continue solving. By using this method, the influence of bearing clearance and stiffness on vibration characteristics of the rotor system with bolted flange joints is studied. The evolution law of the state of the rotor system with bolt flange is investigated through numerical simulation and experimental data. The results indicated that the modeling and solving method proposed in this paper could accurately solve the rotor-bearing system with bolted flange joints and analyze its vibration characteristics.

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