南京航空航天大学 机电学院,南京 210000
何淑婷,女,2000年生,江苏靖江人,硕士研究生;主要研究方向为机械传动与振动分析;E-mail:hest830@163.com。
朱如鹏(通信作者),男,1959年生,江苏建湖人,教授,博士研究生导师;主要研究方向为机械传动设计理论与技术;E-mail:rpzhu_nuaa@163.com。
收稿:2024-07-31,
修回:2024-08-13,
纸质出版:2026-03-15
移动端阅览
何淑婷,朱如鹏,王端滉,等. 带裂纹双膜盘联轴器转子系统的动力学建模与分析[J]. 机械强度,2026,48(3):122-132.
HE Shuting,ZHU Rupeng,WANG Duanhuang,et al. Dynamic modeling and analysis of the rotor system with cracked double diaphragm coupling[J]. Journal of Mechanical Strength,2026,48(3):122-132.
何淑婷,朱如鹏,王端滉,等. 带裂纹双膜盘联轴器转子系统的动力学建模与分析[J]. 机械强度,2026,48(3):122-132. DOI: 10.16579/j.issn.1001.9669.2026.03.014.
HE Shuting,ZHU Rupeng,WANG Duanhuang,et al. Dynamic modeling and analysis of the rotor system with cracked double diaphragm coupling[J]. Journal of Mechanical Strength,2026,48(3):122-132. DOI: 10.16579/j.issn.1001.9669.2026.03.014.
目的
2
针对带裂纹双膜盘联轴器转子系统动力学特性研究不足的问题,考虑联轴器刚度交叉耦合项,推导带裂纹膜盘的时变刚度矩阵,为该类系统裂纹故障诊断与安全运行提供参考。
方法
2
首先,建立含刚度交叉耦合项的转子系统动力学方程,为裂纹影响分析提供模型支撑;其次,基于有限元法求解系统临界转速,与Ansys软件仿真结果对比,验证模型的正确性;然后,通过Newmark-β法求解有、无裂纹时的动力学响应,获取转速-幅值图、频响-转速瀑布图及轴心轨迹;最后,系统分析裂纹长度(5~30 mm)和位置(内、外径)对系统响应的影响规律。
结果
2
结果表明,裂纹会引入2倍频成分,转速跨过
ω
1
/2(630 r/min)时轴心轨迹内环旋转约180°;输出端裂纹长度增至20 mm时,1阶临界转速从1 270 r/min降至1 260 r/min,2倍频成分显著增强;裂纹初期,外径处影响更明显,随着裂纹长度增加,内径处影响占优,验证了模型与分析方法的有效性。
Objective
2
Aiming at the insufficient research on the dynamic characteristics of the rotor system with cracked double diaphragm coupling
the cross-coupling term of coupling stiffness was considered
and the time-varying stiffness matrix of the cracked diaphragm was derived to provide a reference for the crack fault diagnosis and safe operation of such systems.
Methods
2
Firstly
a dynamic equation of the rotor system including the cross-coupling stiffness term was established to provide model support for the analysis of crack effects. Secondly
the critical speed of the system was solved based on the finite element method
and compared with the simulation results of Ansys software to verify the correctness of the model. Then
the dynamic responses with and without cracks were solved by the Newmark-β method to obtain speed-amplitude diagrams
frequency response-speed waterfall diagrams and axis trajectories. Finally
the influence laws of crack length (5-30 mm) and position (inner and outer diameters) on the system response were systematically analyzed.
Results
2
The results show that cracks introduce 2 harmonic rotational frequency components
and the inner ring of the axis trajectory rotates about 180° when the speed crosses
ω
1
/2 (630 r/min). When the crack length at the output end increases to 20 mm
the first-order critical speed decreases from 1 270 r/min to 1 260 r/min
and the 2 harmonic component is significantly enhanced. The influence of cracks at the outer diameter is more obvious in the initial stage
and the influence at the inner diameter dominated with the increase of crack length
verifying the effectiveness of the model and analysis method.
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