Dynamic analysis of grinding electric spindle bearing-rotor system under eccentric action

Sheng, Lianchao; Sun, Qi; YE, Guo; Li, Wei

doi:10.1299/jamdsm.2023jamdsm0028

Cited by 2 publications

(1 citation statement)

References 28 publications

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“…The damper can simulate the damping effect of the system, thus reducing unwanted vibrations and improving the stability and response characteristics of the system. Applying multibody dynamics theory [18][19], the continuous mass and infinite degrees of freedom in the shaft are discretized into a finite element model with n-order degrees of freedom. The overall BLMS system dynamics model of the system was established as in Eq.…”

Section: Ddiscrete Multibody Dynamics Modeling Of a Blmsmentioning

confidence: 99%

Research on Vibration Characteristics of Bearingless Motorized Spindle Based on Multibody Dynamics

Meng,

He,

Yang

et al. 2024

Preprint

View full text Add to dashboard Cite

During the service process of bearingless motorized spindle (BLMS), its parameters change with time and external conditions, leading to the decrease in the accuracy of the motorized spindle. Therefore, it is difficult to accurately describe the dynamic performance of the motorized spindle during actual operation using deterministic parameters. In this paper, the interactions between thermal deformation and vibration of the motorized spindle are explored. The dynamic model of the motorized spindle based on multibody dynamics and time-varying parameters is established, and the solution method of dynamic model with uncertain parameters is investigated. Firstly, the reasons of vibration in the BLMS are analyzed, and the influences of thermal deformation on the thermal eccentricity and inhomogeneous air gap of BLMS are studied. The vibration model of the BLMS is established and solved to acquire the radial vibration displacement. Secondly, the discrete multibody dynamics model of the BLMS is built, and the center trajectory of the motorized spindle is attained by solving the multibody dynamics model. The prototype experimental platform of BLMS is designed and the vibration tests are carried out. The experimental results show that the vibration amplitude of the BLMS increases with the running time, and the maximum displacement has a large deviation from the simulation results using the determined parameters, while a small deviation from the simulation results using the uncertain parameters. It indicates that the solution of the multibody dynamics model of the BLMS described by uncertain parameters is closer to the experimental data. The research findings can provide reference for the optimized design of BLMS.

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Section: Ddiscrete Multibody Dynamics Modeling Of a Blmsmentioning

confidence: 99%

Research on Vibration Characteristics of Bearingless Motorized Spindle Based on Multibody Dynamics

Meng,

He,

Yang

et al. 2024

Preprint

View full text Add to dashboard Cite

show abstract

Research on Vibration Characteristics of Bearingless Motorized Spindles Based on Multibody Dynamics

Meng,

He,

Yang

et al. 2024

Machines

View full text Add to dashboard Cite

During the service process of a bearingless motorized spindle (BLMS), its parameters change with both time and external conditions, leading to a decrease in the accuracy of the motorized spindle. Therefore, it is difficult to accurately describe the dynamic performance of a motorized spindle during its actual operation using deterministic parameters. In this paper, the interactions between the thermal deformation and vibration of a motorized spindle are explored. A dynamic model of the motorized spindle based on multibody dynamics and time-varying parameters is established, and a solution method for the dynamic model with uncertain parameters is investigated. Firstly, the reasons for the vibration in the BLMS are analyzed, and the influences of thermal deformation on the thermal eccentricity and inhomogeneous air gap of the BLMS are studied. A vibration model of the BLMS is established and solved to acquire the radial vibration displacement. Secondly, a discrete multibody dynamics model of the BLMS is built, and the center trajectory of the motorized spindle is attained by solving the multibody dynamics model. A prototype experimental platform of the BLMS is designed, and vibration tests are carried out. The experimental results show that the vibration amplitude of the BLMS increases with the running time and the maximum displacement exhibits a large deviation from the simulation results using the determined parameters, while there is a small deviation from the simulation results using uncertain parameters; this indicates that the solution of the multibody dynamics model of the BLMS described by uncertain parameters is closer to the experimental data. These research findings can provide a reference for the optimized design of BLMSs.

show abstract

Dynamic analysis of grinding electric spindle bearing-rotor system under eccentric action

Cited by 2 publications

References 28 publications

Research on Vibration Characteristics of Bearingless Motorized Spindle Based on Multibody Dynamics

Research on Vibration Characteristics of Bearingless Motorized Spindle Based on Multibody Dynamics

Research on Vibration Characteristics of Bearingless Motorized Spindles Based on Multibody Dynamics

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