TY - GEN
T1 - Structural Dynamics Modeling with Modal Parameters and Excitation Decoupling Method Based on Energy Distribution
AU - Chen, Kun
AU - Gan, Jianfeng
AU - Kang, Xi
AU - Xu, Peng
N1 - Publisher Copyright:
© The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd 2023.
PY - 2023
Y1 - 2023
N2 - Modal parameter is powerful for studying the dynamical characteristics of mechanical systems. For dynamics characteristics observation of chatter suppression of machine tool, dynamics model establishment using modal parameters is essential. To increase the accuracy of the model, its dimension should be increased so that is greater than the number of excitations that can be actually measured. This drawback restricts the development of the structural dynamics model. This paper establishes a modal parameters structural dynamics model of a 3-axis high-precision machine tool and proposes an excitation decoupling method to address this issue. Firstly, a 3-direction 3-order modal structural dynamics model is designed. Based on the proportion of vibration energy, a decoupling method is invented to expand the dimension of external excitation. Secondly, experimental modal analysis is performed on the tool center point of the machine tool, its first 3-order natural frequencies, damping ratios, and dynamic stiffness in spatial orthogonal directions are measured and extracted. Finally, the dynamic responses of the machine tool under free vibration, forced vibration, and mixed vibration are simulated. Their conclusions are verified by vibration theory to ensure the quality of the raised algorithm. This model can balance the modeling quality and solvability of the dynamic equations, leading to brilliant simulation conclusion.
AB - Modal parameter is powerful for studying the dynamical characteristics of mechanical systems. For dynamics characteristics observation of chatter suppression of machine tool, dynamics model establishment using modal parameters is essential. To increase the accuracy of the model, its dimension should be increased so that is greater than the number of excitations that can be actually measured. This drawback restricts the development of the structural dynamics model. This paper establishes a modal parameters structural dynamics model of a 3-axis high-precision machine tool and proposes an excitation decoupling method to address this issue. Firstly, a 3-direction 3-order modal structural dynamics model is designed. Based on the proportion of vibration energy, a decoupling method is invented to expand the dimension of external excitation. Secondly, experimental modal analysis is performed on the tool center point of the machine tool, its first 3-order natural frequencies, damping ratios, and dynamic stiffness in spatial orthogonal directions are measured and extracted. Finally, the dynamic responses of the machine tool under free vibration, forced vibration, and mixed vibration are simulated. Their conclusions are verified by vibration theory to ensure the quality of the raised algorithm. This model can balance the modeling quality and solvability of the dynamic equations, leading to brilliant simulation conclusion.
KW - Excitation decoupling
KW - Experimental modal analysis
KW - Structural dynamics
KW - Vibration simulation
UR - https://www.scopus.com/pages/publications/85175862850
U2 - 10.1007/978-981-99-6492-5_14
DO - 10.1007/978-981-99-6492-5_14
M3 - 会议稿件
AN - SCOPUS:85175862850
SN - 9789819964918
T3 - Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)
SP - 150
EP - 161
BT - Intelligent Robotics and Applications - 16th International Conference, ICIRA 2023, Proceedings
A2 - Yang, Huayong
A2 - Liu, Honghai
A2 - Zou, Jun
A2 - Yin, Zhouping
A2 - Liu, Lianqing
A2 - Yang, Geng
A2 - Ouyang, Xiaoping
A2 - Wang, Zhiyong
PB - Springer Science and Business Media Deutschland GmbH
T2 - 16th International Conference on Intelligent Robotics and Applications, ICIRA 2023
Y2 - 5 July 2023 through 7 July 2023
ER -