Analysis and Optimization of Dynamic and Static Characteristics of Horizontal Machining Center Machine Bed based on BP-GA Algorithm

Yahui Wang ； Chong Wang ； Chaojie Ma ； Xuebing Wang ； Huchen Zhang

《International Core Journal of Engineering》 8卷7期 (2022/07) Pp. 701-716

https://doi.org/10.6919/ICJE.202207_8(7).0094

摘要

In order to improve the dynamic and static performance of the horizontal machining center bed and reduce the bed mass, a comprehensive optimization of the ribbed structure of the bed is carried out. Firstly, the dynamic and static characteristics of the machine bed are analyzed to find out the weak points of the bed, secondly, the topology of the machining center bed is optimized based on the variable density method using Topology Optimization function, and the new bed shape is obtained by re-modeling the bed based on the topology results. A leaf vein-like structure and an arched structure are redesigned for the bottom and the inner plate rib of the bed, respectively. Finally, the main dimensions of the plate reinforcement structure are selected, and the dimensional optimization is performed by combining BP neural network and NSGA-II. The optimization results are compared with the orthogonal test optimization method to verify the superiority of BP-GA algorithm. After the simulation analysis, the bed was optimized to reduce the mass by 10.4% while the total deformation was reduced by 74.9% and the first-order natural frequency was increased by 24.9%.

關鍵字

Horizontal Machining Center ； Machine Bed ； Topology Optimization ； Orthogonal Test ； Neural Network

參考文獻

Kaya, N, & Genç, MO. "Design Optimization of a Beam Structure of Machine Tools." Proceedings of the ASME 2019 International Mechanical Engineering Congress and Exposition. Volume 14: Design, Systems, and Complexity. Salt Lake City, Utah, USA. November 11–14, 2019. V014T14A026. ASME.

Yuksel E, Erturk A S, Budak E. A hybrid contact implementation framework for finite element analysis and topology optimization of machine tools[J]. Journal of Manufacturing Science and Engineering, 2020, 142(8): 081001.

Triebe M J, Zhao F, Sutherland J W. Genetic Optimization for the Design of a Machine Tool Slide Table for Reduced Energy Consumption[J]. Journal of Manufacturing Science and Engineering, 2021, 143(10).

Dimitrov D M, Slavov S D, Yordanov K K. Stiffness design of machine tools structures by topology management optimization approach[C]//IOP Conference Series: Materials Science and Engineering. IOP Publishing, 2019, 564(1): 012071.

Zhang H, Ding X H, Dong X H, et al. Optimal topology design of internal stiffeners for machine pedestal structures using biological branching phenomena[J]. Structural and Multidisciplinary Optimization, 2018, 57(6): 2323-2338.