摘要
以三轴直驱立式铣床的立柱为研究对象,以最大化静刚度与固有频率为目标,采用自适应成长法,对机床立柱的加强筋布局进行优化。为同步提升机床的抗振能力,选取对加工精度最敏感的若干个模态作为目标模态,在立柱上布置多级谐质量阻尼器(TMD)系统并确定了其最优安装位置及调谐参数。机床的动静态仿真结果表明,通过该设计方法,在立柱减重8.7%的同时维持了机床原有的动静态刚度性能,并在目标模态处对结构的振动响应进行了有效的抑制,验证了加强筋-TMD组合结构的设计可行性。
The column of a three-axis direct drive vertical milling machine was as research object. Adaptive growth method was adopted to optimize the layout of stiffeners of machine tool column, aiming at maximizing the static stiffness and natural frequency. In order to improve the anti-vibration ability of the machine tool synchronously, several modes which were most sensitive to the machining ac-curacy were selected as the target modes, a multiple TMD system was arranged on the column and its optimal installation position and tuning parameters were determined. The dynamic and static simulation results of the machine tool show that the column structure maintains the original dy-namic and static stiffness performance while the weight is reduced by 8.7%. Moreover, the vibra-tion response of the structure is effectively suppressed at the target mode, which verifies the design feasibility of the stiffener-TMD composite structure.
出处
《建模与仿真》
2023年第3期2359-2375,共17页
Modeling and Simulation
