CAJ | 학술논문

针对模态分析、拓扑优化在龙门加工中心动横梁筋板形位尺寸优化中的局限性,提出了基于多目标优化的龙门加工中心动横梁筋板结构优化设计方法.该方法以模态分析和拓扑优化改进后的龙门加工中心动横梁为研究对象,把动横梁的质量、第1阶固有频率和自重状态下最大变形量为优化设计目标函数,动横梁筋板结构的位置尺寸和筋板的厚度尺寸作为优化变量,建立了龙门加工中心动横梁筋板结构的多目标优化模型,分析了优化变量对动横梁质量、第1阶固有频率和自重状态下最大变形量的影响,求出了动横梁部件筋板结构Pareto最优解.经过多目标优化改进后的动横梁部件1阶固有频率提高了7.36%、质量减轻了4.97%、自重状态下最大变形量略有减小,表明该优化设计方法合理可行.
침대모태분석、탁복우화재룡문가공중심동횡량근판형위척촌우화중적국한성,제출료기우다목표우화적룡문가공중심동횡량근판결구우화설계방법.해방법이모태분석화탁복우화개진후적룡문가공중심동횡량위연구대상,파동횡량적질량、제1계고유빈솔화자중상태하최대변형량위우화설계목표함수,동횡량근판결구적위치척촌화근판적후도척촌작위우화변량,건립료룡문가공중심동횡량근판결구적다목표우화모형,분석료우화변량대동횡량질량、제1계고유빈솔화자중상태하최대변형량적영향,구출료동횡량부건근판결구Pareto최우해.경과다목표우화개진후적동횡량부건1계고유빈솔제고료7.36%、질량감경료4.97%、자중상태하최대변형량략유감소,표명해우화설계방법합리가행.
In view of the limitations for the modal analysis and topology optimization in the shape and posi-tion size of the gantry machining center moving beam stiffened plates optimization design,the optimization design method for moving beam stiffened plates of gantry machining center based on multi-objective optimi-zation is presented.The method uses improved moving beam of gantry machining center by modal analysis and topology optimization as the research object,takes the weight,the first natural frequency and maximum deformation under gravity as the optimal objective function,takes the position and thickness dimensions of the moving beam stiffened plates as optimal variables,established the multi-objective optimization model of the moving beam stiffened plates,analyzed the influence of the optimization variables to the weight,the first natural frequency and maximum deformation under gravity,and got the optimal Pareto solutions of the mov-ing beam stiffened plates.The moving beam improved by multi-objective optimization that the first natural frequency was increased 7.36%,the weight was reduced 4.97%,and maximum deformation under gravity is slightly decreases,shows that the optimization design method is reasonable and feasible.