一种有效降低压力机喉口下过渡圆弧处应力集中的方法  

ONE OF THE EFFICIENT METHODS FOR REDUCING THE STRESS CONCENTRATION OF PRESS THROAT'S LOWER TRANSITION ARC

作　　者：徐亚洲[1] 吴志学[1] 田帅[1] 华亚俊 

机构地区：[1]扬州大学机械工程学院,扬州225009

出　　处：《机械强度》2014年第1期72-75,共4页Journal of Mechanical Strength

基　　金：国家自然科学基金(51075354)资助~~

摘　　要：针对以降低压力机喉口下过渡圆弧处应力集中为目标的形状优化问题,采用一种简单而高效的参数化方法来描述过渡圆弧形状,并取得了很好的优化效果。该方法采用超椭圆方程来描述过渡圆弧形状,这样,由于设计变量只有3个,可以方便地利用内嵌于一般通用有限元分析软件的优化设计模块来描述和求解最优过渡圆弧形状。结论表明,采用这种方法进行形状优化后,喉口下过渡圆弧处的最大von Mises应力减小了10.7%。同时,运用有限元分析软件Ansys中的子模型技术,较好的解决了大型复杂工程结构仿真中控制计算规模与保证求解精度之间的矛盾。an efficient and simple parameterization method is proposed to obtain optimal press throat＇s lower transition arc shape. This method can easily reduce the stress concentration in the throatg lower transition arc region. The press throatg lower transition arc is described by super elliptic parameterized equations. Due to merely three of the design variables, thus it beconms to be easily described and obtains optimal transition arc shape, making use of the optimization module provided by a commercial finite element package. The results show that throat＇ s lower transition arc＇ s maximum yon Mises stress is reduced by 10.7%. In the meantime, the contradiction between the computation scale and the solving accuracy in the large and complicated engineering structures simulation have been resolved by using submodeling technology of commercial finite element analysis software ANSYS.

关 键 词：压力机 喉口 形状优化 应力集中 超椭圆 子模型 有限元方法 

分 类 号：O302[理学—力学] TH123[机械工程—机械设计及理论]