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以直弧形四连杆型结晶器振动装置中的长臂为研究对象,利用模型切分方法,完成长臂复杂模型的全六面体网格划分,根据结晶器振动周期内前后两个半周期内不同作用力,运用有限元中分步加载的方法完成了一个周期内的长臂瞬态动力学分析。计算结果表明:在周期性交变载荷作用下,长臂的最小和最大综合应力的变化趋势几乎相同。二者后半周期的变化没有前半周期明显,且都存在极值波峰情况。在临界变化点时,波动差最大,极易使长臂产生破坏,因而在设计时应采用对长臂弯折处进行导角设计和局部增加筋板等方法以提高长臂的抗疲劳能力。
In this paper, the long arm in a vibrating device with straight arched four-link mold is taken as the research object. The full-faceted mesh of the long-arm complex model is completed by the model segmentation method. According to the two half cycles Different forces, the use of finite element method to complete the step loading of the long arm transient dynamics analysis. The calculation results show that under the cyclic alternating load, the trend of the minimum and maximum integrated stress of the long arm is almost the same. The change of the latter half of the period is not obvious in the first half of the period, and there are extreme peaks. In the critical point of change, the maximum fluctuation, easy to make the long arm damage, so in the design should be used on the long arm bending angle design and local increase ribs and other methods to improve long-arm fatigue resistance.