In this paper, the internal friction of foamed Al-Si alloy(ZL104) in different bending modes was investigated, for getting the characteristics of the internal friction of foamed metal in different boundary conditions.
为了获得不同边界条件下泡沫金属的内耗特征,通过采用动态机械分析仪在不同弯曲模式下对泡沫铝硅合金的内耗进行实验研究。
For the forming in testing, the defects in punching-cutting compound die are analyzed and improved, whilst, in order to satisfy producing in large volume, a bending die with swing which can be once bent into closed cylinder is designed.
针对消音筒生产试制及大批量生产的工况分别制订了工艺方案,对试制中成形——冲切复合模出现的缺陷进行了分析及改进,同时,设计了1副能一次性弯成封闭圆筒的摆块式弯曲模,满足了大批量生产的要求。
This paper analyzes the design theory of low - frequency piezoelectricity energy converter in the application of sonic logging, and clarifies that bending vibration mode is an effective method to reduce the energy converter frequency of conventional sonic logging.
对声波测井中应用的低频压电式换能器的设计理论加以分析,阐明采用弯曲振动模式是降低常规声波测井换能器频率的有效方法,通过对圆面弯曲振动换能器振动方程的求解,给出振动位移和固有频率的计算表达式,按这种理论设计的换能器,能够满足低频和井眼尺寸要求。
