The method of generating oblique and multi directional waves with side wall reflections is described in the paper and verified by physical simulations of multi directional waves. The test results show that this method can indeed extend the effective test area. 本文首先叙述了应用边墙反射产生斜向波和多向波的方法,通过物理模型试验对该方法进行了验证,试验结果表明采用边墙反射的确可以扩大有效试验区的范围。
Ultrasonic phased array actuator for acoustic-to-electronic transformation is the key part of ultrasonic phased array system. Ultrasonic phased array actuator has the capacity of auto-focus and deflection by time delay controlling and can be used for multi directional scanning of objects. 用于声/电转换的超声相控阵驱动器是超声相控阵检测系统的关键组成部分之一,通过延时控制,超声相控阵驱动器具有自动聚焦和偏转的能力,可以对被测结构进行多方位快速扫描。
A mathematical cognition model on anisotropic void damage by multi directional tomography is established in the present paper. 建立各向异性孔洞损伤的多方位层析识别数学模型。
The change of extrusion stress leads to the opening of the old faults of different trends in middle and shallow formation and provides multi directional channels for hydrocarbon migration. 挤压力方向的改变导致了中浅层不同方向的老断层开启,开辟了多方位的油气运移的通道;
The multi directional and heavy plastic deformation during forging produces fully recrystallized microstructures with average grain size of 1 8 μ m. 多向和大变形锻造产生平均晶粒尺寸1.8μm的完全再结晶组织。