radiation impedance meaning in English

辐射性阻抗
辐射阻抗振动物体是一队阻抗，其阻分量相等，抗分量等值而符号相反

Numerical calculation of radiation impedance of the square piston
方形活塞声源辐射阻抗的数值计算
The radiation impedance at the resonant frequency , in analytical form , is consequently , the equivalent circuit of the plate is obtained
采用解析法求得它在谐振频率下工作时的辐射阻抗为，在此基础上可以得到阶梯圆板的等效电路。
In this article based on vibration theory of the flexural plate , the frequency equation , the equivalent mass and radiation impedance are derived and further , design theory is introduced
本文从薄圆板弯曲振动理论出发，推导了这种阶梯圆盘的频率方程、等效质量、等效弹性和辐射阻抗，并进而提出了这种阶梯圆盘的一般设计方法。
But to circular plate with large surface area , the vibrate modes generated is often so high that there is reverse phases existing , which result in a decrease in radiation impedance , electric - acoustic efficiency and the electric power , as well as poor directivity
然而对于辐射面积较大的弯曲振动圆盘，一般激励的振动阶数比较高，因此存在弯曲振动的反相区，导致换能器的辐射阻抗下降，电声效率和声功率降低以及指向性变差等问题。