期刊文献+
共找到2篇文章
< 1 >
每页显示 20 50 100
Cymbal换能器的有限元动力学分析 被引量:6
1
作者 王光灿 林宇 +3 位作者 王丽坤 李光 栾桂冬 张福学 《压电与声光》 CSCD 北大核心 2003年第5期418-421,共4页
用有限元法和ANSYS 5.7软件模拟、分析了Cymbal换能器的动力学特性。在模态分析的基础上进行了动力学分析,计算了Cymbal换能器前3阶振动模态的位移分布曲线,速度分布曲线和加速度分布曲线。研究了Cymbal换能器的不同空腔高度与它的谐振... 用有限元法和ANSYS 5.7软件模拟、分析了Cymbal换能器的动力学特性。在模态分析的基础上进行了动力学分析,计算了Cymbal换能器前3阶振动模态的位移分布曲线,速度分布曲线和加速度分布曲线。研究了Cymbal换能器的不同空腔高度与它的谐振频率、位移、加速度和速度分布曲线之间的关系。研制了Cymbal换能器样品。ANSYS5.7软件的Cymbal换能器动力学分析结果与用POLYTEC PSV300-F Scanning Laser Vibro-meter型激光扫描仪对Cymbal换能器样品的实测值相近。 展开更多
关键词 有限元法 CYMBAL换能器 空腔高度 动力学分析
下载PDF
On High Brightness Temperature of Pulsar Giant Pulses
2
作者 Victor M. Kontorovich 《Journal of Physical Science and Application》 2015年第1期48-60,共13页
A wide range of events observed at the giant pulses (high energy density, observed localization of giant pulses GPs relative to the average pulse, fine structure of GPs with duration up to some nanoseconds, observed ... A wide range of events observed at the giant pulses (high energy density, observed localization of giant pulses GPs relative to the average pulse, fine structure of GPs with duration up to some nanoseconds, observed circular polarization of GPs, correlation between the GP phase and the phase of the hard pulsar emission X-ray and gamma) can be explained from the viewpoint that the internal polar gap is a cavity-resonator stimulated by discharges and radiating through the breaks in the magnetosphere. The new results in this field [the electromagnetic (era) waves generation in the gap in the process of longitudinal acceleration in the electric field vanishing on the star surface, high frequency break in the spectrum as a result of switching off this generation, formation in this process a power-low spectrum with a high frequency (hf) break, the possibility determination of pulsar magnetic field by the hf break position, the difference between main pulse and inter pulse mechanism generation, quantization of em tornado rotation in the gap and appearance of the bands in the inter pulse spectrum, influence the high energy density in the gap on pair generation and position of the dead line in pulsars] are added in the intermediate epilogue. 展开更多
关键词 PULSARS giant pulses inner gap cavity-resonator spark rotation electromagnetic tornado.
下载PDF
上一页 1 下一页 到第
使用帮助 返回顶部