振动声学法在瓷支柱绝缘子检测中的应用

介绍振动声学法的检测原理及瓷支柱绝缘子振动声学法检测过程,分析检测结果及应用效果,并给出机械状态良好、底部法兰区域有缺陷、顶部法兰区域有缺陷时峰值出现的频率范围,提出检测注意事项,重点分析周围物体连接状况、温度对检测结果的影响。

支柱瓷绝缘子表面缺陷振动声学法检测的研究

阐述了支柱瓷绝缘子带电和非带电检测方法及其原理,并就其对表面缺陷的检测效果进行了对比分析,指出采用超声相控阵检测表面缺陷为目前非带电检测时的最佳选择。分析了表面缺陷对支柱瓷绝缘子纵向振动模式下固有频率的影响程度,探讨了该检测方法对支柱瓷绝缘子特定缺陷进行检测的可行性。

振动声学法在瓷支柱绝缘子检测中的实践

目的:探究振动声学法在瓷支柱绝缘子检测中的操作性.方法:先构建数据模型,展开仿真实验检测,明确理论分析中的检测应用效果,随后再通过实际试验操作,对阶跃信号及白噪声信号应用加以检测,通过理论实验与实践试验结论对比,得出该方法检测应用的可行性.结果:经综合分析后发现,阶跃信号在绝缘子缺陷检测中不具实效性,而连续白噪声信号在检测中具有良好的检测效果.结论:振动声学法使用连续白噪声可以实现对瓷支柱绝缘子中缺陷问题的有效检测,并具有良好的检测效果,科学配合其他检测技术具有良好的应用价值.

振动声学法在瓷支柱绝缘子检测中的运用

振动声学理论在设备仪器探伤检测中的应用非常广泛,主要通过振动声波在检测材料中传播的波形图变化来探明材料内部的特性和结构。本文主要介绍了基于振动声学理论的探伤方法在瓷支柱绝缘子检测中的应用,详细介绍了该方法的原理、检查过程和效果,并对其后续研究方向进行简要阐述。

大型发电机定子铁心边段故障的在线声学振动诊断

利用定子铁心声学振动加速度幅频曲线的形状以及频谱功率参数随无功功率变化而变化的情况,可以准确地在线诊断出大型发电机定子铁心边段的故障情况,用以确定电机的最佳运行状态以及大修计划。

Experimental and Numerical Procedures of a Sonar Platform with a Sound Absorption Wedge

Experiments involving a sonar platform with a sound absorption wedge were carried out for the purpose of obtaining the low frequency acoustic characteristics. Acoustic characteristics of a sonar platform model with a sound absorption wedge were measured, and the effects of different wedge laid areas on platform acoustic characteristic were tested. Vibration acceleration and self-noise caused by model vibration were measured in four conditions: 0%, 36%, 60%, and 100% of wedge laid area when the sonar platform was under a single frequency excitation force. An experiment was performed to validate a corresponding numerical calculation. The numerical vibration characteristics of platform area were calculated by the finite element method, and self-noise caused by the vibration in it was predicted by an experiential formula. The conclusions prove that the numerical calculation method can partially replace the experimental process for obtaining vibration and sound characteristics.