摘要
采用实验和理论模拟相结合的方式，研究了5～30kHz频率范围内弯曲振子的振动模态和频率响应特征。理论模拟和实验测量均显示在一定频段内弯曲振子存在多个振动模态．各个模态的振动频率不同；根据模态分析的振动变形图．可帮助识别弯曲振子在不同频率工作时的主要振动模式。谐振频率随着弯曲振子基片长度的减小、厚度的增加、弹性系数的增大以及所在介质声阻抗的减小而增加。
With experiments and theoretical simulations the modal analysis and frequency response characteristics of the bending vibrator in 5 ～30 kHz are investigated. The experimental results and theoretical simulations show that there are some modes with different resonant fre quencies in certain frequency ranges. With the modal analysis results, the modes of vibration with one working frequency range can be identified directly. The resonant frequencies increase with the intermediate part length decreasing, thickness increasing, elastic parameter value increasing and medium acoustic impedance decreasing.
出处
《测井技术》
CAS
CSCD
北大核心
2009年第5期421-424,共4页
Well Logging Technology
基金
国家自然科学基金面上资助项目(40574049)
国家青年自然科学基金资助项目(40804020)
关键词
声波测井器
弯曲振子
模态分析
实验
谐振频率
acoustic logging tool, bending vibrator, modal anlysis, experiment, resonant fre-quency
