不同浸没深度下锥型喷嘴结构固有振动特性研究  

Study on Natural Vibration Characteristics of Typical Conical Nozzles under Different Submersion Depths

作　　者：蒲鑫 吴耀中[1] 李维嘉[1] 

机构地区：[1]华中科技大学船舶与海洋工程学院,武汉430074

出　　处：《噪声与振动控制》2017年第6期77-80,共4页Noise and Vibration Control

摘　　要：锥形喷嘴结构工作环境复杂,其浸没深度会随着工况的不同经常改变,研究不同浸没深度下锥形喷嘴结构的固有振动特性具有重要意义。利用声固耦合有限元法,得到锥型喷嘴结构的前6阶固有频率与模态振型。利用压电陶瓷作为传感器和作动器搭建模态分析实验平台,采用正弦扫频的方法,测得锥型喷嘴结构的前6阶固有频率,验证数值方法的准确性。最后利用数值方法研究不同浸没深度下锥形喷嘴结构的耦合振动特性。The working circumstance of conical nozzle structures are complex and their submersion depths vary frequently with different working conditions. So, it is important to study the vibrational characteristics of typical conical nozzle structures under different submersion depths. In this study, based on the acoustic-structural coupled FEM method, the first 6-order frequencies and modals are obtained. By using the actuators and sensors made of piezoelectric ceramics, the experimental platform is established to acquire the vibrational characteristics of the conical nozzle structures. Using sinusoidal scanning method, the first 6-order natural frequencies of the conical nozzle are measured. Comparing the numerical simulation result with the test result, the correctness of the numerical simulation is verified. Finally, the numerical method is used to analyze the vibrational characteristics of the typical conical nozzle under different submersion depths.

关 键 词：振动与波 锥型喷嘴 模态分析 声固耦合 不同浸没深度 

分 类 号：O328[理学—一般力学与力学基础] TB535[理学—力学]