| 复杂隔振结构激励下弹性基础振动及声辐射分析 |
| |
| 引用本文： | 孙瑶,杨铁军,梁伟龙,陈冰,黄迪.复杂隔振结构激励下弹性基础振动及声辐射分析[J].振动工程学报,2015,28(6). |
| |
| 作者姓名： | 孙瑶 杨铁军 梁伟龙 陈冰 黄迪 |
| |
| 作者单位： | 哈尔滨工程大学动力与能源工程学院,哈尔滨工程大学动力与能源工程学院,哈尔滨工程大学动力与能源工程学院,哈尔滨工程大学动力与能源工程学院,哈尔滨工程大学动力与能源工程学院 |
| |
| 基金项目： | 国家自然科学基金资助项目(51375103) |
| |
| 摘 要： | 针对隔振结构-弹性基础耦合结构向外声辐射问题,本文采用刚体理论及改进的傅里叶级数方法建立以任意边界弹性板为基础的双层隔振耦合结构数学模型。采用瑞利-里兹方法得到整个耦合结构的强迫振动响应,继而通过提取表面振速分布计算基础弹性板向外的辐射声功率。结合隔振结构的布置情况,以隔振器安装点的振动作为表征,探讨了耦合结构振动模态与基础板声辐射模态之间的耦合对应关系。最后计算并分析了基础边界条件对基础板向外辐射声功率的影响。
|
| 关 键 词： | 双层隔振 弹性基础 耦合结构 声辐射 边界条件 |
| 收稿时间： | 2014/12/8 0:00:00 |
| 修稿时间： | 2015/11/27 0:00:00 |
Vibration and sound radiation from a flexible base excited by a complex vibration isolation structure |
| |
| SUN Yao,YANG Tie-jun,and.Vibration and sound radiation from a flexible base excited by a complex vibration isolation structure[J].Journal of Vibration Engineering,2015,28(6). |
| |
| Authors: | SUN Yao YANG Tie-jun and |
| |
| Affiliation: | Power and Energy Engineering College,Harbin Engineering University,,, |
| |
| Abstract: | The mathematical model of a double-stage vibration isolation system mounting on a flexible plate was established from the viewpoint of energy in this paper. The masses of double-stage vibration isolation system were regarded as rigid bodies whereas the flexible base plate was described using a modified Fourier series expansion which permits arbitrary boundary conditions. By using Rayleigh-Ritz method, the forced responses of the coupled structure could be obtained and the sound radiation power from the base plate could be evaluated employing Rayleigh integral. Furthermore, the coupling between vibration modes of the coupling structure and sound radiation modes of the plate was discussed. In addition, the influence of boundary conditions upon sound radiation was analyzed. |
| |
| Keywords: | double-stage vibration isolation flexible base coupling structure sound radiation boundary condition |
|
| 点击此处可从《振动工程学报》浏览原始摘要信息 |
|
点击此处可从《振动工程学报》下载全文 |
|
