内燃机薄板箱体部分覆盖阻尼层技术研究  

A Study on Partial Coating Damping Layer for Thin-Wall Box of Internal Combustion Engine

作　　者：向建华[1] 廖日东[1] 蒲大宇[1] 冯慧华[1] 

机构地区：[1]北京理工大学机械与车辆学院,北京100081

出　　处：《北京理工大学学报》2010年第2期149-153,共5页Transactions of Beijing Institute of Technology

基　　金：国家"九七三"计划项目(1030021210710)

摘　　要：基于模态应变能法计算结构的模态阻尼损耗因子,提出采用模态应变能和的方法,研究部分覆盖阻尼层箱体的高应变能和区域,进而得到不同敷设参数对结构阻尼损耗因子的影响规律.并进一步应用模态局部化方法构造局部模态,控制最大应变能区域,实现阻尼材料布局的优化.研究结果表明,综合运用模态应变能和及模态局部方法,能准确得到并控制高应变能和集中区域的分布,为部分覆盖阻尼层的布局增加灵活性,且有助于降低结构质量.Based on mode strain energy used to calculate the mode damping dissipation factor,the method of mode strain energy sum is presented.The method is utilized to study the high strain energy sum zone of thin-wall box with partial coating damping layer,and the rules of influence of coating parameters versus structural damping dissipation factor are attained.Furthermore,by the introduction of localization-mode method,the structure＇s local mode and maximum strain energy zone are regulated,which realizes the optimization of damping material placement.The research results show that synthetically using the method of mode strain energy sum and localization-mode can accurately find and control the distribution of high strain energy sum,which adds the placement flexibility of partial coating damping layer and also helps to reduce the structural mass.

关 键 词：应变能和 覆盖阻尼层 阻尼损耗因子 模态局部化 薄板箱体 

分 类 号：TK421.6[动力工程及工程热物理—动力机械及工程]