box-shape structure造句

• In view of this case , the paper mainly studied sound radiation properties of structure , sound source identification methods , main factors affecting frame radiated noise and the common way to control the noise radiated by rotary machines . the detail research shows as fellows : ( 1 ) study on sound radiation properties of box - shape structure
  根据这种情况，本文以旋转机械结构噪声为主要对象，比较系统地对结构声辐射的性质、声源识别方法、结构声的主要影响因素以及旋转机械结构噪声控制的普遍方法进行了研究，具体研究内容如下： ( 1 )箱形结构声辐射性质的研究。
• Taking gear case as research object , we studied the sound radiant efficiency of complex box - shape structure under practical stimulation by experiment , mainly observed the difference of sound radiant efficiency between the complex structure under practice stimulation and the known simple structure
  以变速箱为对象，对实际激励条件下箱形结构的声辐射效率进行了试验研究，重点考察了这种结构在实际激励下的声辐射效率同已知的简单结构声辐射效率的异同以及激励的改变对辐射效率的影响。