noise-reduced propeller 中文意思是什麼

noise-reduced propeller 解釋
低噪聲推進器
  • noise : n 1 聲音,聲響。2 叫喊;嘈雜聲,噪音;喧鬧聲;吵鬧,騷動,騷擾。3 〈古語〉謠言,風聲。4 〈美國〉...
  • propeller : n. 1. 推進者。2. (汽船、飛機的)螺旋槳,推進器;暗輪汽船。
  1. The submarine noise detected by sonar consists of two parts : propeller - generated hydro - dynamical noise, which can be greatly reduced by improving the submarine rear shape ; radiated noise from the submarine structure excited by the centrifugal forces ( moments ) of rotatory machine, which is more complicated and influenced by many factors

    聲納所探測的潛艇噪聲包括兩部分,一是螺旋槳運轉帶來的水動力噪聲,二是潛艇主機工作時產生的不平衡力和力矩引起潛艇結構振動,帶動流場振動從而輻射噪聲。通過改進潛艇尾部線型設計,已將水動力噪聲降到比較低的程度,而結構噪聲則復雜得多,與許多因素有關。
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