例句與造句

1. This thesis intends to extend the frequency range of a shaker , minimize the impact of the additional mass and stiffness on the assessment results and make the frequency property of a shaker flat
   本文旨在拓寬激振器的使用頻率范圍，減小激振器附加質(zhì)量和附加剛度對測試結(jié)果的影響，并使激振器具有平坦的頻率特性。
2. Then the general plan of underwater vibrators is put forward . in chapter 3 , combining fluid - solid coupling theory and mechanical vibration theory , we get the coupling equation of moving parts and water . the dynamic characteristics of moving parts are studied with theory of finite element , and additional mass of moving parts is found in fluid - solid coupling field , which makes vibrator ' s natural frequency descend and amplitude - frequency curve downward shift
   第三章運用流固耦合理論和機械振動學理論相結(jié)合的方法建立運動部件與水的耦合運動方程，利用有限元法對其的動態(tài)特性進行了研究，得到了在流固耦合場下運動部件存在的附加質(zhì)量，該附加質(zhì)量導致固有頻率下降，單位推力下的加速度頻響曲線整體下移。
3. It's difficult to find additional mass in a sentence. 用additional mass造句挺難的