cushion mass 中文意思是什麼
cushion mass
解釋
氣墊空氣質量-
Consulting about foreign study, the research showed that the speed of firing can be improved by modifying the machanism of the automatic, and at the same time two problems must be solved, one is that more mechanisms should act at the same time to reduce the time of the whole actions of automatic mechanisms, the other is that the time of each mechanism ' s action should be reduced. the time can be reduced by several ways. the first one is to reduce the mass of mechanism, the second one is to increase the force applied on the mechanism and reduce the resistance, the third one is to shorten the working distance, the fourth one is to give abstention and cushion to mechanism before action ends. this thesis includes the following topics : discussion of the theory of the automatic and shell - swing design, establish the kinematic and dynamic models of the main structures in automatic and perform the corresponding mechanical analysis, set up a compendious cyclical diagram for the automatic ; the computer simulation to the navy gun ' s firing parts
由現有艦炮自動機循環圖可知，制約射速提高的幾個因素是：後座、復進佔用的時間較長，約占總循環時間的三分之一；供彈機的動作單獨佔用循環時間，且較長；輸彈機的輸彈時間較長；各機構動作重疊少；參考國內外的研究情況，本文提出了在採用改進完善現有自動機機構來提高射速時，必須考慮以下兩點： （ 1 ） 、力求在同一時間內能使更多的機構參與工作，並處理好各動作之間的銜接（即介面技術） ，以便縮短整個自動機的動作循環時間。 -
The rule of settlement and pore stress is educed too. then it is compared with the case which is found in site. finally, the paper studies the computing method of pile to soil stress ratio of rigid pile composite foundation with cuhion, and these conditions are thought that the top of pile pierce into cushion and the bottom of pile pierce into underlayer. lt is assumed that the cushion is ideal elastic mass and ideal elastic - plastic mass, then the formula is developed and all parameters " effects to stress ratio of pile to soil are discussed
最後，推導出了帶墊層的剛性樁復合地基樁土應力比的計算公式，這個公式將墊層分為彈性體和理想彈塑性體兩種情況分別進行推導，考慮剛性樁刺入墊層和下臥層的情況，並對公式進行了分析，得出了在剛性樁復合地基中樁土應力比隨著墊層模量和樁模量的增大而增大，但都有一極限值，隨樁間土模量的增大而減小，也有一極限值。
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