質點 的英文怎麼說

中文拼音 [zhídiǎn]
質點 英文
mass point; material particle; material point; point particle; point unit; [力學] particle
  • 質 : Ⅰ名詞1 （性質; 本質） nature; character; essence 2 （質量） quality 3 （物質） matter; substance;...
  • 點 : Ⅰ名詞1 （液體的小滴） drop （of liquid） 2 （細小的痕跡） spot; dot; speck 3 （漢字的筆畫「、」）...
  1. A central force is defined as a force acting along the line joining a particle or object to a center of force.

    輳力就是沿著質點（或物體）向力心連接線方向作用的力。
  2. So this base isolation technique has profound prospects. unfortunately there exist definite difficulties in the calculation because of the nonlinear of the base friction force. now, both the equivalent damping method and the numerical calculatin of the vibration response of the base - isolated buildings are frequently used in the calculation of the seismic response of the base - isolated building. however both of them have certain drawbacks. in this paper, the response of the building with base - isolation system is derived by the method of fourier expansion for the friction force and the earthquake response. at the same time, the sliding vibration character of inertia of a single mass structure and the sliding vibration response of a muti - mass structure are discussed. the stable condition of the sliding base isolation system of a structure is given. in the end, two circes of base fixation and base sliding are analyzed by adopting ansys

    本文利用對摩擦力和地震響應進行付氏級數展開的方法導出了基底具有摩擦隔震系統的地震反應。同時，文中從研究單質點結構的滑動振動慣性力入手，進而對多質點結構體系滑動振動反應進行探討，分別給出了結構滑動隔震的自身穩定條件。最後，本文利用ansys對基礎固定和基礎滑移隔震兩種工況進行了動力模擬模擬分析，進一步證實了基礎滑移隔規律。
  3. When a train of waves travels from left to right, the particles revolve clockwise in these paths.

    一列波從左向右通過液體時，質點在這些路徑上沿順時針方向繞轉。
  4. Composed of particles that do not cohere. used of soil

    無內聚性的由不能粘著的質點組成。用於土壤
  5. Collisions need not always act to slow particles down.

    碰撞並不往往使質點減速。
  6. The molecules comprising this particle are continuously changing.

    組成該質點的分子是連續變化的。
  7. In fig. 6-1(c), the motion of a particle is referred to by a rectangular coordinate system.

    在圖6-1（c）中，質點的運動是用直角坐標系來描述的。
  8. The particle is displaced in a flow domain.

    這質點在流動區域內運動。
  9. A particle is an ensemble of many molecules contained in a small volume.

    一個質點是包含一個小體積中的許多分子的集合體。
  10. Strip - shape underground structures such as the tunnels and tubes for various uses can be treated as a beam on elastic foundation under earthquake condition ， although there exists soil - structure interaction ， the foundation soil vibration is dominant in other words ， analysis of earthquake response of the soil is essential to this end ， simplified models ， ( i. e equivalent mass system models based on some equivalence criteria ) are proposed ， instead of a general 3 - d continuum model in this study ， equivalence criteria are proposed and the simplified models are compared the single - mass - string model is proved to be valid and therefore applied to the analysis of earthquake response of the pearl river immersed tunnel

    條裝地下結構如隧道、各種埋設管道等一般可看作彈性地基梁進行靜力及動力分析在地震條件下，結構與土相互作用，但土的振動成為主要因素為分析土的地震響應需把基土這一三維連續體作簡化處理，簡化成為等效多質點模型本文著重探討這種簡化模型的建立方法，推導等效方程，通過幾種簡化體系的分析比較，論證單質點串體系的合理性，並將其應用到廣州黃沙芳村珠江水下隧道工程的地震響應分析，為抗震設計提供依據
  11. A particle has no extent so that its position is a point.

    質點沒有廣度因此它的位置是一個點。
  12. Newton's law of gravitation refers to the force between two particles.

    牛頓的萬有引力定律指的是兩個質點之間的力。
  13. One instance of simple harmonic motion is that of the projection on any diametre of a point which describes a circular path with uniform angular velocity.

    當一質點以勻角速度作圓周運動時，則它在任意直徑上的投影的運動便是簡諧運動的一例。
  14. Global positioning system and kinematics of particle

    全球定位系統和質點運動學
  15. They were also used, for example, to determine the gravitational attraction exerted by a lamina on particles.

    例如：他們也用來確定一個薄片作用在一個質點上的萬有引力。
  16. If the reynolds number is large the flow is no longer laminar as the particles tend to move in a random manner.

    如果雷諾數很大，由於流體質點變成雜亂無章的運動流動不再是層流。
  17. Newton's law of motion as applied to the point mass is the well-known vector equation: f=ma.

    牛頓運動定律應用於質點時就得到這樣一個著名的向量方程式：Fma
  18. Being a sort of new principle micromotor in the fronitier of science. the ultrosonic motor ( usm ) is developed at recently twenty years. utilizing the stator surface particle elliptical motion excited by piezoceeramics, the usm is drived by friction force between the stator and rotor. compared with the conventional electromagnetic motor, the ultrasonic motor has the following features : high speed, high holding torque when power is off and so on. because of it ' s characteristics, the ultrasonic motor has obtained some widespread application in robots, precise instrument, house electronical appliance, sapceecraft automobile and micromechanism

    超聲波電機（ ultrasonicmotor ）是近二十年來發展起來的一種新原理電機，其原理不同於傳統的電磁型電機，它是利用壓電陶瓷的逆壓電效應使定子的表面質點產生橢圓運動，通過定子和轉子之間的摩擦力驅動轉子運動。這種新型的電機與傳統電磁電機相比，具有響應快、不受電磁干擾、結構緊湊、低速、大扭矩、斷電自鎖等優點，因而在微型機械、機器人、精密儀器、家用電器、航天器、汽車等方面顯示出廣泛的應用前景。
  19. Points p and q represent two positions of the particle.

    P點和Q點分別表示該質點的兩個位置。
  20. In this thesis, based on pershing ii surface to surface missile, a new kind of ballistic missile was designed with an additional rocket engine, which can be ignited twice. firstly, aerodynamic computational models of missile body and warhead which reentry with supersonic are built according to the task requirements ; secondly, the propulsion system model of missile is built whose first two stages are solid rocket engines and the third stage is liquid - solid combined rocket engine. the nozzle and the shape of the engine are designed to meet the needs of the populsion project ; thirdly, the trajectory model of the mass point is built and a wavy trajectory is designed & optimized ; finally, the ability of a missile ' s breaking through defence is analyzed

    以美國潘興導彈為原型，增加可兩次點火的末級發動機，改裝成具有跳躍能力的地地彈道導彈；首先，根據任務需求，建立了導彈的氣動模型，並建立了彈頭再入時高超聲速氣動模型；其次，建立了導彈推進系統模型，前兩級採用了固體火箭發動機，第三級採用了固?液組合火箭發動機，並在總體方案要求下，對發動機噴管和外形進行了設計；第三部分，建立了導彈質點彈道模型，設計了一條跳躍式彈道，並對跳躍式彈道進行了優化設計；最後，對導彈進行了突防能力分析，從分析的結果可以看出，跳躍式彈道的突防能力比常規的拋物線彈道要強。
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