contact n. 1.接觸;聯(lián)系;交涉。 2.〔美國〕(有勢力的)熟人;門路。 3.【數(shù)學(xué)】相切;【電學(xué)】接觸;觸頭;觸點;【無線電】通訊;【軍事】(飛機和地上部隊的)聯(lián)絡(luò)。 4.曾與傳染病接觸者;【醫(yī)學(xué)】傳染病帶菌嫌疑人。 a man of many contacts 交際廣[門路多]的人。 an auxiliary contact聯(lián)鎖觸頭。 first contact【天文學(xué)】初虧。 fourth [last] contact【天文學(xué)】復(fù)圓。 a radar contact雷達搜獲目標。 be in contact with 和…接觸著,和(某人)接近。 break contact斷開電路。 brought ... into contact with ... 使…和…接觸。 come in (to) contact with 和…接觸[沖突];碰見。 make contact 接通電路。 make useful contacts with ... 和…進行有用[利]的來往。 vt. 1.使接觸。 2.【無線電】與…通訊;與…通話。 3.〔美口〕與…交際,接近(某人)。 contact a station in America 和美國一電臺通話[接觸]。 vi. 接觸,聯(lián)系。 ★ contact 作動詞,多用于商業(yè)上或極親密的朋友之間。 adj. 1.保持接觸的,有關(guān)系的;由接觸引起的。 2.【航空】可看見地面景物的。 adv. 【航空】以目力觀察(飛行)。 int. 開動〔讓飛機發(fā)動的信號〕。
Wear test by means of friction with plane to plane contact friction by means of alternating linear sliding 用平面與平面摩擦的方法進行磨損試驗
Analysis makes known , what it is along the progressive failure process of the slop that be able to more reasonably make known steady along slope actual situation , utilize contact friction spring element 分析表明,邊坡穩(wěn)定性分析的漸進破壞法能更合理地反映邊坡穩(wěn)定的實際情況,利用接觸摩擦彈簧元可以有效地模擬這一過程。
Here , fem is applied in the analyses of i ) fiber axial stress and interphase shear stress in fragmentation tests during initially applied strain , ii ) influence of temperature on the stress transfer across the interface , iii ) modulus and thickness of the interphase and their influence on interfacial stress transfer , iv ) interfacial debonding process , and v ) fragment aspect ratio , contact friction along the interface and their influences to the interfacial stress transfer efficiency 在論文的這部分工作中,使用有限元法描述和分析了逐節(jié)斷裂試驗中初始應(yīng)變下的纖維軸向應(yīng)力和界面相剪切應(yīng)力,溫度對界面應(yīng)力傳遞的影響,界面相模量和厚度、纖維節(jié)長寬比、界面脫粘過程、界面接觸中的摩擦效應(yīng)等因素對逐節(jié)斷裂試驗中應(yīng)力傳遞的影響。
Abstract : in this paper , first fe simulation algorithms for contact search , contact constraint , and the calculation of contact and friction loads were established based on the analysis for contact friction problem in sheet metal forming . then the fe simulation model for contact friction problem in sheet metal forming was set up . at last , the efficiency & amp; stability of this model was proved to be satisfactory by the comparing numerical example and experiment results of skin stretch forming 文摘:本文在分析了板料成形過程接觸摩擦問題特點的基礎(chǔ)上,提出了接觸搜索、界面滑動約束、法向接觸力以及摩擦力計算等問題的有限元模擬算法,建立了板料成形過程接觸摩擦問題的有限元模擬模型,最后通過數(shù)值算例與飛機蒙皮拉形模擬試驗結(jié)果的比較,驗證了此模型計算精度及數(shù)值穩(wěn)定性良好。
The model from the input to the output of the piezoelectric traveling wave ultrasonic motor is established by synthetically using lagrange - maxwell equation , hertz elastic contact theory and coulomb friction theory , along with considering electromechanical coupling , influence of the interface force between the stator and rotor of the motor on the amplitude of the traveling wave inside the stator and dynamic contact friction friction force 利用拉格朗日?麥克斯韋方程以及赫茲彈性接觸理論,庫侖摩擦理論,考慮機電耦合效應(yīng),定、轉(zhuǎn)子間界面力對彎曲行波的影響及其動態(tài)接觸摩擦力,建立了壓電行波超聲波馬達從輸入到輸出的機電耦聯(lián)系統(tǒng)的數(shù)學(xué)模型。