模頭壽命 的英文怎麼說

Disk chuck has been adopted in 74 series vertical shaft rotary die grinders, which can grind to the internal hole, excircle of large workpieces and workpieces with shoulders. die can work and grind to r - arc without removing guede - pole, and grinder head can rotate in the range from + 45o to - 45o. accordingly, the life of die is longer than before and accuracy of the die is stable

74系列立軸圓臺模具磨床採用花盤式工作臺，可對較大工件內孔、外圓和帶有臺肩的工件進行磨削，沖模模具可以不拆導向柱進行磨削及r弧磨削，提高模具使用壽命，保證模具使用精度，磨頭可旋轉45 。

According to the model of structure fatigue damage fractal evolution, the relation between macro - damage variable, fractal damage variable and fatigue life can be found, and the fatigue damage evolution equation of ti alloy tc11 welded joint can be built, and the method of more forecast fatigue damage is given

根據結構疲勞損傷分形演化模型，通過對tc11鈦合金焊接試件的疲勞試驗和疲勞斷口分維數測量，得到了宏觀損傷變量和分形損傷變量與疲勞壽命的關系，建立了tc11鈦合金焊接接頭的疲勞損傷演化方程。給出了進一步疲勞損傷量預測的方法。

On the basis of finite element numerical simulation technology and s - n curve data base of welded joint, the course of fatigue test of physical prototype was simulated with computer and the fatigue life of welded structure was predicted, so as to let the development of anti - fatigue design becoming possible in the designing stage of product

基於有限元數值模擬技術及焊接接頭s - n曲線數據庫，在計算機中模擬物理樣機的疲勞試驗過程，預測焊接結構的疲勞壽命，使產品在設計階段開展抗疲勞設計成為可能。

On - line monitoring of hvcb is the precondition of predicting maintenance, is the key element of reliable run, and is the important supplement to the traditional off - line preventive maintenance in fact, the faults are made by hvcb, no matter in number or in times, is over 60 % of total faults so it has determinative importance for improving the reliability of power supply and this can greatly decrease the capital waste used by - dating overhaul in this paper, the inspecting way of hvcb mechanism characteristic is discussed the concept of sub - circuit protector is presented, the scheme that we offered has been combined with sub - circuit integrality monitoring theory, to ensure that it has the two functions as a whole according the shut - off times at rated short circuit given by hvcb manufacturer, the electricity longevity loss can be calculated in each operation, and the remained longevity can be forecast too an indirect way for calculating main touch ' s temperature by using breaker shell temperature, air circumference temperature and breaker ' s heat resistance is improved in this paper, and main touch resistance can be calculated if providing the load current msp430, a new single chip microcomputer made by ti company, is engaged to develop the hardware system of the on - line monitoring device, and special problem brought by the lower supply voltage range of this chip is considered fully

高壓斷路器所造成的事故無論是在次數，還是在事故所造成的停電時間上都占據總量60以上。因此，及時了解斷路器的工作狀態對提高供電可靠性有決定性意義；並可以大大減少盲目定期檢修帶來的資金浪費。本文論述了斷路器機械特性參數監測方法；提出了二次迴路保護器的概念，並將跳、合閘線圈完整性監視和二次迴路保護結合起來，給出具有完整性監視功能的二次迴路保護器實現方案；根據斷路器生產廠家提供的斷路器額定短路電流分斷次數，計算每次分閘對應的觸頭電壽命損耗，預測觸頭電壽命；提出根據斷路器殼體溫度和斷路器周圍空氣溫度結合斷路器熱阻來計算斷路器主觸頭穩態溫升的方法，並根據此時的負荷電流間接計算主觸頭迴路的電阻；在硬體電路設計上，採用美國ti公司最新推出的一種功能強大的單片機msp430 ，並充分考慮該晶元的適用電壓范圍給設計帶來的特殊問題；在通信模塊的設計中，解決了不同工作電壓晶元之間的介面問題，並給出了直接聯接的接線方案。

The result shows that the fatigue life of interference - fitcomposite joint is greatly longer than that of sliding - fit composite joint ; the fatigue life of interference - fit composite joint is affected highly by interference quantity ; the optimum quantity of interference to the studied joint model is 1 % ~ 1. 4 %

研究結果表明：復合材料干涉配合接頭的疲勞壽命遠遠高於間隙配合接頭的疲勞壽命；干涉量對復合材料干涉配合接頭的疲勞壽命有較大影響，所研究的干涉配合模型的最佳干涉量為1 % ~ 1 . 4 % 。

According to the stress spectrum of weaking section in fatigue test and s - n curve of classic welding joint in this section, we establish a model of life calculating by the principle of fatigue damage equivalence, then we get the relationship between the cross sustaining device ' s actual utilizing life and the load recycle number in fatigue test

根據疲勞薄弱部位在室內疲勞試驗中的應力譜及該部位典型接頭的s - n曲線，按照疲勞損傷等效原則建立交叉支撐裝置的壽命預測模型，得到了交叉支撐裝置實際運用壽命與室內疲勞試驗加載循環次數的關系。

Experimental data indicate control system can correct completion the rise or fall of voltage transformer and the throw or cut of capacitor - group, prevent equipments from frequently regulated and shakes, raise the lifespan of the equipments

實驗數據表明，將模糊控制引入電壓無功綜合控制中，控制系統能夠正確的完成對有載調壓變壓器分接頭的升降和電容器組的投切，並可以避免設備頻繁調節和振蕩，提高設備運行壽命。

Taking ti alloy tc11 electron beam welded work - piece as research object, which is the conventional material of aero engine compressor blisc, the fatigue damage evolution law of fatigue damage action in the area of welded joint based on damage mechanics theory is analysed, and fatigue damage model, which macro - parameter and micro - damage characteristics are related, with fractal geometry - a new conception of modern mathematics is set up in this paper. it tries to research the measuring method of fatigue fracture fractal dimension and the relationship of fractal damage variable with fatigue life. it also sets up the welded joint fatigue damage fractal evolution equation

本課題以航空發動機壓氣機葉盤常用材料鈦合金（ tc11 ）電子束焊構件為研究對象，對焊接接頭的疲勞破壞行為，基於損傷力學理論分析其疲勞損傷演化規律，應用現代數學的新概念? ?分形幾何學理論，建立宏觀參量與細觀損傷特徵相聯系的疲勞損傷模型，研究疲勞斷口分維數測量方法以及分形損傷變量與疲勞壽命之間的關系，建立焊接接頭疲勞損傷分形演化方程。