變阻器合金 的英文怎麼說
中文拼音 [biànzǔqìgějīn]
變阻器合金
英文
rheostat alloy-
The discovery of the colossal magnetoresistance ( cmr ) in hole - doped perovskite manganites ra1 - xmxmno3 ( ra is a trivalent rare - earth ion and m is a metal ion ) has attracted much attention since 1989 due to not only its technological applications in magnetic recording and sensor, but also the effect of the strong correlation concerning metal - insulator transition in the field of basic research. since then, several physics models have been suggested to explain the mechanism of cmr. however, the exact mechanism of cmr remains to be done
自1989年在摻雜鈣鈦礦型錳氧化物ra _ （ 1 - x ） m _ xmno _ 3 （其中m為金屬離子， ra為三價稀土離子）中發現龐磁電阻（ cmr ）以來由於其在磁記錄、磁傳感器等方面潛在的應用前景，以及金屬?絕緣體相變等所涉及的強關聯效應，使該類化合物吸引了物理學界的廣泛注意。We select ni / cr alloy resistor as element together with ceramic embedding hearth ; select small flat - and - disc heat - even hubby ceramic sample holder, select ni / cr & ni / si thermoelectric couple ( type k ) as thermoscope with threads 0. 5 mm in diameter which is installed in the middle of the holders symmetrically ; select aluminum silicate fire - retardant fiber as materials for heat preservation ; design some hardware, for example temperature controller & transporter, signal amplifier etc ; design controlling curve to heat stove ; and introduce the method of least squares nonlinear regression and subsection function to deal with data. in order to obtain the reasonable operation conditions and operation curve, we have also done many theory analysis and experiment discussions
通過理論和試驗探討，選用鎳鉻合金電阻絲作為加熱元件，配以陶瓷質埋入式爐膛；選用陶瓷質小尺寸扁平?圓盤均熱塊體型樣品支持器；選用0 . 5mm絲徑鎳鉻?鎳硅熱電偶（ k ）作為測溫元件；熱電偶對稱安置在樣品支持器容器的中部；選用硅酸鋁耐火纖維作保溫材料；合理選用和設計了溫度控制器、溫度變送器、信號放大電路等硬體；採用升溫曲線來控制爐膛供熱過程；採用最小二乘法非線性回歸與分段函數相結合的曲線模擬方法，進行圖形處理。The paper studied controlling rotor vibration with the super - elasticity of sma and sfd, set up the new equation of sys tern vibration according to the stress - strain curve of sma in super - elasticity state, used the nonlinear theory and the dynamic stability theory to study the vibration of rotor controlled by sma, discussed the stability condition of the system, obtained the relationship of system parameters when bifurcation was appeared, supposed a method that improves the stability of rotor system and restrains vibration amplitude though changing parameters, and finally validated the effect of restraining vibration of the improved system through emulation
摘要研究利用形狀記憶合金的超彈性和擠壓油膜阻尼器控制轉子振動，利用形狀記憶合金在超彈性狀態下的應力應變曲線，建立了新的系統振動方程，運用非線性理論和運動穩定性理論研究轉子在形狀記憶合金控制下的振動狀態，討論了系統的穩定性條件，獲得系統發生分岔時系統參數之間的關系；並提出了通過改變參數來提高系統穩定性和抑制振幅的方法，最後通過模擬驗證了改進后的系統振動抑制效果。Based on the test, a new type of sma damper is designed and its theoretical model is set up. then, a detailed experimental investigation is carried out in order to get a full understanding of working performance of the damper, from which the effects of strain level, temperature, as well as frequency and pre - strain of sma wires are taken into account. the theoretical model is verified by the experiments
在此基礎上，本文設計了一種新型形狀記憶合金被動耗能阻尼器，建立了阻尼器的理論模型，通過試驗研究了阻尼器的工作性能，分析了位移幅值，加載頻率，工作溫度和記憶合金絲預應變對阻尼器的等效剛度，單位循環的耗能和等效阻尼比的影響，並與理論分析結果進行了對比，驗證了理論模型的正確性。The study result is listed as follow : the transformation pseudo - elasticity property of shape memory alloys is simulated exactly with the above mentioned method of value calculation. the shape memory alloys re - centring damper presents typical " double flag " hysteretic curve, and the result accords with the theory analysis. the property of above new isolation device is excellent, the seismic response of the super - structure is significantly reduced, and the fully re - centring capacity after earthquake is obtained
研究結果表明，文中所提的數值求解方法能夠反映形狀記憶合金相變偽彈性的基本特徵；形狀記憶合金自復位阻尼器在循環荷載下呈現出典型的雙旗型滯回曲線，程序的模擬結果與理論分析相吻合；這種新型隔震裝置的性能優良，既可以大大減輕地震對上部結構的影響，同時也具有很好的震后自復位功能。分享友人