main controlling element 中文意思是什麼
main controlling element
解釋
主控制元件-
This thesis systemically researched construction project management with theory and way of system engineering. this thesis was based on the basic concept, basic character, main content of construction project management and mainly analyzed main question and reason of construction management. according to the total process of construction project management, it systemically researched and discussed the biding, setting up project office, project planning, object controlling ( including schedule, quality, safety and cost of controlling ), and it researched how to strengthen element management, contract management, information management, site management, organization coordinating, construction final accounts for realizing object of project management
根據施工項目管理必須經歷的過程，分別對項目管理過程中的承攬任務、組建項目經理部、項目管理規劃、項目目標控制（施工進度、質量、安全、成本的控制） ，以及為實現項目管理目標必須加強的要素管理、合同管理、信息管理、現場管理、組織協調和運行機制等作了系統的分析和研究，並通過案例進行論證。 -
This paper, in allusion to damage of expansion joint of bridge, introduces a sort of new structure of jointless device - semi - integral abutment jointless bridge, and establishes model of general structure finite element of this bridge, and in details analyses its qualities of stress. the model considers the interaction of superstructure - substructure - soil. resistance of the soil behind abutment adopts still soil pressure and elastic resistance when the temperature rising, but active soil pressure when dropping. analysis of qualities stress of bridge includes of action of dead load, car load, temperature load of season character. taking an 100m length pc semi - integral abutment jointless bridge as instance, the paper establishes the model of plane frame by applying large common software - anasys, and analyses it by elastane and large deformation to imitate character of stress and deformation of general bridge. at the same time corresponding models of finite element of joint bridge and integral abutment bridge are established, and unique stress and performance of structure of semi - integral abutment jointless bridge are researched by comparing and analysing character of three different models under same loading, and controlling factor of design and constitution are generalized. in conclusion, for semi - integral abutment jointless bridge, on one hand shear, moment and deflection of the main beam and axis force of substructure are approximate with that of joint bridge, and integral stifmess of structure is increased and damage of expansion joint is eliminated, on the other hand there is axis force in main beam, shear and moment of substructure are bigger than that of joint bridge. in all this type of jointless bridge has rational stress and is worth of application and popularization
半整體式橋臺無縫橋梁計算模型考慮了上部結構-下部結構-土的共同作用；臺後土抗力升溫時採用靜止土壓力加彈性土抗力，降溫時採用主動土壓力；分析橋梁受力性能時考慮了結構自重、車輛荷載和季節性溫變荷載的作用。以一座橋長100mpc半整體式橋臺無縫橋梁為實例，採用大型通用軟體ansys建立平面框架模型，進行彈性、大變形分析，模擬全橋受力和變形特點；同時建立與此對應的有伸縮縫橋梁和整體式橋臺無縫橋梁有限元模型，通過三種橋型同步加載對比分析，研究半整體式橋臺無縫橋梁獨特的受力特點和結構性能，總結其設計控制因素和構造要求。通過本文研究知：半整體式橋臺無縫橋梁主梁的剪力、彎矩、撓度和下部結構的軸力與梁式橋相近，結構整體剛度增大，併除去了伸縮縫病害；但主梁增加了軸力，下部結構剪力、彎矩較梁式橋大；綜合分析是一種受力合理有實踐和推廣價值的橋型。 -
This article main content includes : 1 ) the principle knowledge of piezoelectric material and its extensive using prospect ; 2 ) using the software of the finite element analysis, ansys, we make an analysys of the modal analysis for the experimental subject, cantilever beam ; 3 ) we give the circuit graph using in the control by the 89c51 single chip computer, the simulink result and the final result of controlling vibration
本文的主要內容包括： 1 ）簡單介紹了壓電材料的基本知識及其廣闊的應用前景； 2 ）使用了有限元分析軟體ansys對實驗品- -懸臂梁進行了模態分析； 3 ）給出了用89c51單片機進行控制時所用的電路圖以及模擬結果和抑制振動的最終控制結果。 -
The theory analysis and experiment research of giant magnetostrictive actuator ( gma ) are discussed in this thesis. the main purpose of the research is to improve the vibration controlling precision of vibration isolating platform by means of giant magnetostrictive actuator as the active vibration control element
本論文對主動振動控制中的超磁致伸縮執行器（ gma ）進行了系統的理論分析和實驗研究，旨在採用超磁致伸縮執行器作為主動振動控制元件抑制隔振平臺的振動，以提高隔振平臺的隔振精度。
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