離中心載荷 的英文怎麼說
中文拼音 [lízhōngxīnzǎihé]
離中心載荷
英文
off center load-
The main results and academic contributions of the dissertation can be summarized as following : 1 ) for the difficulty to obtain the accurate analytical solution of the stress constraints around 3d cracks, detailed 3d fe analyses have been conducted to study the out - of - plane constraint factor tz around a straight through - thickness crack, a quarter - elliptical corner crack and a semi - elliptical crack embedded in an isotropic elastic plate subjected to uniform remote tension loading. the distributions of tz are minutely studied in the forward section of the cracks. strong 3d zones ( tz > 0 ) along the crack front were investigated despite the far field stress - free boundary conditions
全文主要研究內容和學術貢獻如下: 1 .針對一般三維裂紋端部場應力約束準確解析的困難，對均勻拉伸載荷作用下各向同性彈性板中穿透厚度中心直裂紋、半橢圓表面裂紋和1 / 4橢圓角裂紋進行了大量詳細的全場應力三維有限元分析，首次全面分析了非穿透裂紋端部場三維影響區范圍，給出了不同形狀三維裂紋前沿離面應力約束因子tz的數值解，並結合k場平面解給出了非穿透裂紋端部應力場k - tz雙參數描述。This research was also supposed to provide a valuable reference for the construction of 500kv eastern hangzhou transformer substation project. to guarantee the rationality of the torsion and bending load application, a set of experimental equipments was transformed from a traditional one by exerting tangential force on the brim of the fan board and conducting broad - billed roller application. in the actually fulfilled experiments on the capabilities of the members under different ratios of torsion and bending, the equipments proved to be well qualified in load applying to large - tonnage members
試驗中，為保證扭轉及彎矩荷載施加的合理性，在浙江大學工程結構試驗室原有的加載設備的基礎上，分別採用在扇形板邊緣施加切向力和寬軸承滾軸加載的方法，改造並調試出一套可專門用於大噸位構件施加扭轉荷載及組合作用的試驗設備，並利用這套設備進行了離心鋼管混凝土構件在不同彎扭比的組合作用下的試驗研究。However, it is too expensive in investment, complex in experimental techniques, difficult and dangerous in performance. in this paper to overcome these drawbacks, the similarity relations together with a new method and its principle of experiment have been developed based on the model theory of structural similarity. according to this principle, the total stress ; an be obtained as a sum of the stresses due to weight and external loading, which based on only one model experiment without any gravitational loading
最後，針對外載與自重共同作用下，傳統光彈性分析法中採用離心力場模擬重力場獲得自重應力的試驗投資耗費大、技術復雜且難度大和不安全等嚴重缺點，按照結構相似的模型理論，本文提出模型外載與自重並存變動外載的光彈性分析法，導出處理這個問題具體的相似律和試驗原理及方法，進行了典型實驗驗證，指出僅用外載作用的模型試驗，即不用離心力場模擬重力場的模擬試驗，就可以獲得上述兩種載荷共同作用下的應力分析結果。In the condition of non - axisymmetrical stage separation in hypersonic flight, the problems of dynamics and kinematics of the validating vechicle and the launch vechicle are primarily analysised. it includes the movement of the center of mass and the rigid body of the vechicles, the relative movement of the different vechicles, the relative movement of the special parts of the different vechicles, the load analysis and the probable collision in the process of stage separation
研究了在高超聲速狀態下非對稱級間分離過程中，驗證飛行器與運載火箭分離時的相關運動學和動力學問題。包括:飛行體質心運動和剛體運動;不同飛行體之間的相對運動;不同飛行體上特殊部位之間的相對運動;分離過程中各相關飛行體上的載荷分析和分離過程中可能發生的碰撞問題。On the basis of comprehensive analyses and studies, now the centrifuge concrete filled thin - walled steel tubular is regarded as one of the ideal substitutes of the traditional concrete poles, and there has been a practical call for the researches on it unfortunately, present evidence is all for the capabilities of the tube under single load but there is hardly any datum relating to those under the combined loads of bending and shearing torsion that many members applied in electric power projects inevitably bear to different extent. this paper intends to improve this situation with the experimental researches and related theoretical analyses done on the subject
在電力工程結構中，由於使用功能要求，許多結構中不同程度地存在著受扭工作狀況，及彎扭、剪扭聯合作用工作狀況，然而迄今為止，國內外對離心鋼管混凝土結構的工作性能的研究大多局限在單一荷載工況情況下，尚未見組合荷載作用的研究，因此，能否深入了解離心鋼管混凝土構件的扭轉和在組合作用下的受力特性，成為影響該結構形式能否進一步推廣應用和發展的關鍵技術問題。The main achievement of the paper is to recommend the 90 point as the best place for sensor by the contrast of numerical calculation results and test signals. on the point the high frequency disturbing signal was weakened very much when the load impulse was changed, which could be explained when vibration shape was considered
本文最重要的工作是通過數值計算與實驗的對比確定點擊脈沖荷載作用下傳感器的最佳接收位置，即距離加載點相對于管樁截面中心夾角為90的點。分享友人