What does the theory of plate tectonics maintain ? 这板块构造学说的理论讲些什么?
Transversely isotropic plate ; refined theory of plates ; general solution ; elasticity 横观各向同性板板的精化理论通解弹性力学
The theory of plate tectonics holds that the surface of earth is composed of a dozen or so huge crustal slabs that float on a sea of partially molten rock 板块构造论认为,地球表面由十来个巨大的地壳板块构成,漂浮在浩瀚如海的部分熔岩上。
Continental drift is now believed to reflect the movement over geological time of underlying plates in the earth ' s crust - the theory of plate tectonics 板块构造学说提出后,大陆漂移说又获得了新的含义,它反映了地壳运动和大州大洋的分布规律。
Especially in the theory of plates and shells in large deflections , perturbation method of analysis was widely applied and gave relatively precise results 尤其在求解板和壳体的大挠度问题上,正则摄动法得到了广泛的使用,并取得了比较理想的计算结果。
Forecasts of future continental motion developed slowly as offshoots of the theory of plate tectonics , which won acceptance in the 1960s and 1970s , shattering old dogmas of continental immobility 预测未来大陆块的动态,渐渐发展成地板构造论的分支,在1960和1970年代成为定论,并粉碎大陆块静止不动的旧说。
At first , the mechanical model of joint is discussed , and the constitutive relation of the rough joint , especially the bolt - supported joint , is given . then bedding slide of bedding stratified rock slope is studied adopting limit equilibrium method , and a formula of stability is brought forward . at last , the bedding stratified rock slope ' s buckling deformation and failure mechanism and its evaluating method of stability is investigated , a corresponding mechanics model is established , then detail research to this failure mode is made in theory combining the energy law and elastic stability theory of plate and beam , and an analytical solution of the yielding curve is educed from this model 文中首先对结构面的力学模型进行了一定的探讨,提出了粗糙结构面尤其是加锚结构面的本构关系;然后采用极限平衡法,研究了顺向层状岩质边坡的顺层滑动失稳,提出了其稳定性计算公式;最后,结合能量定律和弹性板梁稳定理论,探讨了工程中常见的顺向层状岩体边坡溃屈失稳时的破坏机理、变形规律和稳定性定量评价方法,建立了相应的力学模型,求出了其相应的解析解,并提出了临界坡长与最大弯曲位置的确定方法。
Based on the theory of plate tectonics and the new knowledge of continental dynamics , this paper starts mostly with tectonic analysis and then makes a comprehensive view on the characteristic of stratum composition , gold mine mineralized , magmatic activity as well as ruptures activity to discuss the yanshanian tectonic evolution of the xiaoqinling area under the regional tectonic framework of qinling orogenic belt 本文以板块构造理论和大陆动力学研究的新认识为指导,采用以构造分析为主线,结合区内地层沉积、金矿成矿、岩浆活动以及南北两侧断陷盆地形成演化等综合分析,在秦岭区域构造大框架下对小秦岭燕山期的构造演化特征进行探讨。
Based on the theory of plate tectonics and principles of that hydrocarbon basin being researched integratedly , dynamicly and comprehensively , by mease of the study which ranges from the regional structure background of yili basin formed to the yili - zhongtianshan micro plate , to the yili block , to the yili basin , the formation and evolution characteristics of the different structure units and their different controlling effects to the formation of oil and gas basis are analyzed in this dissertation 本文以板块理论为指导,以含油气盆地整体、动态、综合研究为原则,通过伊犁盆地形成的区域构造背景、伊犁?中天山微板块、伊犁地块、伊犁盆地山大到小逐级的研究,分析了不同构造单元的形成、演化特征及对盆地油气形成、演化的控制作用。
The research base on the theories of plate tectonics , use the method that oil and gas basin is analyzed integrally , dynamically and comprehensively , and obey the principle that intersection , superposition and compound of the three tectonic domains ( the paleo - asian , the tethyan and the circum - pacific ) control and influence the formation and development of ordos basin in different tectonic stages 本文以板块构造理论为基础;以含油气盆地整体、动态、综合分析研究为原则;以古亚洲、特提斯、滨太平洋三大构造域交切、叠合和复合,控制和影响着鄂尔多斯盆地在不同构造演化阶段的形成和发育为指导思想。