| 1. | And then the solutions for displacement mode of scattering wave at far field and scattering cross - section are provided at the interface cavity when it is ellipse and diamond
在求解了界面孔对sh波散射的近场解的基础上，进一步研究了其远场特性。给出了界面椭圆孔和方孔的远场位移模式和散射截面的解答。 |
| 2. | An inner iterative incremental displcacement procedure on the basis of the harmonization of the deformation amid the displacement function , and an inner iterative incremental load procedure cmi the basis of tile dispacement function and the improved arc - length method are proposed
本文提出了基于变形协调与位移模式的内迭代位移增量法与基于位移模式和改进弧长法的内迭代荷载增量法。 |
| 3. | Given dynamic stress concentration factor around the interface circular lining . some examples and numerical results and illustrated , the influence of wave number , incident wave angle and combination of different medium parameters upon dynamic stress concentration factor are discussed
针对具体算例给出数据结果讨论了不同波数条件、不同入射角作用、不同的材料常数组合对界面衬砌散射波远场位移模式和散射截面的影响。 |
| 4. | Firstly , the theory of compound foundation and pile foundation are summarized in this paper . the finite element , displacement models and computational program are introduced , then how such factors as the stiffness of pile , the ratio of length and radius of the pile & replacement ratio influence the settlement of compound foundation are analyzed . there has the best modulus of pile , the best of the length & replacement ratio and some data have been obtained
首先总结了复合地基和桩基的理论和设计计算方法，对有限单元和位移模式以及有限元计算程序进行了介绍，然后分析了桩的刚度、长径比、置换率等因素对复合地基沉降的影响，证实了带承台复合地基存在最佳桩土模量比、最佳长径比和最佳置换率，并得出了相应的数值可供工程实践参考。 |
| 5. | A new four - node axisymmetric element ach8 is derived based on the combined hybrid variational principle , which uses wilson ' s displacements and linear stress suffering from energy compatibility . the resulting element exhibits excellent results in displacements and stresses and is suitable for nearly incompressible materials without any locking phenomena , insensitive to mesh distortion
本文首先基于组合杂交变分原理推导出4节点的轴对称元ach8 ，其位移插值采用wilson非协调位移模式，应力在等参坐标系下采用关于wilson位移完全能量协调的不完全线性多项式。 |
| 6. | The deformation of parallel buried pipelines and perpendicularly crossing buried pipelines induced by pipe jacking is analyzed by 3 - d fem . the displacement pattern of buried pipelines and its influence factors are studied . the measures for protecting neighborhood underground pipelines and relevantly controlling measures for minishing the ground movements during pipe jacking are advanced
采用ansys程序进行了三维有限元建模，模拟了顶管施工对相邻平行地下管线和垂直交叉地下管线产生的影响，研究了地下管道的位移模式，对影响地下管线位移的主要因素进行了分析，提出了顶管施工中对邻近地下管线的保护措施以及减小地层移动的控制措施。 |
| 7. | Secondly , the effort is made to develope new type of transition element for multi - scale fatigue damage simulaton of long - span structures for the transition between elements for the hot spot stress analysis and the structural element . the linear and piecewise linear interplotion function for displacement interplotion are used for the transition element formulation according to the displacement compatibility requirement between element interfaces
在综合已有的构造过渡单元模型关于位移插值形式的基础上，通过采用分段线性位移插值模式和线性位移插值方式，并在位移模式中引入非协调位移模式，强迫构造单元通过分片试验，构造了一种用于疏密网格单元连接过渡单元。 |
| 8. | Based on the assumed vertical displacement of the unit cell and the assumed distribution on the pile - soil interface of the pure friction pile , and using the boundary conditions that there was no relative slipping between pile and soil , the pile decrement was equal to that of soil on the pile - soil interface and that the vertical sheer stress of the unit cell ' s outer edge was equal to zero , the formula for the frictional distribution of the pure friction pile and the formulas for the displacement of pile and soil in the treated area were deduced
通过假定的单元体竖向位移模式和纯摩擦桩桩侧摩阻力分布模式，利用桩土间无相对滑移、桩土界面处桩土压缩量相等和单元体边界处竖向切应力为零等边界条件，推导出复合地基纯摩擦桩桩侧摩阻力分布的具体表达式，以及加固区桩土压缩量的计算公式。 |
| 9. | With a suggested displacement model , this dissertation takes the interaction of soil and piles into consideration and derives an analytical - function of compressive deformation of stabilized layer of composite foundation under embankment . analytical - functions are also derived of frictional resistance between pile and soil and of the pile - soil stress ratio
本文在假设的位移模式下，考虑桩土相互作用，通过力学推导，得到了路堤荷载下复合地基桩侧摩阻力、加固区桩间土压缩量和桩土应力比的解析表达式。 |
| 10. | A curved beam element is proposed for the elastic and elasto - plastic large - displacement analysis of thin - walled curved beams based on the new developed nonlinear theory . using polynomial displacement functions , the proposed element includes the second order effect associated with geometric and material nonlinearities
基于新的曲梁非线性理论，提出了一种以多项式作为位移模式，可以同时考虑几何和材料非线性的薄壁曲梁单元，用于曲梁的弹性和弹塑性问题分析，并编制了相应的有限元程序。 |
