The zero state response to an arbitrary excitation in a fist order circuit can be solved by either the convolution integral or the three element method.
一阶电路在任意激励下的零状态响应，既可以用卷积积分法，也可以用三要素法进行分析与计算。
The discrete element method based on static relaxation is extended to three dimensional case.
将基于静态松弛解法的离散单元法推广至三维。
The static synchronous relaxation discrete element method (SSRDEM) was extended to three dimensional case.
将静态同步松弛离散单元法(SSRDEM)推广至三维。
The stress and deformation of crankshaft are calculated by finite element method with six load boundary conditions and three displacement boundary conditions.
分别采用六种载荷边界条件和三种位移边界条件对曲轴应力和变形进行了有限元分析；
Conclusion Three dimensional finite element analysis is a kind of convenient and practicable method to be used as the confirmation and supplement of experimental biomechanics study of human being.
结论三维有限元分析方法是一种简便实用的生物力学研究方法，可作为实验生物力学研究的验证和补充方法。
The response of dual laterolog in tilted anisotropic sedimentary formation was simulated with the three-dimensional finite element method.
利用三维有限元法，模拟了电性各向异性倾斜沉积岩层的双侧向测井响应。
The tank structure of mining flameproof transformer is analyzed by the three-dimensional finite element method. The optimal design of tank has been carried out.
采用三维有限元法对矿用隔爆型变压器箱体结构进行了分析，完成了箱体结构的优化设计。
The stress fields of such structure around the opening were predicted using a three-dimensional, higher-order fast multipole boundary element method.
为精确模拟该结构的应力状况，该文提出一种三维高阶快速多极边界元法。
Numerical simulations on particle mixing characteristics of spout-fluid bed were carried out in three dimensional based on discrete element method (DEM).
采用离散元方法，对喷动流化床内的颗粒混合特性进行了三维直接数值模拟。
In this paper, the interlaminar stress distributions of symmetric composite laminates with a hole are predicted by the three-dimensional elastoplastic finite element method.
本文用三维弹塑性有限元法计算了含圆孔对称复合材料层板的层间应力分布。
Using finite element analysis method, three-dimensional calculation is conducted for force summing on rod in high-inclination well of Liaohe tidal zone oilfield.
应用有限元法对辽河滩海油田大斜度定向井抽油杆柱受力进行了三维计算。
The computing method is applied to three strut, four strut and eight strut launching stands, and the result is compared with that of finite element method.
以三、四、八支柱发射台作为算例，进行了具体应用，同时还与有限元计算结果进行了比较。
Three dimensional boundary element method is applied to the solution of seepage area of groundwater in foundation pit which is not completely watertight.
本文用三维边界单元法对非完全隔水基坑的地下水的渗流域进行求解，运用内边界技术使计算简化并降低计算工作量。
Thermal-structural analysis was performed for ultrasonic wire bonding(UWB) by three dimensional finite element method(FEM).
用三维有限元方法对超声波线焊进行了瞬态的热-结构分析。
In theoretical investigations, elastic strain energy method, fiber inclination model, three cells model and finite element model etc. are introduced.
在理论研究方面，介绍了弹性应变能法、纤维倾斜模型、三细胞模型和有限元模型等工作。
Methods: Three-dimensional anisotropic finite element method.
方法：三维各向异性有限元法。
In this paper, the natural frequencies and modes of box water body researched by using three-dimensional finite element method.
本文运用三维有限元方法离散水体，研究了箱形术体的自振频率及动水压力振型。
By simulating the features of two -, three -, four-high mill with finite element method, the geometric shape, micro-structure and mechanical property of wire section are analyzed.
分析了用有限元法模拟线材二辊、三辊和四辊轧机轧制的特点，对线材断面的几何形状、微观组织和机械性能进行了介绍。
METHODS: Three-dimensional finite element method was used to analyze the initial stress around screw implant of different elastic modulus and different diameter.
方法：用三维有限元的方法对不同弹性模量和不同直径种植体植入后骨界面的初始应力进行分析。
According to the characteristics of loads on blades, a model for estimating fatigue life of blades is presented based on three-dimensional finite element method and improved local strain method.
根据汽轮机低压叶片所受载荷的特点，建立了一种基于三维有限元法和改进局部应力应变法的叶片疲劳寿命预测模型。
Using a spatial composite finite element method, combining three-dimensional solid element and bar element, the mechanical analysis of a two-span curved PC continuous box girder bridge is conducted.
采用三维实体单元和杆单元相结合的空间组合有限元方法，对一座两跨曲线预应力混凝土箱形连续梁桥进行空间受力分析。
This paper applies the three-dimensional finite element method to the analysis of the stress for steam expanding vessel with tangential pipe, and the stress distribution has been obtained.
采用三维有限元方法对蒸汽扩容器与切向接管联接的关键部位进行了应力分析，获得了该部位的应力分布。
The paper studies distribution law of stress and strain of gate-dam under static regime with three-dimensional finite element method.
本文采用三维有限元方法，研究堰闸坝在静力状态下其应力和变位的分布规律。
At low flow attenuation performance of semi-active muffler was computed respectively by using theoretical formula and three-dimension finite element method.
低速气流时，分别进行了半主动消声器的消声性能理论计算和三维有限元法数值计算。
In this paper, finite element method of a quasi-three dimension problem was described in detail, where the stress-strain relations are linear or nonlinear.
本文详细地描述了准三维问题的有限元法，包括应力应变关系是线性的情况和应力应变关系是非线性的情况。
A calculating model of finite element method with three-dimensional beam element for subsurface pipeline was established.
建立了埋地输油管道三维梁单元有限元应力应变计算力学模型，并给出了求解方法。
The three-dimensional boundary element method for elastic materials was extended to develop a fast multipole expansion formulation of the fundamental solutions for quadratic elements.
在三维弹性力学边界元法的基础上，推导出二阶单元的基本解快速多极展开格式。
This paper deals with the numerical simulation analysis of hot extrusion forming process of the Hooke's Joint using three-dimensional elastoplastic finite element method.
采用三维弹塑性有限元法对虎克式万向节热挤压成形过程进行了数值模拟分析。
The finite element method is used for the three-dimensional flow field calculation in designing centrifugal pump impellers.
为进行离心泵叶轮的三元设计，用有限元方法解决了离心泵叶轮三元流场的计算问题。
The finite element method is used for the three-dimensional flow field calculation in designing centrifugal pump impellers.
为进行离心泵叶轮的三元设计，用有限元方法解决了离心泵叶轮三元流场的计算问题。
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