查询词典 finite element method

The stress analytic method of arch dam covers pure arch method, arch beam sharing method, finite element method, calculating method of shell theory and structural model test method.

拱坝的应力分析方法包括纯拱法、拱梁分载法、有限元法、壳体理论计算方法和结构模型试验法。

Second order incident boundary condition on fixed incident boundary is derived for numerical simulations, based on the cnoidal or sinusoidal motions of wave maker paddle, which shows that the prediction with second order incident boundary condition is more accurate than the prediction with first order incident boundary condition. 2 The analytical solution for higher-order Boussinesq equations is derived and its applicable range is discussed. 3 A 2-D fully non-linear numerical model using boundary element method is developed to obtain wave forces acting on rectangular obstacle. 4 The three-dimensional fully non-linear waves are studied in a numerical wave tank using finite element method.The studies on the coupled numerical model combined Boussinesq equations with Laplace equation are following.

非耦合非线性波浪计算模型：1 根据造波板做椭圆余弦运动或正弦运动速度，推导出数值模拟波浪水槽时固定入射边界上的二阶波浪入射边界条件，数值计算结果和实验结果的对比表明采用二阶入射边界条件对波面升高的预报比采用一阶入射边界条件对波面升高的预报更为精确；2 推导了波浪水槽造波板做正弦运动所产生波浪的高阶Boussinesq方程摄动展开解析解，讨论了该解析解的适用范围；3 对整个波浪水槽应用边界元方法数值模拟了波浪对物体的非线性作用；4 用有限元法求解三维Laplace方程模拟了三维完全非线性波浪水槽。

The relevant theories of three-dimensions Element-free Galerkin method and Nonlinear Finite Element method are introduced in this paper.

摘 要：本文分别介绍了三维无单元伽辽金法和非线性有限单元法及其相关理论。

The equations of dynamics for the balance are established by Kane's method, from which derives the characteristic equation of natural frequency by means of linearization of dynamic equations, and the six natural frequencies being developed according to the theory of vibration. The law of the six natural frequencies varying with mass of the upper platform and the stiffness of the elastic element are presented,and the Finite Element Method is employed to testify the validity of theoretical results.

基于 Kane 方法研究天平的动力学及模态，通过线性化动力学方程建立天平的固有频率方程，依据振动理论推导出并联天平的六阶固有频率及其对应的振型，同时研究了天平的六阶固有频率随敏感单元刚度系数及上平台质量的变化规律，并用有限元法验证理论计算结果的正确性。

Formula. At the same time, the article raised the seismic reduction factor formula for the SSDI system.The paper adopts finite element method based on the ANSYS procedure, and realizes the simulation of soil constitutional relationship through choosing Davidenkov soil model with proper parameters and using restartup method in ANSYS. Then, the procedure makes the soil nonlinearity simulation come true byusing parameter design language of APDL. Element Combin14 is be used to simulate viscoelastic boundary and radiation damping effect. At the same time, it presents integrated damping matrix for considering the coupling of different damping of soil and structure.

文章以ANSYS为计算分析工具和平台，通过对Davidenkov地基模型的研究及其参数的选取，利用ANSYS的重新启动分析方法并采用APDL参数设计语言来编制程序，实现对土体非线性动力本构模型的模拟；同时利用ANSYS中Combin14单元模拟粘弹性边界，以此建立人工边界来模拟辐射阻尼效应；并提出集成阻尼矩阵的方法，解决结构和地基土阻尼不同而导致的阻尼耦合的问题。

Calculation of the energy release rate with finite element method is conducted. The concrete beam model is meshed using a method without need of considering the crack-tip singular element.

采用有限元分析方法对三点弯曲混凝土梁的能量释放率进行了计算，在对混凝土梁进行单元划分时，避免使用奇异性单元来模拟梁的裂尖奇异性。

For this problem, finite element method based on deep shell element( much project practice prove veracious) is taken to calculate SCF and compared with the results of the method KAW、DNV and EFT.

针对这一问题，利用基于厚壳元的有限元法（大量工程实践检验结果表明该方法计算结果相对准确）对K型管节点的应力集中系数进行了计算，并将计算结果与KAW、DNV及EFT法计算结果进行了对比分析。

4According to rationale of dynamic of structures,the program of finiteelement method that calculated largescale dynamic structure is finished.Using theprogram of finite element method,the dottier element of some model gas operatedof rapid-fire gun is calculated.

4根据结构动力学的基本原理编制了计算大型结构动力问题的有限元程序，对某型自动火炮自动机中较薄弱的元件进行了数值分析。

A numerical model of wave diffraction was established using infinite similar element method,coupled with finite element method,to obtain wave force on a vertical cylinder of arbitrary cross section.

在海岸和近海工程中，如海上平台、离岸式码头及防波堤等大型建筑物，它们的水下结构往往是由一系列墩柱组成，这类构筑物的主要外力之一是作用在它上面的波浪力[1—2]。

In the last part, analysis of the sound field around the shell of the fan is done with combining finite element method and boundary element method by using software ANSYS and SYSNOISE.

第四部分分析风机外壳周围声场，结合有限元法和边界元法，应用ANSYS和SYSNOISE软件，建立声场边界元模型。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。