查询词典 finit element method

In this method, FEM and BEM decrease the calculation time, and tetrahedral element method can avoid deformation element.

有限元和边界元相结合的方法大大减少了计算工作量和计算时间；模型中采用四面体单元剖分线性单元网格，很好地避免了传统方法中出现的准六面体畸形网格。

So the braking prescription should be performed strictly, furthermore, the sudden and urgent braking should be avoided to the best of our abilities.In the end, the thermal fatigue lives were evaluated by the finite element method. It was proved that the thermal fatigue life of improved steel (ZG35CrMoRE) was higher than that of the formers. It was also found that the quantitative evaluations of the thermal fatigue lives of brake disc were acquirable, by putting the equivalent plastic strain, which was analyzed with finite element methods, and the material mechanical property parameters into the formula of Manson-Coffon to calculate its lives. Therefore, theoretical method can be provided to develop new brake disc steel and to prolong its lives.

为了进一步提高刹车鼓的使用寿命，对新试制的钢种进行了热疲劳寿命评估，验证了改进后的钢种在相同的使用工况下具有更高的热疲劳寿命；评估结果还表明利用有限元数值分析计算相应的等效塑性应变，结合材料力学性能参数，代入Manson-Coffin热疲劳寿命公式可以对刹车鼓的热疲劳寿命做出定量评估，从而为刹车鼓用钢的研制和刹车鼓寿命的提高提供了理论依据。

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。

With long term research professor Lin and his fellow men develop theories of "mannikin analogy"、" tissue-equivalent"、"atom、molecule、big molecule design"、" technology of simulate enzyme"、" technology of inherit templet"," quasi-element equivalent method" and "light element substitute method".

经过多年的研究，林教授与其同仁创建了&人体模型的相似性原理&、&人体组织等效性的判别及测试方法&、组织等效材料的&原子、分子、大分子层次设计原理&。用仿生工程模拟酶技术和遗传模板技术成功研究出体内外能量传递和分布辐射、超声、微波、热力学、力学及复合等效的新型仿生材料。这些材料按照人体组织相应的基本元素组成，按照&准元素等效&和&轻元素替代法&避免金属元素的谱线干扰，在医疗照射能谱范围内（60KeV-20000KeV），组织等效性误差控制在5%以内。

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。

It further proves the distinct element method simulation model of charging of bell-less top blast furnace is true, and indicates this mathematics model not only has great theory research significance, but also have full practical worth. The distinct element method simulation model of charging of bell-less top blast furnace is a computer model.

本文还对实际无钟炉顶高炉开炉布料进行了离散单元法模拟研究，模拟结果与实测结果也基本符合，这进一步证明了高炉无钟炉顶布料离散单元法模拟模型的正确性，并且表明此数学模型不仅具有理论研究意义，而且具有实用价值。

It indicates the distinct element method simulation model of charging of bell-less top blast furnace may replace the model experiment that takes very long time, and spends a great amount of both manpower and material resources to research the law of charging of bell-less top. The distinct element method simulation is made for opening furnace charging of reality bell-less top blast furnace. The result of simulation is also very identical with that of measuring.

本文在高炉无钟炉顶实验模型上进行了单环和多环布料实验研究，同时运用离散单元法模拟模型对实验进行了数值模拟，得到的炉料分布和料面形状的实验结果与模拟结果相当吻合，这证明了离散单元法在高炉无钟炉顶布料中的应用是可行的，并且表明运用高炉无钟炉顶布料离散单元法模拟模型可以替代费时、费钱、费力的物理模型实验，进行无钟炉顶布料规律研究。

It effectively solves the problem of contact mechanics between burden granules. The dynamic data structure that is a linked list is built to save and delete the varying data in simulation calculation process. Therefore, the distinct element method simulation model of charging bell-less top blast furnace is established in view of the distinct element method model of blast furnace burden granular.

本文首先对离散单元法的基本原理和数值计算方法进行了系统研究，针对高炉炉料颗粒介质特点，对离散单元法进行了相应改进，建立了高炉炉料颗粒运动的离散单元法基本数学模型，推导出了相应的高炉炉料颗粒离散单元法数值计算基本参数的计算公式，例如阻尼、刚度、时步等，并确定了合理的数值模拟参数值。

In this dissertation, first, based on theory of cutting tooth about the gleason spiral bevel gear, the equation of meshing in the process of cutting tooth, the surface equation of generating gear as well as the general tooth surface equation of the double circular arc spiral bevel gear, using GB12759-1991 type of double circular arc gear as a basic gear profile, a three-dimension solid model of double circular arc spiral bevel gear which has the good adaptability was carried out by used of Unigraphics software;Second, by researching of the algorithm about contact and collision as well as various contact types based upon Contacting Finite Element Method, a foundation was laid for selecting the contact type in analyzing contact stress of double circular arc spiral bevel gearing;Finally, through the connection port of PARASOLID between UG software and ANSYS/LS-DYNA software, the three-dimension solid model of double circular arc spiral bevel gearing obtained above in UG was imported into ANSYS/LS-DYNA, a finite element analyzing about contact stress of double circular arc spiral bevel gearing was carried out by applying new loading method.

本文首先基于格利森弧齿锥齿轮加工原理及切齿啮合过程中的啮合方程、产形轮齿面方程以及双圆弧弧齿锥齿轮的齿面方程，选用GB12759-1991型双圆弧齿轮基本齿廓为基准齿形，利用Unigraphics软件的建模功能，绘制了有较好适应性的双圆弧弧齿锥齿轮传动三维实体模型。其次，描述了应用有限单元法进行实体接触与碰撞问题算法的公式，研究了有限元分析中的各种接触类型以及双圆弧弧齿锥齿轮接触应力分析中所选择接触类型的依据。最后，通过UG软件和ANSYS/LS-DYNA之间的PARASOLID接口工具包，将UG软件中得到的啮合齿轮模型导入ANSYS/LS-DYNA有限元分析软件，给出一种新的加载方法，进行了双圆弧弧齿锥齿轮传动的接触应力的有限元分析。

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]。

The studies on the developing of new media are very important to the increasing of the area density of HDD and to the implementation of hybrid recoding technology.

光磁混合记录方法，是一种可以突破超顺磁极限的限制，并进一步提高硬盘记录密度和读写速率的一种新型超高密度信息存储方式。

In io, mTOR inhibition promotes T cell anergy under conditions that would normally induce priming.

体内研究中，在正常可激发免疫反应的条件下，抑制mTOR可促使T细胞无能。