查询词典 finite element method

Results show that to assign skeleton to 2 kinds, i.e. compact bone and cancellated bone, could not match the needs for a personalized finite element analysis; and to assign skeleton to 10 kinds of material attributes to three-dimensional model of femur could match the needs for finite element analysis.

结果提示，传统方法将骨骼分成密质骨及松质骨2种材料属性，不能满足个性化骨骼有限元分析的要求，将骨骼赋予10种材料属性即可达到有限元分析的要求。

Group of finite element analysis was divided into 2 kinds(compact bone and cancellated bone ), 10, 50, 100, 200, 400 kinds of material attributes groups based on the gray value. All models were assigned with material attributes and tested in ansys for mechanics datas of nodes on surface of femoral neck. In group of biomechanical testing, twelve specimens of femoral superior segment were treated with compressed testing to harvest mechanics datas of measuring point same as that of group of finite element analysis. Results One-Way ANOVA showed as follows.

有限元分析组在Mimics中根据灰度值将三维模型材料属性分为2种、10、50、100、200、400种后赋予材料属性，在Ansys中进行力学分析并采集股骨颈表面节点力学数值；体外力学试验组将12侧股骨上段标本进行压缩试验，采集与有限元分析组相同测试点力学数据。

Methods One normal adult male was choosed, and his left elbow joint performed in pronation and extention position was scanned by spinal CT, and the two-dimensional image was dealed with Mimics 1 0 software, the three-dimensional finite element model was built up by Abaqus 6.7 software. Finite element calculation was performed to simulate the impact of 1 000 N on the elbow joint, and the stress distribution in the radial head and coronoid were analyzed.

选取1名正常成年男性为研究对象，使其左肘关节处于旋前伸直位，行螺旋CT断层扫描，得到CT数据二维图像，采用Mimics 10.0软件系统处理，利用Abaqus 6.7建立肘关节三维有限元模型，模拟施加1000 N冲击载荷，分析冠状突及桡骨小头内应力分布情况。

To achieve the program of finite element, which apply to the two-dimensional temperature distribution of high power laserAccording to the diathermanous principles and the thoughts of finite element, the temperature distribution of the chip and the submount of high-power laser were simulated in the work.

2实现了适用于大功率半导体激光器二维温度场的有限元程序根据传热学的基本原理和有限单元的思想对大功率半导体激光器的芯片和载体的温度场进行计算机模拟了，最终求解出了总体温度刚度矩阵K_总和总体边界条件矩阵P_总，进而求解出各个节点的温度值T。

In this paper, the research object is the XM18 spherical generator, in order to improve the dynamic behavior of the machine tool, the following aspects have been studied in this thesis: Firstly, based on the elasticity theory and finite element analysis theory, the finite element models of the lathe bed, dovetail, dovetail shelf, headstock, fanlike plank and millhead shelf, which were the main parts of the spherical generator, were built up using ANSYS9.0. And based on the modal analysis theory and FEM technology, the free modal and the constrained modal analysis of the main parts were studied. Accordance to the analytical results, put forword methods to optimize the key parts.

本课题以XM18球面铣磨机为研究对象，为了提高其动态特性，本文主要从以下几个方面进行研究：首先，根据弹性力学理论和有限元分析的基本理论，利用ANSYS9.0软件建立了铣磨机的主要零部件床身、燕尾、燕尾座、主轴箱、扇形板和磨头座的有限元模型，利用有限元法对主要零部件进行了自由模态和约束模态分析，并根据分析结果对关键部件提出了改进方案。

The joint inversion of some geodynamical parameters and numerical simulating the crustal stress field is presented in this paper. The four nodes quadratic finite element in Chinese area is constructed and the "split node" technique is employed for introducing the fault parameters into the finite element computation.

讨论了利用地应力主方向和GPS资料联合反演与之相关的地球动力学参数及数值模拟地壳应力场的方法，建立了中国及其邻区的四节点有限元模型，解决了有限元数值解算中节点位移不连续的问题。

The results of numerical analysis show that the elastic modular and the poisson ratio have no effect on two-dimensional bearing capacity, but can affect the ultimate bearing capacity of three-dimensional foundations and control the convergence and precision of finite element calculation; the earth pressure coefficient controls the geostatic stress of foundation, sequentially affects the ultimate bearing capacity of foundations and the convergence of numerical calculation. When calculating the ultimate bearing capacity of undrained saturated foundation, the complete formulation exists shear locking, and reduce formulation exists hourglassing, so the hybrid formulation is suitable to imitate the geomaterial. When the soil obeys nonrelevent flow rule, the yielding function is different from potential function, and the elastic-plastic matrix of soil is asymmetric, so the unsymmetry numerical solver and appropriate finite element mesh is required.

研究结果表明，土体弹性模量和泊松比对二维基础极限承载力没有影响，但是影响着三维矩形基础的极限承载力，控制着ABAQUS数值算法的计算精度与收敛速度；地基土压力系数控制着地基土体中的地应力平衡，从而影响着二维条形基础和三维矩形基础的极限承载力和地基破坏包络面；对于不排水饱和软黏土地基，常规的完全积分单元会造成剪力自锁现象，而减缩积分单元则存在过于柔化的现象，故采用杂交单元来模拟较合适；当土体服从非关联流动法则时，屈服函数与塑性势函数之间存在差异，从而导致土体弹塑性矩阵呈现非对称性，在有限元计算中必须采用非对称数值解法，并且合理地划分单元才能对极限承载力进行准确求解。

Directly reading the 210-layer of 0.65-mm-thick consecutive CT Dicom format images of human body thoracolumbar making use of 0.625-mm isotropous resolution thin layer scanning technique into the Mimics. Defining bone organization threshold, withdrawing each outline, partitioning each edge of layer picture, edited selectively and repaired by hole processing. After a redundancy data was cleaned, the thoracolumbar 3-D finite element geometry model was acquired. Then area mesh could be kept as the document Ansys named .lis as the suffix and be introduced into Ansys software directly to mesh body, and then transferred the body mesh to mimics to assignment son the basis of CT values, once again import Ansys to establish 3-D finite element model.

将以各向同性分辨率0.625 mm薄层扫描所得的层厚0.65 mm人体胸腰段连续断层210层Dicom格式CT图像，直接读入Mimics后界定骨组织阈值、提取各层面轮廓线、图像边缘分割、选择性编辑及补洞处理，去除冗余数据，三维化处理后获得胸腰段三维几何面网格模型，将其保存为后缀名。lis的Ansys文件，直接导入Ansys有限元分析软件进行体网格划分，再将体网格转入Mimics根据CT值给予赋值，再次导入Ansys生成有限元模型。

Objective To investigate the effect of posterior pedicle screw instrumentation and determine the impact of alternative surgical strategies to provide guidance for the operation planning. Methods A detailed three-dimensional finite element model of a 40° scoliotic lumbar with pedicle screw instrument were constructed by using the commercial finite element software ANSYS.

目的 通过有限元计算与刚体动力学相结合的方法，模拟后路椎弓根螺钉系统治疗脊柱侧凸的矫形过程，研究矫形过程中的生物力学特性，探讨不同矫形策略对临床结果的影响，为脊柱侧凸的手术规划提供依据。

This study performed the three-dimensional nonlinear finite element analyses using a general purpose finite element program ABAQUS to simulate the structural behaviors of two full-scale H-beam to box-column subassemblage specimens in fire test. In the experimental program of this study, the two specimens were tested at elevated temperatures in the furnace and under the specified constant loadings, and the moment connections of the two specimens were made of fire-resistant steel and normal steel respectively for comparison.

本研究针对两支实尺寸H型梁-箱形柱接合之耐火钢与普通钢弯矩接头试体受定载加温的火害行为进行ABAQUS有限元素数值模拟，所得之数值结果分别与两支试体在大型高温炉中所进行的火害试验结果比对，以验证有限元素数值模型之正确性。

Summary In copyright infringement cases,if the alleged infringer uses or even plagiarizes the copyrighted works or parts thereof,which causes no substantially adverse effect on the normal exploitation of the work,nor does it inflict any substantial damages to the right owner,the de minis doctrine should be applied to exempt the liabilities of the defendant and seek the balance of interests between the right owner and the general public embodied by the copyright law.

在侵犯著作权案件中，如果被控侵权行为人虽未经著作权人的同意，使用甚至抄袭了受著作权保护的作品或作品的片段，但若情节轻微，未对该作品的正常使用产生任何实质不利的影响，亦未对权利人的权利造成实质性的损害，则应适用&不计琐细原则&，免除行为人的责任，以寻求在权利人利益与著作权法所体现的社会公共利益之间的平衡。

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这个新产品会成为我们最畅销的产品。