| 1. | The lumped mass matrix is a diagonal matrix .
集中质量阵是一个对用阵。 |
| 2. | Neglect the axial deformations and consider only the lumped masses .
略去轴向变形不计，仅考虑集中质量。 |
| 3. | Lumped mass matrix
集总质量矩阵 |
| 4. | Last , the 2 - d lumped mass nonlinear model is established to simulate the dynamic soil - box foundation - frame structure interaction system , and the variables separated nonlinear parameters fitting method is proposed
最后,建立了土-箱型基础-框架结构相互作用系统的非线性计算模型,并提出了变量分离的非线性参数拟合法。 |
| 5. | Then , the discussion of the influence of linear part , the lumped mass of the rigid links and the angular acceleration of flexible joint actuators on the non - linear dynamic character of flexible joint manipulator with flexible links is done
问中还就关节线性项、杆的集中质量和关节驱动加速度对关节非线性特性表现的影响进行了讨论。 |
| 6. | First , based on a field large - scale dynamic soil - box foundation - frame structure interaction system in hunan university , a 3 - d finite element model and a 2 - d lumped mass model are established in this paper
本文针对湖南大学建立的野外大比例尺土-箱型基础-框架结构动力相互作用模型,首先建立了两种分析计算模型:三维实体有限元模型和二维集中质量模型。 |
| 7. | Using the approximation form of lumped mass matrix instead of the mass matrix in finite element discretization in space , backward differencing scheme in time , an implicit computational scheme is yielded , it proved the convergence estimate for this implicit scheme
对有限元离散中引起较大误差的质量矩阵，采用了近似形式的集总质量矩阵来代替，时间项采用向后差分，得到了一个隐式的计算格式，证明了计算格式的收敛性及其收敛速度估计。 |
| 8. | A numerical simulation of a planar 3r manipulator is performed . the results show that the non - linear torsion springs have important influences on the joint error and tip error of manipulators . moreover , the influences of linear part of non - linear , the lumped mass of the rigid links and the angular acceleration of joint actuators on the non - linear dynamic character of flexible joint manipulator are discussed
首先，建立了刚性杆非线性关节机器人的动力学模型，之后通过一平面3r机器人进行了数值仿真，说明了在一定情况下，关节的非线性对刚性杆机器人关节变形和末端误差具有重要影响，并在此基础上，讨论了关节线性项、杆的集中质量和关节驱动加速度对机器人关节非线性特性的影响。 |
| 9. | Third , through employing the 2 - d lumped mass model and the single period objective function inversion method developed in this paper , and taking the measured structure response to a harmonic excitation at the top of structure in field as the reversion objectives , the linear physical and mechanical parameter inversion is performed in ansys by using apdl
第三,采用二维集中质量模型和本文提出的单周期目标函数反演方法,把顶部激振下实测的结构动力响应作为反演目标,利用apdl语言,在ansys软件中实现了系统线性物理力学参数的反演。 |
| 10. | Chapter 3 deals with the lumped mass finite element methods and error estimations for fourth order nonstationary elliptic equation . chapter 4 disscusses finite element methods and error estimations for linear and nonlinear the hyperbolic equations . chapter 5 presents the lumped mass finite element methods and error estimations for the nonstationary stokes problem
全文分六章，第一章绪论；第二章论述解抛物问题的质量集中非协调有限元方法及其误差估计；第三章论述非稳态四阶椭圆方程的有限元方法及其误差估计；第四章论述线性与非线性双曲型方程的有限元方法及其误差估计；第五章论述stokes问题的质量集中有限元方法及其误差估计；第六章论述管道bingham流的质量集中有限元方法及其误差估计。 |
