| 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. | Vibration of uniform and nonuniform rods connected to a concentrated mass
系有集中质量的均匀与非均匀弹性杆的振动问题 |
| 4. | In this article , the author stimulates some complex sites using two - phase media motion differential equations , finite element lumped - mass method and multi - transmitting formula
本文利用两相介质运动微分方程和集中质量有限元法，并结合透射边界对几种复杂场地对地震波传播的影响进行了模拟。 |
| 5. | The main contents and innovations are as follows : 1 . centralized mass method was used to get the dynamic model of the mechanism and some essential parameters of the model were solved
具体内容和创新归纳如下： 1 )利用离散化集中质量法建立了开牙凸轮机构的动力学模型，计算出了模型的基本参数。 |
| 6. | 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。 |
| 7. | 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。 |
| 8. | On the basis of the work in xie et al . 5 , xie et et al . 7 and liang et al . 8 established a dynamic repre - sentation of the groundwater table in a land surface model through reducing it to a moving boundary problem and solving it by the mass - dumped finite element method
基于以上工作,谢正辉等7 , liang等8通过将地下水位动态表示问题归归结为运动边界问题,用有限元集中质量法直接求解,建立了地下水位的动态表示模型 |
| 9. | According to two - dimension flow continuity , momentum equations , suspended sand diffusion equations and two - phase flow bed sand motion equations , hydraulic - dynamics sediment accumulation mathematical model between two impounding dams was set up by adopting the methods of weighting and concentrating masses
根据二维水流连续、运动方程、悬沙扩散方程和两相流底沙运动方程，采用加权集中质量剖分方法，建立了蓄水两坝间水动力、泥沙淤积数学模型。 |
| 10. | The frequence and modal of main stream piping were analysed under the condition of different velocity of stream and the valve taken as the centralizing mass . this paper also gives the responses of steady state under the condition that the frequency of forced vibration is 4hz 、 8hz 、 12hz respectively
将阀门作为集中质量处理，分析计算不同蒸汽流速下，某汽轮机主蒸汽管道系统的振动频率和振型，并给出了激振力频率分别为4hz 、 8hz 、 12hz时该管道系统的稳态响应。 |
