| 1. | Mass - spring - dashpot system
质量弹簧阻尼器体系 |
| 2. | Then the thesis give an example of impact - absorber . the example implement the multibody design optimization method together with dynamic analysis techniques and penalty function method
并以弹簧阻尼器为例，实现了了动力学分析与惩罚函数法相结合解决多体系统最优化问题的方法。 |
| 3. | The simplified prepressing - contact spring - damping system was studied in this dissertation . the nonlinear dynamic characteristic of this system was research by experiment method
本文以简化的预紧接触式弹簧阻尼系统为研究对象，着重于用试验方法来研究系统在动态载荷作用下的非线性动力学特性。 |
| 4. | Abstract : rased on practice conditions , both the dynamic characterization of motor vehicle under random forces exciting of the ground state and methods by using damping vibration control are investigated in this paper
文摘:研究车辆行驶过程动力特性，结合实际条件，给出了车辆弹簧阻尼减振器减振效果的阻尼调置方法。 |
| 5. | Unlike the existing literature that the absorber was considered as a spring - damper - mass system and the inertia effect of the spring was neglected , the last effect was taken into consideration in this paper
在现有文献中，研究学者通常用弹簧阻尼质?系统?替换避振器，并且将避振器的弹簧惯性效应加以忽? ?计，本文则将上述惯性效应加以考虑。 |
| 6. | In the theoretical analysis , first the dynamics model of the prepressing - contact spring - damping system was established by vibration theory . then the stability of the solution of this system was studied base on the qualitative theory of nonlinear vibration
在理论分析方面，首先根据振动理论建立预紧接触式弹簧阻尼系统的力学模型，然后利用非线性振动的定性理论研究系统周期解的稳定性。 |
| 7. | In order to study the vibration in the artillery traveling more accurately and completely , a tire force model of non - linear and self - adapting stochastic contacting mark is set up , and this model provides a good method to study the driving system ' s horizontal and vertical excitation caused by the plainness road surface . the suspension of the tractor is simplified by the model of spring - damp system , and the artillery torque rod is also simplified by torsion spring
为了更准确和全面地研究火炮牵引行驶过程中出现的振动，建立了非线性自适应随机接地印迹的轮胎力学模型，该模型能很好地研究路面不平度对火炮牵引系统的垂直和纵向激励；牵引车悬架简化为弹簧阻尼系统；火炮扭转杆简化为扭簧。 |
| 8. | At last , in according to the experiment results , the interpretation of the mechanism of the slip phenomenon of prepressing - contact spring - damping system was given in this dissertation . further more , the relationship among the limit frequency , the value of prepressing , excitation frequency , the amplitude of excitation and the materiel parameter was analyzed . base on the theory analysis the limit frequency formula was given , and the contact - slip condition for engineering application was concluded
最后根据理论研究与试验分析的结果，分析预紧接触式弹簧阻尼系统产生滑移现象的机理以及共振峰值漂移现象的理论解释，并通过定性分析接触分离时的频率与预紧量、激励频率、激励力幅值以及垫层的材料参数之间的关系，提出能定量描述系统出现滑移现象的极限频率公式，总结了预紧接触式结构始终保持接触的条件。 |
| 9. | The paper discusses how to reconstruct the 3d model of alimentary canal from many medical tomographic images using the computer 3d visualization technology , explains the work principle of its operation signal gathering devices and feedback force controlling devices , and describes the mass - spring / damper simulation model used in the software emulation
主要讨论了通过计算机三维可视技术，对医学断层影像重建得到三维训练模型；并讲解系统外设实现操作量采集和力反馈的工作原理，以及系统仿真软件采用的质点弹簧阻尼物理仿真模型。 |
| 10. | Iv ) revolute joint element , nonlinear spring - damper element , 3 - d 5 points contact element are applied to simulate the revolute restriction between two caterpillar boards , suspension nonlinear vibration , contact between wheels and caterpillar boards , and contact between caterpillar boards and ground are considered respectively . drucker - prager material is employed to simulate reinforced concrete
4 、应用大幅度转动约束单元、非线性弹簧阻尼单元、三维五节点接触单元分别模拟自行火炮履带板之间的转动约束连接、悬挂非线性振动及负重轮与履带板之间的接触和履带板与地面的接触问题；根据材料非线性理论，提出利用drucker ? prager材料建立土壤的非线性有限元模型。 |
