| 1. | A study of motion periods of two nonlinear elastic springs
两类非线性弹簧振动周期的研究 |
| 2. | Other examples of systems where conservation is used to derive the model equations ( in nonlinear elasticity , fluids , etc
其他用守恒导出模型方程的系统（非线性弹簧，流体力学等等） 。 |
| 3. | In this paper , the dynamic performance of vehicle suspensions having a non - linear variable stiffness spring instead of conventional one were studied
摘要研究了非线性弹簧车辆悬架系统的动态特性，主要从理论上分析了用变刚度弹簧代替定常刚度弹簧后悬架的动态特性。 |
| 4. | In the paper , friction energy dissipation is discussed mainly . using nonlinear spring element and combination element , the finite element model of friction energy dissipating brace frame is established
本文针对摩擦耗能这一减震形式进行讨论，采用非线性弹簧单元、组合单元建立摩擦耗能支撑框架结构的有限元模型。 |
| 5. | It is necessary to study the effect of weak interfacial bonding on the mechanical behaviour of metal matrix composites ( mmcs ) , the micromechanical finite element method and the nonlinear spring element for the interface are employed to predict the effective behaviour of mmcs
论文采用非线性弹簧元模拟界面，用细观力学有限元法计算分析了不同界面特性下弱界面粘结的纤维增强金属基复合材料的宏细观性能。 |
| 6. | Soil springs are used around the pipe including vertical , lateral and axial soil springs to consider the interaction between the pipeline and the surrounding soil . the pipe segment near fault that usually suffers large deformation is modeled with a plastic shell element in order to consider the effect of local buckling and section deformation . to reduce the calculating time of the whole model , an equivalent spring proposed by the author is applied at two ends of the shell model
为了解决现有的壳单元方法需要大量计算机时的缺点，本论文首次从理论上把离断层较远管土之间相对变形较小的管子直线段部分的变形等效为一个非线性弹簧，将此等效边界引入到有限元模型中，使得模型中的壳单元部分主要用来分析我们所感兴趣的在断层附近发生大变形的管段，从而达到节约计算时间的目的。 |
| 7. | 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。 |
| 8. | Based on the reasonable relationship of bond - slip , by using nonlinear spring element simulating bond - slip model in columns , three - dimensional finite analysis for eccentric loading column was done with the two cases including considering and not considering the bond - slip performance between steel shape and concrete . and then the simulation results were compared with experimental results , which concluded
在合理的粘结滑移本构关系的基础上，采用非线性弹簧单元对柱中的粘结滑移进行数值模拟，分别按考虑和不考虑型钢与混凝土之间的滑移两种情况进行了三维有限元分析，与试验结果进行了分析比较，基本模拟出了构件受力性能和破环特征。 |
| 9. | The section loss of steel bars and degradation of bond intensity were taken into consideration in this study in order to establish the finite element model of corroded reinforced concrete beam through simulating the bond slip behavior between steel bar and reinforced concrete based on nonlinear spring element
摘要在考虑锈蚀引起的钢筋横截面损失和粘结强度下降的前提下，利用非线性弹簧单元模拟锈蚀钢筋与混凝土之间的粘结滑移性能，建立了锈蚀钢筋混凝土梁的有限元分析模型。 |
| 10. | It is achieved the common work of pile - soil - structure on nsas by using nonlinear bars from single pile calculation as the structure boundaries . the results show that under some 3 - d loading conditions , significant error can be induced due to the nonlinear characteristic of pile , simply using a nonlinear spring from single pile calculation as the structure boundaries
在三维受力状态下，由于桩周土的非线性，迭加原理不再适合，而目前许多有限元程序只是简单地把单桩计算得到桩头等效非线性弹簧作为结构的边界条件，这样将导致出现比较大的偏差。 |
