The dashpot displacement relaxes exponentially . 阻尼器位移按指数关系松弛。
2.
Mass - spring dashpot combination ; mass - spring - dashpot 质量弹簧缓冲器组合
3.
Mass - spring - dashpot system 质量弹簧阻尼器体系
4.
So the various time response histories of structures are realistically described and the seismic field - movements of the system are simulated under different working conditions such as various earthquake waves elasticity or elastoplasticity of soil and pile - soil contact etc . the linear or nonlinear characteristics of histories response of upper - lower structural parts under seismic are prominently re - shown by means of gradual meshing finite - elements for near - far fields with the 3d spring - dashpot boundary elements . based on the above analysis , many designs and tests about interactive structures may be developed accurately 该方法的最大特点是结合近、远场域的有限单元网格渐分技术，通过边界三维弹阻单元的设置，可以突出再现上、下部共同作用体系在地震作用下的全时程线性、非线性反应特性，从而为精确开展各类结构动力相互作用的设计与试验测试奠定了一定的理论基础。
