最后讨论了确定多自由度体系系统动力可靠性上下限的问题。
Finally, a new method to determine the upper and lower bounds of the system dynamical reliability for MDOF is proposed.
对具有随机参数的多自由度体系，提出了求解其系统动力可靠度上、下限的一种计算方法。
The system dynamic reliability of multi-degree-of-freedom (MDOF) system with random parameters and its upper and lower bounds is discussed.
导出了桩基任意布置的复合体系的刚度矩阵，并按初始条件下的多自由度体系的自振问题进行动力分析。
Introducing six degrees of freedom the stiffness matrix of the complex system with arbitrary arrangement of piling is derived.
根据动力方程详细推导了多自由度体系等效为单自由度体系的等效方法以及能力谱和需求谱的理论计算公式。
Based on the dynamic equation, the equivalent method from MDOF to SDOF and equations of the capacity spectra and the demand spectra theories are deduced in detail.
基于有限单元法，推导出多自由度结构体系在地震作用下的增量形式的运动方程，建立了大跨度斜拉桥的地震激励模型。
The incremental motion equations of a M DOF structural system excitated by seismic waves are formulated based on FEM, and a seismic response model for cable stayed bridges are proposed.
随着计算机技术的长足进步，以及多体系统动力学这一学科的成熟，汽车模型的自由度越来越多，仿真结果越来越精确。
With the great improvement of the computer technique and the maturation of the multi-body dynamics, the multi-DOF of the automobile model was presented and the simulation results were more accurate.
基于该系统的运动学规律，将其简化为一个单自由度多体系统。
By analyzing kinematic characteristics of the system, it is reduced to a one degree-of-freedom system.
利用机械系统分析软件ADAMS建立了15自由度的DKC12地下自卸汽车整车多体系统开环模型。
The design of the 15 DOF full vehicle open loop control model for the DKC12 underground dump truck is built by ADAMS in this paper.
确定了一种将多自由的结构体系转化为等效的单自由度体系的方法。
A method of transforming a multi-degree of freedom system into a single-degree of freedom system is defined.
利用拉格朗日分析力学体系，推导了考虑转向系统刚度、轮胎侧偏刚度和转向助力等因素的线性多轴转向车辆的三自由度普适动力学方程。
Using Lagrangian analysis method, a 3-dof multi-axle steering vehicle model is established, which considers steering system stiffness, cornering stiffness and power steering system.
利用拉格朗日分析力学体系，推导了考虑转向系统刚度、轮胎侧偏刚度和转向助力等因素的线性多轴转向车辆的三自由度普适动力学方程。
Using Lagrangian analysis method, a 3-dof multi-axle steering vehicle model is established, which considers steering system stiffness, cornering stiffness and power steering system.
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