阐述了3DSIS的功能和应用，提出了3DSIS与数值分析方法、专家系统耦合集成的模型。
The function and application of 3DSIS are shown. The integrated model of 3DSIS, numerical analysis method and expert system is suggested.
应用谐波平衡法对系统三阶非线性微分方程组解析分析，与数值解比较验证了解析解的正确性和有效性。
The method of harmonic balance is applied to study the non-linear dynamic response of the third-order nonlinear partial differentiation system.
应用数值分析方法对这一模型求解，得到与实验相符的杂质原子扩散分布；
Zn diffusion profiles calculated from this model with numerical method were in good agreement with the results of experiment.
这大大有助于人们对地下水数值模拟这一有力分析工具的掌握与应用。
With the tehchniques of object-oriented programming and GIS incorporated, groundwater numerical simulation realized visualization.
数值算例表明：该公式正确，使用方便，可应用于箱梁结构分析与计算。
Compared with numerical examples, it is showed that the formulae are accurate, and they can be used easily in the calculation and analysis of practical box girder structures.
为进行连续介质到非连续介质转化的数值模拟，实现结构破坏过程的仿真分析，将固定和旋转的弥散裂缝模型与变形体离散元方法结合应用于混凝土、岩石等准脆性材料的受拉开裂过程分析。
Fixed and rotating smeared-crack models based on a deformable distinct element method were developed to analyze the fracture of quasi-brittle materials such as concrete and rock under tension.
应用大型有限元分析软件ABAQUS，对工业管道间断焊与连续焊的温度场和残余应力场进行数值模拟。
Temperature and residual stress fields of industrial pipe discontinuous and continuous butt welding was simulated by ABAQUS.
在进行非线性分析与结构改型设计时，应用小片子模型数值实验技术，加快了整个细节研究的工作进程，对于工程类似大型模型计算与改进具有一定的借鉴意义。
The using of patch test in nonlinear analysis accelerated the course of the whole research, so this practice may be used for reference in analogous analysis and amelioration of large engineer models .
经与离心试验结果对比分析，验证了应用数值模拟研究盾构隧道开挖对邻近桩基影响是可靠的。
It was proved by the comparison with the results of centrifuge experiments that the study on the influence due to shield tunnel excavation on neighboring piles is reliable through numerical analysis.
经与离心试验结果对比分析，验证了应用数值模拟研究盾构隧道开挖对邻近桩基影响是可靠的。
It was proved by the comparison with the results of centrifuge experiments that the study on the influence due to shield tunnel excavation on neighboring piles is reliable through numerical analysis.
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