In this article , the process of linear departing installation by fire work is mumerically simulated by ansys / ls - dyna , and discusses how to increase the accurateness of numerical simulation 本文采用ansys / ls - dyna软件对线性火工分离装置的爆炸过程进行数值模拟,并通过对数值模拟理论的分析和比较,探讨了进一步提高数值模拟准确性的方法。
It is concluded that the coulomb - type crack model is suitable for simulation of the interfacial fracture under mixed - mode fracture loads , however further work is still needed for improvement of its dilatancy properties 通过对数值结果的分析比较得出结论：库仑型裂纹模型比较适合模拟复杂载荷下的界面断裂行为，但是其扩容特性仍有待改善。
Comparing numerical character of above two models , it shows that the variance of atmosphere motion must be modified so the time step used in numeric simulation has no effect on numerical character of chaff clouds 对数值仿真模型的分析表明必须对大气的运动方差进行时间离散化补偿，进行离散化补偿后箔条云团的数字特征不受模拟时时间步长的影响。
Numerical simulation method has many advantages . for example , it can avoid finding an analytic solution and reflect the physical factors that affect prediction results and how the atmosphere develops 用数值模拟方法对数值模式进行敏感性分析，可以避免求解非线性方程组解析解的困难，同时又可以比较真实地反映出影响预报结果的物理因子的作用及大气的演变过程。
Through the elaborate design and comparatively furthering analysis of the numerical examples , the laws of the seepage field distribution and the slope failure mechanism due to these are furthered to be recognized when water level changed 通过对数值算例的精心设计和较为深入细致的分析，对水位变化渗流场的分布以及由此引起的滑坡失稳的机理和规律有了进一步的认识。
The numerical computation results of wave pressure on open - piled wharf deck for different parametric cases are verified by the experimental results . great progress is made on the numerical model for the study of wave slamming problem 文中对不同情形的波浪冲击问题进行了数值计算，并用物理模型试验结果对数值模型进行了验证，在建立波浪冲击问题的数值模型方面取得了重要的进展。
Numerical simulation signal and vibration acceleration signal of a roughing mill main drive speed reduction unit have been decomposed by using empirical mode decomposition algorithm ; each component has been carried on spectral analysis 摘要运用经验模式分解算法对数值仿真信号及某轧钢厂粗轧机主传动减速机振动加速度信号进行了分解，从而得到若干个基本模式分量，对每个模式分量进行了频谱分析。
At last , this paper study on the accuracy , astringency and stability of numerical integration method of simulink and point out that runge - kutta ( 4 , 5 ) formula of simulink show excellent capability of accuracy and stability during the stage of simulation 最后对数值积分方法的精度、收敛性和稳定性进行了进一步的探讨，指出本文所选用的四?五阶变步长runge - kutta法具有良好的计算精度和稳定性。
This paper studied the stability and oscillation with relations to the style of spatial mesh divieded and the differential style in time domain then concluded the adequate mesh style in space and time domains in numerical algorithm 研究了在求解域内空间网格划分和时间域划分形式及时间域差分格式对数值解收敛性质和振?性质的影响，选取了合适的数值计算格式，能使计算结果在收敛性、振?性和结果精度方面都满足工程计算要求。
To maintain the required accuracy , the implementation of the ssfm requires that the step size be selected carefully , which has been studied by many authors . however , the selective problem of the time window width , which has important effect on the numerical simulation , was rarely reported 时间窗口的选取毫无疑问对计算结果有很大的影响，然而目前针对t _ w的选取及其对数值模拟结果的影响这一方面的研究尚未见报道。
