Supersonic drag prediction has been regarded as an important problem in aerodynamic performance calculation and drag prediction is related to the feasibility of aircraft optimization design system , so in this paper , supersonic drag prediction is discussed as an important part of the optimization design system 超音速阻力的计算越来越成为气动力计算方面的一个重要问题，而阻力计算的准确程度直接关系到飞行器优化设计系统的可信性，因此本文将超音速阻力计算作为优化设计系统的一个重要部分进行了分析。
In recent years , plentiful and substantial fruits achieved by the lb method in simulations of hydraulics , multiphase flows , flows in porous media and heat transfer as well as magnetohydrodynamics , have revealed a broad perspective of application of this method , it will become a powerful competitor to the conventional approaches . in order to absorb the recent achievement in theory and application of the lb method , explore new ways in hydraulic computation to promote the development of practice , some work is car ried out in this thesis , as following : advances in the theory research and application , deductive process of the d2q9 model and some other commonly used models of the lb method are summarized . based on the hydrodynamic and general boundary conditions , a new joint boundary condition is presented , it integrates advantage of the two conditions above and obtains very good results in dealing with all kinds of boundaries of flow fields 为了消化和吸收近年来lb方法在理论和应用方面的新成果，探索在水力计算方面的新途径以促进lb方法实用化的发展，本文进行了下列研究工作：综述了lb方法在理论研究和实际应用方面的新进展，以及d2q9模型的推导过程和其他一些常用的模型；在水动力边界条件和通用边界条件的基础上提出了一种新的联合边界条件方法，它综合了上述两种边界条件的优点，在流场的各种边界处理中取得了非常好的效果，经过模块化的处理以后这种边界条件具有更好的实用性；针对均匀网格的lb方法计算效率较低的不足，提出了双重网格的latticeboltzmann方法，通过二维poiseulle流动、后台阶流动和渠道方槽流动三个算例的模拟，证明这种方法能够明显地提高流场模拟的计算效率；此外，根据复杂区域流场的特征提出了latticeboltzmann方法的分块-耦合算法，利用lb方法的计算特性实现块与块之间的数据交换，充分利用计算资源提高计算效率，通过对“ t ”型、 “十”型和“ x ”型分岔管道流场的模拟，展示了这种算法的特征和优点，以及它所具有的应用前景。
The method make mathcad as the software to analyze numerical value . use it strong capability of calculation to make up the deficiency of microwave . through the alternant using of calculate the different circuit structures and parameters through mathcad , to make up the calculation shortage of microwave 该方法引入mathcad作为本课题的数值分析软件，利用其强大的数值分析计算能力对不同电路结构的电路参数进行计算，弥补microwave在计算方面的不足，通过两个软件结合使用，提高设计的效率。
This text makes use of the the finite element method to solve coupling vibration of vehicle - bridge . from the flexibility commence to establish 3d model , it overcomes the limitation of traditional multi - rigid body on modeling and caculating . thereby this paper studies some problems that are difficult to traditional research method 本文利用有限元法求解车?桥耦合振动问题，从弹性体入手，建立三维空间模型，从而克服传统多刚体系统动力学研究方法在建模及计算方面的局限性，探讨了一些传统研究方法难以解决的问题。
