Parametric design and variational design are the key technology in the modern CAD/CAM systems.
参数化、变量化设计已成为现代CAD／CAM系统的核心技术。
This method keeps the location base of form feature invariance during the feature modeling and editing, and it is suitable for feature parametric variational design and topological variation.
该方法使特征定位基准在特征造型过程中保持不变，且不随特征定位约束参数的改变而变化，能很好地满足参数化变动设计与拓扑结构变异的要求。
Variational design is the kernel of contemporary CAD technology. There are many solving methods for geometric constraint solving at the aim of variational design, but they all have some limitations.
变量化技术是当代CAD技术的核心，以实现变量化设计为目的的几何约束求解有多种方法，但它们都存在一定的局限性。
Leading evaluation method into design process, the generation strategies of well-constrained VGCN is discussed, and the theories of variational geometric constraints network are established.
并将该评价方法引入设计过程，研究完全约束的变动几何约束网络的生成策略，从而建立了变动几何约束网络理论。
It is intended to render a new sound theoretical basis for FEM and other variational methods and a series of new ways for blade design and modification.
本文旨在为有限元法及其它变分解法提供又一新的完善的理论基础，也为新叶栅的分析、设计和优化以及老叶栅的改型提供一系列新途径。
The optimization results meet the demands of suspension design and the targets of suspension's performance achieved their ideal variational range.
优化结果显示本文所设计的前悬架满足设计要求，悬架的性能指标参数达到了理想的变化范围。
The variational of finite element method(FEM) using the pseudo-potential function is presented to design the airfoil shape of transonic rotational flows.
本文运用赝势函数变域变分有限元方法进行了跨音速翼型设计。
Based on transformed section method, shear lag effect of continuous box girder was analyzed adopting variational principle, and compared with design code and experimental result.
基于换算截面法，运用变分原理对开裂混凝土连续箱梁的剪力滞效应进行了分析，并与规范方法和试验结果进行了对比。
Based on transformed section method, shear lag effect of continuous box girder was analyzed adopting variational principle, and compared with design code and experimental result.
基于换算截面法，运用变分原理对开裂混凝土连续箱梁的剪力滞效应进行了分析，并与规范方法和试验结果进行了对比。
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