基于局部坐标的载荷传递  

LOAD TRANSFER IN LOCAL COORDINATES SYSTEM

作　　者：李立州[1] 张珺[2,3] 李磊[4] 岳珠峰[4] 

机构地区：[1]中北大学机电工程学院,太原030051 [2]太原大学教育学院数学系,太原030001 [3]太原科技大学应用科学学院,太原030024 [4]西北工业大学力学与土木建筑学院,西安710072

出　　处：《机械强度》2011年第3期423-427,共5页Journal of Mechanical Strength

摘　　要：为解决界面网格不一致时温度、气压和变形等数据在结构网格和流场网格之间相互传递问题,提出一种基于局部坐标投影的载荷传递方法。将复杂的耦合界面分解为若干个几何简单的面,为每个面定义适当的局部坐标系,在此局部坐标系中定义三维几何坐标向二维参数坐标变换的投影关系,实现三维空间的载荷分布向二维参数空间的变换。在此基础上进行耦合界面的载荷插值传递,以此实现参数空间的载荷传递。比较以往的参数空间插值传递方法,文中的方法定义参数投影的算法简单,计算速度快,插值的精度与以往的方法相同。为验证所提方法,文中进行了算例分析,结果表明该方法有很好的准确性和精度。A load transfer method is proposed for data of temperature,pressure and displacement etc.,transferring between dissimilar CSM（computational structural mechanics） and CFD（computational fluid dynamics） interface meshes involved in loose coupling solid-fluid problems.The method divides complex interface into several small-simple faces and defines each face a local coordinates system.For each face a mapping algorithm is built to project the 3D face into a 2D parametric space.By this way load data distribution in 3D space is projected into 2D parametric space.Then,interface load data can be transferred in parametric space.Comparing with former load transfer method,the mapping procedure is simplified and accelerated in the proposed method with the same load transfer accuracy.To verify the proposed method,a pressure transfer problem is provided at the end.The results show the method is accurate and precision.

关 键 词：流固耦合 载荷传递 曲面拟合 局部坐标 

分 类 号：TP301[自动化与计算机技术—计算机系统结构]