• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文学位 >Modeling and analysis of one-dimensional complex distributed parameter systems by the distributed transfer function method.
【24h】

Modeling and analysis of one-dimensional complex distributed parameter systems by the distributed transfer function method.

机译：一维复杂分布参数系统的分布式传递函数方法建模与分析。

获取原文
获取原文并翻译 | 示例
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

An analytical and numerical method--the distributed transfer function method (DTFM) is generalized and implemented for modeling and analysis of complex flexible systems. Complex flexible systems studied by this work are assemblages of many one-dimensional continua and lumped parameter sub-systems. This kind of systems encompass a variety of structures and machines such as automobile bodies, buildings, bridges, airplanes, robot arms, ships, gas turbines, steam turbines, and turbogenerators.; After decomposition, displacement and stress of a uniformly distributed sub-system are determined in an exact and closed-form by the so-called distributed transfer functions. All sub-systems are assembled by imposing the displacement continuity and force balance at every interconnecting point of sub-systems. No numerical approximation or series truncation is applied. As a result, the DTFM gives precise prediction of the static and dynamic behaviors of a complex flexible system. For non-uniformly distributed components, a numerical procedure (step function approximation) can be utilized with enough precision.; The DTFM is an analytical method. It gives exact and closed form solutions for general complex flexible systems. The DTFM is engaged to analyze the stress, natural frequency, mode shape, and frequency response of a complex flexible structural system. It is also engaged to calculate the critical speed, response to unbalanced mass, response to the excitation of the harmonic force fixed in space, whirl direction, and the instability of a complex flexible rotating system.; The DTFM is capable of modeling complex flexible systems with arbitrary boundary conditions and loadings. This method is systematic in modeling different systems and convenient in computer programming. It deals with matrices which are much smaller than finite element method does and needs much less computer space than the finite element method does.
机译：分析和数值方法-分布式传递函数法（DTFM）被推广并实现用于复杂柔性系统的建模和分析。通过这项工作研究的复杂的灵活系统是许多一维连续性和集总参数子系统的组合。这种系统包括各种结构和机器，例如车身，建筑物，桥梁，飞机，机器人手臂，轮船，燃气轮机，蒸汽轮机和涡轮发电机。分解之后，通过所谓的分布式传递函数，以精确且封闭的形式确定均匀分布子系统的位移和应力。通过在子系统的每个互连点施加位移连续性和力平衡来组装所有子系统。不应用数值近似或序列截断。结果，DTFM可以精确预测复杂的灵活系统的静态和动态行为。对于非均匀分布的分量，可以以足够的精度利用数值过程（阶跃函数逼近）。 DTFM是一种分析方法。它为一般的复杂柔性系统提供了精确和封闭形式的解决方案。 DTFM致力于分析复杂柔性结构系统的应力，固有频率，振型和频率响应。它也可以用来计算临界速度，对不平衡质量的响应，对在空间中固定的谐波力的激励，旋转方向的响应以及复杂的柔性旋转系统的不稳定性。 DTFM能够对具有任意边界条件和载荷的复杂柔性系统进行建模。该方法是系统建模不同系统的方法，并且便于计算机编程。它处理的矩阵比有限元方法小得多，并且所需的计算机空间比有限元方法少得多。

著录项

  • 作者

    Fang, Houfei.;

  • 作者单位

    University of Southern California.;

  • 授予单位 University of Southern California.;
  • 学科 Engineering Mechanical.; Applied Mechanics.
  • 学位 Ph.D.
  • 年度 1996
  • 页码 128 p.
  • 总页数 128
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 机械、仪表工业;应用力学;
  • 关键词

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号