| 一个新的声应力系数及其确定 |
| |
| 引用本文： | 祁皑,陈燊,陈贞钜.一个新的声应力系数及其确定[J].力学与实践,2005,27(4):0-0. |
| |
| 作者姓名： | 祁皑 陈燊 陈贞钜 |
| |
| 作者单位： | 福州大学土木建筑工程学院,福州,350002 |
| |
| 基金项目： | 福建省挂牌精品课程建设课程. |
| |
| 摘 要： | 为建立声焦散线与平面应力条件下裂尖应力强度因子的关系，定义了一个新的声应力系
数------声程差随应力线性变化的比例系数, 该系数的大小既取决于材料常数又取决于
耦合介质及声束的传播历程. 借助6061-T6铝、EPTI钢两种材料的实验结果，说明了确
定新的声应力系数的方法与步骤. 所得结论是：只要确定了平面应力条件下超声纵波
速度相对变化与主应力和之比，便可确定新的声应力系数.
|
| 关 键 词： | 声应力系数 超声焦散线 超声纵波 应力强度因子 |
| 收稿时间： | 2004-03-31 |
| 修稿时间： | 2004-10-27 |
A tentative introduction of some advanced knowledge in the teaching of structural mechanics |
| |
| QI Kai,CHEN Shen,CHEN Zhenju.A tentative introduction of some advanced knowledge in the teaching of structural mechanics[J].Mechanics and Engineering,2005,27(4):0-0. |
| |
| Authors: | QI Kai CHEN Shen CHEN Zhenju |
| |
| Abstract: | The similarity formulae of model testing in advancing
shield tunnels are proposed based on the Goodierian theory. Many practical
factors such as the advancing pressure and speed, the soil pressure, the
soil discharging and losing ratio, and the infused mud quantities are
included in them. The
viscosity-elasticity-plasticity property as well as the large deformation of
the soft soil are considered in the discussion. The formulae can be used to design the |
| |
| Keywords: | advancing shield tunnels model testing similarityformulae |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
| 点击此处可从《力学与实践》浏览原始摘要信息 |
|
