Research on the Construction of Natural, Ecological and Environment-friendly Earth-wooden Folk Dwellings

By applying modern and traditional techniques of constructing tulou (or literally translated as earthen structures, and also known as "hakka tulou", "earth dwelling", and "round stronghold"), building environment and traditional ecological views of tulou were taken as the basis to explore the construction of modern folk dwellings. Work in all areas is promoted by drawing upon the experience gained on key points. Highlight of the design is to use raw soil and pollution-free raw materials, explore the construction of ecological folk dwellings in the new countryside, seek for the breakthrough of traditional architectural designs on the application of raw soil, and find out a practical platform for the construction of natural, ecological and environment-friendly buildings.

隐伏岩溶条件下的上部结构-基础-地基共同作用数值模拟分析

基于龙岗区某超高层大夏,建立岩溶地基-基础-上部结构共同作用的有限元计算模型,模拟分析溶洞的应力、应变、位移及桩基础受力性能,并将分析结果与传统设计方法(上部结构与地基基础分离成两部分计算)进行对比分析,指出岩溶地基条件下传统设计方法的局限性。其研究结果表明:对于岩溶地基而言,共同作用对柱产生的次应力较小,但个别角柱次应力较大;剪力墙的次应力较大,且其布置方式对共同作用有较大影响,此应力随楼层的增加衰减很快;针对岩溶地基,筏板基础是比较适合的基础形式,在共同作用中起很大作用。

基于CFD的自冷高速电主轴风扇叶片性能研究

以叶片安装型式和叶片型线为设计因素对6种高速电主轴自冷风扇叶片进行了CFD模拟,得到了风扇内部的流场情况。研究发现,冷却风量和全压随转速的增大而增加,风扇效率随转速的变化基本保持不变;轴功率主要受叶片安装方式的影响,叶片型线的影响不大;弧线径向式叶片和弧线前向式叶片的冷却风量和效率最高,但弧线前向式叶片需要消耗更多的轴功率;风扇内部气流受电主轴端面和风罩的阻碍,容易在叶片根部和风罩处产生漩涡,造成流动损失。