This thesis takes the hunan yueyang dongting lake bridge 、 changsha hongshan bridge and changsha liuyang river bridge as the project background , supported by the national natural science foundation project “ field measurements of rain - wind - induced cable vibration on the yueyang dongting lake bridge in hunan province ” , carries out some researches as follow : 1 . this thesis introduces the development of cable - stayed bridge 、 the necessity to study the cable vibration , briefly introduces the mechanism of cable vibration and cable vibration mitigation measures 本文以湖南岳阳洞庭湖大桥、长沙洪山大桥、长沙浏阳河大桥拉索振动控制为工程背景,在国家自然科学基金项目“斜拉桥拉索风雨振现场观测与半主动控制研究”资助下,进行了以下研究工作: 1 .介绍了斜拉桥的发展,拉索振动研究的必要性并对拉索振动形态及减振措施进行了简要的论述。
I was told by the native hakka in liuyang that most of the hakkaer in liuyang county are progeny of immigrants from the neighboring jiangxi province as a midway initially from guangdong or fujian at the junture of ming and qing dynasty . the total number of hakkaer in liuyang are about 200 , 000 in rough reckoning , distributed around eastern and northen towns of this county 据调查了解，浏阳的客家人大多都是在明末清初迁来的，这是客家人的第四次迁徙的分支之一，大多都是以江西为跳板来到这里的，现在分布在浏阳的客家人有二十多个乡镇大约有二十多万，主要集中在东乡和北乡（在浏阳是按照东西南北来划分的） 。
