榆林地区长城墩台模态频率分析及影响因素研究  

The Modal Frequency Analysis of the Towers of the Great Wall in Yulin Prefecture and the Study on the Influential Factors

作　　者：王肃 李宏儒[2] 黄四平[2,3] 汪娟丽[4] 

机构地区：[1]西安唐皇城含光门遗址博物馆,陕西西安710061 [2]西安理工大学,陕西西安710063 [3]咸阳师范学院,陕西咸阳712000 [4]陕西师范大学材料学院,陕西西安710119

出　　处：《文博》2017年第3期94-98,共5页

基　　金：陕西省自然科学基础基金研究计划项目"振动对唐皇城含光门土遗址的影响研究"(项目编号:2014JM2-5062)成果

摘　　要：通过建立有限元模型,对榆林地区典型长城墩台进行模态分析,获得了各阶模态频率,并对影响模态频率的因素进行研究。研究结果表明:模态频率曲线整体呈现波浪形式,总体上还是随着墩台高度的增加先增大后减小。模态频率与墩台破损程度有很大关系,但通过分析得出,墩台高度是影响模态频率的主要因素。为中国古代长城墩台类土遗址的防灾、减灾及防护工作提供应用参考和理论上支撑。Through building finite element models, modal frequency analysis to the typical towers of the section of the Great Wall in the Yulin Prefecture is conducted, the modal frequencies of all of the orders are obtained and the factors influencing the modal frequencies are studied. The results show that the modal frequency curves in whole are in the form of wavy curves, generally increasing first and then decreasing along with the increasing of the heights of the towers. The modal frequencies have very close relationship with the damage degrees of the towers, but the analysis reflected that the heights of the towers are the main factor influencing the modal frequencies. This study provides application references and theoretical supports for the conservation and disaster prevention and reduction of the earthen sites such as the towers of the Great Wall of ancient China.

关 键 词：墩台 模态频率 破损程度 高度 

分 类 号：K878.3[历史地理—考古学及博物馆学]