本数据集为土石坝瞬变电磁场数值计算的数据结果，包括不同坡比、不同水位高度的三维有限元模型计算数据，以及不同位置感应磁场数据。\n
本数据集采用基于有限元计算方法，对理想化的土石坝三维模型开展数值计算。在本计算工作中，有限元建模的依据为实际工程概化的理想化模型，其中对边界进行了无限元域处理，以模型无限空间。\n数据集为XLSX文件，可通过各类excal、wps等软件查看或编辑。\n
在本数据集中包括“土石坝顺便电磁响应计算.XLSX”包括：采样时间（s）、磁感应强度（T）。采用本数据可进一步分析不同坝坡比、不同水头高度时的磁场强度差异，为解释土石坝边界条件对磁场的影响，指导设备开发具有十分重要意义。", "ds_source": "
本数据由有限元软件计算获得。", "ds_process_way": "
选择机理模式为矩形波，激发时长为15ms；激发线圈直径为1m；记录10^-7s~10^-2s的数据。数据可进一步与均匀半空间计算数据进行比较，从而明确土石坝瞬变电磁场的差异。", "ds_quality": "
在瞬变电磁探测领域，考虑土石坝边界条件的响应规律研究少有，导致工程中探测信号解释依据尚不充分，相关的专业探测设备缺少。采用有限元法建立了考虑坡比、覆盖层、上游水位等边界条件的土石坝瞬变电磁探测模型，通过在模型四周设置无限元域来消除边界效应。\n
大坝坡比使得瞬变电磁场传播被“约束”，衰减曲线出现“假高阻”异常；上游水位电导率值高于坝体背景场值时，电磁场扩散出现“畸变”，衰减曲线出现“假低阻”异常；大坝低阻覆盖层使得感应磁场扩散出现“低阻滞留”现象。", "ds_acq_start_time": "2023-01-15 00:00:00", "ds_acq_end_time": "2023-06-30 00:00:00", "ds_acq_place": "江苏省南京市", "ds_acq_lon_east": 110.2, "ds_acq_lat_south": 12.6, "ds_acq_lon_west": 87.3, "ds_acq_lat_north": 29.7, "ds_acq_alt_low": null, "ds_acq_alt_high": null, "ds_share_type": "login-access", "ds_total_size": 754125, "ds_files_count": 4, "ds_format": "*.xlsx", "ds_space_res": null, "ds_time_res": "", "ds_coordinate": "无", "ds_projection": "", "ds_thumbnail": "b41ac90b-10e1-4450-bb7d-9ec6693ded2a.png", "ds_thumb_from": 0, "ds_ref_way": "", "paper_ref_way": "", "ds_ref_instruction": "", "ds_from_station": null, "organization_id": "973f338d-7fd4-4c6f-aab1-44a5c242d419", "ds_serv_man": "李红星", "ds_serv_phone": "0931-4967592", "ds_serv_mail": "ncdc@lzb.ac.cn", "doi_value": "", "subject_codes": [ "410" ], "quality_level": 0, "publish_time": "2025-06-27 15:08:05", "last_updated": "2025-06-28 15:45:00", "protected": false, "protected_to": null, "lang": "zh", "cstr": "11738.11.NCDC.NHRI_DAM.DB6889.2025", "i18n": { "en": { "title": "Transient Electromagnetic Field Calculation Dataset for Earth-Rock Dams", "ds_format": "*.xlsx", "ds_source": "
This data was calculated using finite element software.", "ds_quality": "
In the field of transient electromagnetic detection, there is a lack of research on the response law of boundary conditions of earth and rock dams, resulting in insufficient interpretation basis for detection signals in engineering and a lack of relevant professional detection equipment. A transient electromagnetic detection model for earth rock dams considering boundary conditions such as slope ratio, cover layer, and upstream water level was established using finite element method. The boundary effects were eliminated by setting an infinite element domain around the model.\n
The slope ratio of the dam constrains the propagation of transient electromagnetic fields, resulting in a \"false high resistance\" anomaly in the attenuation curve; When the conductivity value of the upstream water level is higher than the background field value of the dam body, the electromagnetic field diffusion shows \"distortion\" and the attenuation curve shows a \"false low resistance\" anomaly; The low resistance cover layer of the dam causes the phenomenon of \"low resistance retention\" in the diffusion of induced magnetic fields.", "ds_ref_way": "", "ds_abstract": "
This dataset contains numerical calculations of transient electromagnetic fields in earth rock dams, including three-dimensional finite element model calculation data with different slope ratios and water level heights, as well as induced magnetic field data at different positions.\n
This dataset uses finite element calculation method to perform numerical calculations on an idealized three-dimensional model of earth rock dam. In this computational work, the basis for finite element modeling is an idealized model of practical engineering generalization, in which the boundaries are treated with infinite element domain to model infinite space.\nThe dataset is an XLSX file, which can be viewed or edited through various software such as Excel and WPS.\n
This dataset includes \"Calculation of Electromagnetic Response of Earth Rock Dams. XLSX\", which includes sampling time (s) and magnetic induction intensity (T). The use of this data can further analyze the differences in magnetic field strength under different dam slope ratios and water head heights. It is of great significance to explain the influence of boundary conditions on the magnetic field of earth rock dams and guide equipment development.
", "ds_time_res": "", "ds_acq_place": "Nanjing City, Jiangsu Province", "ds_space_res": "", "ds_projection": "", "ds_process_way": "Select the mechanism mode as rectangular wave, with an excitation duration of 15ms; excitation coil diameter of 1m; record data from 10 ^ -7s to 10 ^ -2s. The data can be further compared with uniform half space calculation data to clarify the differences in transient electromagnetic fields of earth rock dams.", "ds_ref_instruction": "" } }, "submit_center_id": "ncdc", "data_level": 0, "license_type": "CC BY 4.0", "doi_reg_from": "reg_local", "cstr_reg_from": "reg_local", "doi_not_reg_reason": null, "cstr_not_reg_reason": null, "is_paper_in_submitting": false, "ds_topic_tags": [ "有限元", "土石坝", "瞬变电磁场" ], "ds_subject_tags": [ "工程与技术科学基础学科" ], "ds_class_tags": [], "ds_locus_tags": [ "南京市" ], "ds_time_tags": [ 2023 ], "ds_contributors": [ { "true_name": "张盛行", "email": "sxzhang@nhri.cn", "work_for": "南京水利科学研究院", "country": "中国" }, { "true_name": "占其兵", "email": "zqb0910@163.com", "work_for": "南京水利科学研究院", "country": "中国" } ], "ds_meta_authors": [ { "true_name": "张盛行", "email": "sxzhang@nhri.cn", "work_for": "南京水利科学研究院", "country": "中国" } ], "ds_managers": [ { "true_name": "汤雷", "email": "ltang@nhri.cn", "work_for": "南京水利科学研究院", "country": "中国" } ], "category": "其他" }