{"title":"利用位移梯度模型和统一最小二乘技术确定应变场","authors":"Lin Yi-chun, Han Jen-Yu","doi":"10.5897/SRE2015.6377","DOIUrl":null,"url":null,"abstract":"Deformation analysis is crucial to applications in geodesy, structural engineering, and geology, of which the main goal is to detect the behaviors of a deformed body. Traditional deformation analyses rely on a limited number of observations and thus give a relatively poor description of the strain field on the entire object. In this study, a method based on the displacement gradient model and unified least-squares adjustment is proposed to improve classical deformation analysis. Corresponding quality assessment and sensitivity analysis are derived accordingly to better assess significant deformation. Furthermore, by applying nearest neighbor searching and a triangulated irregular network, the efficiency of analyzing a vast number of observations is improved. Numerical experiments based on real data suggested that the proposed approach detected behaviors of a deformed body in an effective and efficient way. Consequently, the strain field on an object can be obtained rapidly and accurately using the proposed method and a large point dataset. \n \n Key words: Deformation analysis, strain field, dispersed point data, structural health monitoring.","PeriodicalId":21603,"journal":{"name":"Scientific Research and Essays","volume":"11 1","pages":"80-89"},"PeriodicalIF":0.0000,"publicationDate":"2016-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.5897/SRE2015.6377","citationCount":"0","resultStr":"{\"title\":\"Strain field determination using displacement gradient model and unified least-squares technique\",\"authors\":\"Lin Yi-chun, Han Jen-Yu\",\"doi\":\"10.5897/SRE2015.6377\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Deformation analysis is crucial to applications in geodesy, structural engineering, and geology, of which the main goal is to detect the behaviors of a deformed body. Traditional deformation analyses rely on a limited number of observations and thus give a relatively poor description of the strain field on the entire object. In this study, a method based on the displacement gradient model and unified least-squares adjustment is proposed to improve classical deformation analysis. Corresponding quality assessment and sensitivity analysis are derived accordingly to better assess significant deformation. Furthermore, by applying nearest neighbor searching and a triangulated irregular network, the efficiency of analyzing a vast number of observations is improved. Numerical experiments based on real data suggested that the proposed approach detected behaviors of a deformed body in an effective and efficient way. Consequently, the strain field on an object can be obtained rapidly and accurately using the proposed method and a large point dataset. \\n \\n Key words: Deformation analysis, strain field, dispersed point data, structural health monitoring.\",\"PeriodicalId\":21603,\"journal\":{\"name\":\"Scientific Research and Essays\",\"volume\":\"11 1\",\"pages\":\"80-89\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2016-04-15\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://sci-hub-pdf.com/10.5897/SRE2015.6377\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Scientific Research and Essays\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.5897/SRE2015.6377\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Scientific Research and Essays","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.5897/SRE2015.6377","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Strain field determination using displacement gradient model and unified least-squares technique
Deformation analysis is crucial to applications in geodesy, structural engineering, and geology, of which the main goal is to detect the behaviors of a deformed body. Traditional deformation analyses rely on a limited number of observations and thus give a relatively poor description of the strain field on the entire object. In this study, a method based on the displacement gradient model and unified least-squares adjustment is proposed to improve classical deformation analysis. Corresponding quality assessment and sensitivity analysis are derived accordingly to better assess significant deformation. Furthermore, by applying nearest neighbor searching and a triangulated irregular network, the efficiency of analyzing a vast number of observations is improved. Numerical experiments based on real data suggested that the proposed approach detected behaviors of a deformed body in an effective and efficient way. Consequently, the strain field on an object can be obtained rapidly and accurately using the proposed method and a large point dataset.
Key words: Deformation analysis, strain field, dispersed point data, structural health monitoring.