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Eigenvalue problems in forced harmonic responses analysis in structural dynamics 结构动力学中强迫谐响应分析中的特征值问题
计算力学学报 Pub Date : 2016-08-01 DOI: 10.7511/JSLX201604020
B. Wang
{"title":"Eigenvalue problems in forced harmonic responses analysis in structural dynamics","authors":"B. Wang","doi":"10.7511/JSLX201604020","DOIUrl":"https://doi.org/10.7511/JSLX201604020","url":null,"abstract":"","PeriodicalId":35794,"journal":{"name":"计算力学学报","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2016-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71133786","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Finite element modelling of biogas process from coal 煤制沼气过程的有限元模拟
计算力学学报 Pub Date : 2016-08-01 DOI: 10.7511/JSLX201604033
H. Xing
{"title":"Finite element modelling of biogas process from coal","authors":"H. Xing","doi":"10.7511/JSLX201604033","DOIUrl":"https://doi.org/10.7511/JSLX201604033","url":null,"abstract":"This paper briefly introduced our recent progresses in finite element based geocomputing and then focused on numerical simulation of coupled bioreaction-fluid flow dynamic behaviours during biogenic gas process from coal. The coal bioreactions for methane are described and modelled in the following four main steps: hydrolysis, acidogenesis, acetogenesis and methanogenesis-the formation of methane. The principal constituents are identified in the above reactions: the coal and microorganisms at solid state, the degradable coal, intermediate product, acetate and water (HO) at liquid state, CH and CO at gas state, and the governing equations to describe such coupled bioreaction-fluid flow dynamics are derived based on the mass conservation law. This is solved by finite element method on our PANDAS, and further applied in simulating and analysing the coupled biogenic gas process from coal, which demonstrate the usefulness of proposed algorithm in this paper.","PeriodicalId":35794,"journal":{"name":"计算力学学报","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2016-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71134024","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Stochastic discrete element modelling of rough particles-a random normal interaction law 粗糙粒子的随机离散元建模——随机法向相互作用规律
计算力学学报 Pub Date : 2016-01-01 DOI: 10.7511/JSLX201604032
Y. Feng
{"title":"Stochastic discrete element modelling of rough particles-a random normal interaction law","authors":"Y. Feng","doi":"10.7511/JSLX201604032","DOIUrl":"https://doi.org/10.7511/JSLX201604032","url":null,"abstract":"","PeriodicalId":35794,"journal":{"name":"计算力学学报","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2016-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71133797","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Sequential Reliability-Based Optimization with Support Vector Machines 基于支持向量机的序列可靠性优化
计算力学学报 Pub Date : 2013-01-01 DOI: 10.7511/JSLX201304005
Yijun Wang, Xiongqing Yu, Xiaoping Du
{"title":"Sequential Reliability-Based Optimization with Support Vector Machines","authors":"Yijun Wang, Xiongqing Yu, Xiaoping Du","doi":"10.7511/JSLX201304005","DOIUrl":"https://doi.org/10.7511/JSLX201304005","url":null,"abstract":"Traditional reliability-based design optimization(RBDO)is either computational intensive or not accurate enough.In this work,a new RBDO method based on Support Vector Machines(SVM)is proposed.For reliability analysis,SVM is used to create a surrogate model of the limit-state function at the Most Probable Point(MPP).The uniqueness of the new method is the use of the gradient of the limit-state function at the MPP.This guarantees that the surrogate model not only passes through the MPP but also is tangent to the limit-state function at the MPP.Then Importance Sampling(IS)is used to calculate the probability of failure based on the surrogate model.This treatment significantly improves the accuracy of reliability analysis.For optimization,the Sequential Optimization and Reliability Assessment(SORA)is employed,which decouples deterministic optimization from the SVM reliability analysis.The decoupling makes RBDO more efficient.The two examples show that the new method is more accurate with a moderately increased computational cost.","PeriodicalId":35794,"journal":{"name":"计算力学学报","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2013-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71133774","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Fast Dynamic Mesh Moving Based on Background Grid Morphing 基于背景网格变形的快速动态网格移动
计算力学学报 Pub Date : 2012-01-01 DOI: 10.1007/978-94-007-1839-5_36
Tianjun Lin, Z. Guan
{"title":"Fast Dynamic Mesh Moving Based on Background Grid Morphing","authors":"Tianjun Lin, Z. Guan","doi":"10.1007/978-94-007-1839-5_36","DOIUrl":"https://doi.org/10.1007/978-94-007-1839-5_36","url":null,"abstract":"","PeriodicalId":35794,"journal":{"name":"计算力学学报","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"51478569","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
STATISTICAL DAMAGE DETECTION BASED ON FREQUENCIES OF SENSITIVITY-ENHANCED STRUCTURES 基于灵敏度增强结构频率的统计损伤检测
计算力学学报 Pub Date : 2008-06-01 DOI: 10.1142/S0219455408002636
Z. Wang, F. Au, Y. Cheng
{"title":"STATISTICAL DAMAGE DETECTION BASED ON FREQUENCIES OF SENSITIVITY-ENHANCED STRUCTURES","authors":"Z. Wang, F. Au, Y. Cheng","doi":"10.1142/S0219455408002636","DOIUrl":"https://doi.org/10.1142/S0219455408002636","url":null,"abstract":"A statistical method using frequencies of structures under control is proposed for detecting damage. In the study, feedback control based on independent modal space control is first used to assign the pole of the system under detection intentionally. Then the prescribed characteristic frequencies of the structure under control, which may be more sensitive to damage, are obtained and further employed to constitute a sensitivity-enhanced damage indicator (SEDI). The principle of sensitivity-enhancing feedback control for damage detection of multi-degree-of-freedom systems is elaborated. To overcome the effect of measurement noise on modal frequencies, a hypothesis test involving the t-test that utilizes the SEDI is employed to estimate the occurrence of damage, while a statistical pattern recognition method that uses the feature vectors including the SEDI is employed to locate damage. Based on the perturbation theory, the feature vectors are normalized in order to eliminate the effect of damage extent on damage localization. The proposed method is verified by examples including a three-span continuous beam with a single damaged element and the IASC-ASCE benchmark structure with a single damaged brace. Simulation results show that, by using the frequencies of the structures under control, the proposed damage indicators are more sensitive to damage and are capable of detecting and locating small damage of structures.","PeriodicalId":35794,"journal":{"name":"计算力学学报","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2008-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1142/S0219455408002636","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"64411249","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 10
Fiber Beam Element Model for the Collapse Simulation of Concrete Structures under Fire 火灾下混凝土结构倒塌模拟的纤维梁单元模型
计算力学学报 Pub Date : 2007-01-01 DOI: 10.1007/978-3-540-75999-7_88
S. C. Chen, Xinzheng Lu, A. Ren, J. Jiang
{"title":"Fiber Beam Element Model for the Collapse Simulation of Concrete Structures under Fire","authors":"S. C. Chen, Xinzheng Lu, A. Ren, J. Jiang","doi":"10.1007/978-3-540-75999-7_88","DOIUrl":"https://doi.org/10.1007/978-3-540-75999-7_88","url":null,"abstract":"","PeriodicalId":35794,"journal":{"name":"计算力学学报","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2007-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1007/978-3-540-75999-7_88","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"51063953","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 7
Research of the dynamic behavior of long span suspension bridges under static wind load 静风荷载作用下大跨度悬索桥动力性能研究
计算力学学报 Pub Date : 2001-01-01 DOI: 10.2749/222137801796350158
Ji Li-jun
{"title":"Research of the dynamic behavior of long span suspension bridges under static wind load","authors":"Ji Li-jun","doi":"10.2749/222137801796350158","DOIUrl":"https://doi.org/10.2749/222137801796350158","url":null,"abstract":"The dynamic behavior of long span suspension bridge is the key to the research of its windinduced vibration and seismic response. Since suspension bridge is a type of geometrical non|linear structure,its dynamic behavior is closely related to the inner force state.The static wind load would thoroughly change the inner force state of the structure, and consequently change the dynamic behavior.In this paper we explore the influence on the long span suspension bridge by static wind load and put forward our calculation method of the dynamic behavior of long span suspension bridge under static wind load.","PeriodicalId":35794,"journal":{"name":"计算力学学报","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2001-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69254230","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
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