考虑岩体边坡滑动大变形破坏特性和现有研究分析手段,提出利用第一作者团队开发研制的Geo SM A-3D,在现场岩体结构信息采集的基础上,建立岩体边坡空间数值模型,实体表征岩体三维模型;利用现代数值流形法(NMM)模拟岩体大变形破坏分析手段...考虑岩体边坡滑动大变形破坏特性和现有研究分析手段,提出利用第一作者团队开发研制的Geo SM A-3D,在现场岩体结构信息采集的基础上,建立岩体边坡空间数值模型,实体表征岩体三维模型;利用现代数值流形法(NMM)模拟岩体大变形破坏分析手段,在块体理论的基础上,运用有限元分析中经常用到的重度增加法,不断增加岩体的重度,直到岩体边坡中的"关键块体"产生滑动,使边坡发生大变形破坏;同时以最危险"关键块体"水平位移随重度增加发生突变为破坏依据,对边坡的安全系数进行评定.实例分析某边坡工程的破坏过程,实现了岩体边坡大变形数字表征,为边坡支护提出解决方案,为工程施工和边坡灾害的处置提供参考和借鉴.展开更多
In order to describe and control the stress distribution and total deformation of bladed disk assemblies used in the aeroengine, a highly efficient and precise method of probabilistic analysis which is called extremum...In order to describe and control the stress distribution and total deformation of bladed disk assemblies used in the aeroengine, a highly efficient and precise method of probabilistic analysis which is called extremum response surface method(ERSM) is produced based on the previous deterministic analysis results with the finite element model(FEM). In this work, many key nonlinear factors, such as the dynamic feature of the temperature load, the centrifugal force and the boundary conditions, are taken into consideration for the model. The changing patterns with time of bladed disk assemblies about stress distribution and total deformation are obtained during the deterministic analysis, and at the same time, the largest deformation and stress nodes of bladed disk assemblies are found and taken as input target of probabilistic analysis in a scientific and reasonable way. Not only their reliability, historical sample, extreme response surface(ERS) and the cumulative probability distribution function but also their sensitivity and effect probability are obtained. Main factors affecting stress distribution and total deformation of bladed disk assemblies are investigated through the sensitivity analysis of the model. Finally, compared with the response surface method(RSM) and the Monte Carlo simulation(MCS), the results show that this new approach is effective.展开更多
文摘考虑岩体边坡滑动大变形破坏特性和现有研究分析手段,提出利用第一作者团队开发研制的Geo SM A-3D,在现场岩体结构信息采集的基础上,建立岩体边坡空间数值模型,实体表征岩体三维模型;利用现代数值流形法(NMM)模拟岩体大变形破坏分析手段,在块体理论的基础上,运用有限元分析中经常用到的重度增加法,不断增加岩体的重度,直到岩体边坡中的"关键块体"产生滑动,使边坡发生大变形破坏;同时以最危险"关键块体"水平位移随重度增加发生突变为破坏依据,对边坡的安全系数进行评定.实例分析某边坡工程的破坏过程,实现了岩体边坡大变形数字表征,为边坡支护提出解决方案,为工程施工和边坡灾害的处置提供参考和借鉴.
基金Projects(51375032,51175017,51245027)supported by the National Natural Science Foundation of China
文摘In order to describe and control the stress distribution and total deformation of bladed disk assemblies used in the aeroengine, a highly efficient and precise method of probabilistic analysis which is called extremum response surface method(ERSM) is produced based on the previous deterministic analysis results with the finite element model(FEM). In this work, many key nonlinear factors, such as the dynamic feature of the temperature load, the centrifugal force and the boundary conditions, are taken into consideration for the model. The changing patterns with time of bladed disk assemblies about stress distribution and total deformation are obtained during the deterministic analysis, and at the same time, the largest deformation and stress nodes of bladed disk assemblies are found and taken as input target of probabilistic analysis in a scientific and reasonable way. Not only their reliability, historical sample, extreme response surface(ERS) and the cumulative probability distribution function but also their sensitivity and effect probability are obtained. Main factors affecting stress distribution and total deformation of bladed disk assemblies are investigated through the sensitivity analysis of the model. Finally, compared with the response surface method(RSM) and the Monte Carlo simulation(MCS), the results show that this new approach is effective.
