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非圆弧
相关语句
  non-circular
    GAs for soil slope stability analysis with non-circular failure surface
    土质边坡非圆弧滑动面的遗传进化模拟
短句来源
    A NEW GLOBAL OPTIMIZATION ALGORITHM FOR ANALYSIS OF NON-CIRCULAR SLIP SURFACE
    一个新的非圆弧滑动全局最优化算法
短句来源
    A new approach based on the method of slices to analyze the stability of slopes with non-circular slip surface is presented.
    提出了一种新的非圆弧滑动边坡稳定分析算法,该算法直接建立在条分法的基础上。
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  non-circular
A revolving electromagnetic actuation mechanism composed of an electromagnetic stator and an electromagnetic rotor has been developed for boring non-circular holes.
      
The purpose of this study is to make clear the behavior of swirling pipe flows with non-circular section.
      
We have investigated experimentally and numerically the swirling flows in a rectangular channel with aspect ratio of 1.3, which is one of the typical pipe flow with non-circular section.
      
Three dimensional FEM simulation for spinning of non-circular fibers
      
A finite element method is employed for a flow analysis of the melt spinning process of a non-circular fiber, a PET(polyethylene terephthalate) filament.
      
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When analyze the stability of slopes, traditional methods often use suppose that the failure surface is circular or other typical functions. But because of complicated surroundings, these suppose only fit for some special questions. So this paper used GAs to search the non-circular critical failure surface, got a new optimization method for soil slopes, which is a global optimal algorithm with good character and don't depends on the shapes of slopes and the function's type.

在对边坡的稳定性进行分析评价时,传统分析方法引入了滑裂面为圆弧型的假设;也有学者将滑裂面假定为对数螺旋线型等其它函数形式。由于边坡实际情况的千差万别,这些假定只能适合于部分特殊的边坡。为此本文利用遗传进化算法来搜索模拟边坡的非圆弧型最危险滑动面,提出了一种土质边坡稳定性分析的遗传进化调优算法,它是一种全局优化分析方法。有很好的重复性。且不依赖于目标函数的性质和边坡的具体形状。

A new approach based on the method of slices to analyze the stability of slopes with non-circular slip surface is presented. Generally,when a sliding body is discretized to slices,the slices′ nodes represent the slip surface. So the basic approach of this algorithm is to move the nodes randomly and uses a non-numerical method,such as simulated annealing(SA) to induct the current surface to the most potential critical slip surface. There are several merits of this method:it doesn′t need to configure searching...

A new approach based on the method of slices to analyze the stability of slopes with non-circular slip surface is presented. Generally,when a sliding body is discretized to slices,the slices′ nodes represent the slip surface. So the basic approach of this algorithm is to move the nodes randomly and uses a non-numerical method,such as simulated annealing(SA) to induct the current surface to the most potential critical slip surface. There are several merits of this method:it doesn′t need to configure searching domains;it can figure out the shape of slip surfaces naturally even under the geometrically and geologically complicated realistic situation without presuming the surface shape previously and it performs with high efficiency since each time the change focuses on only one node. Several test problems are listed and demonstrate that this algorithm can pick out the global critical surface. It also testifies that the shape of potential failure surface can be circular arc,straight lines,or combination of them. Finally,more effective searching strategies are discussed.

提出了一种新的非圆弧滑动边坡稳定分析算法,该算法直接建立在条分法的基础上。滑坡体被离散成一系列的土条之后,滑动面变成由这些土条的节点来控制。该算法的实质是随机移动这些节点,用非数值的方法如模拟退火法使滑动面的移动向潜在的最危险滑动面移动。该算法不需要设定搜索范围,不需要假定滑面形状,能够自然算出复杂几何特征和材料特性真实边坡下最危险滑动面的形状。同时由于变换过程的局部性,计算效率大为提高。计算结果表明,该算法准确找到了全局最优解,并验证了在某些情况下滑动面为圆弧状或分段直线状,或其组合形式。

Failure of debris flow fan is distinct from the common rock and soil slope failure due to the unique geotechnical features of debris flow sediment.Unfortunately,this type of failure was not comprehensively and systematically studied in the past.In our recent research,according to the unique characters of debris flow fan the Spencert slicing method with varying side force inclination is used to search for the noncircular critical slip surface.This is done using Spreadsheet-automated constrained optimization.The...

Failure of debris flow fan is distinct from the common rock and soil slope failure due to the unique geotechnical features of debris flow sediment.Unfortunately,this type of failure was not comprehensively and systematically studied in the past.In our recent research,according to the unique characters of debris flow fan the Spencert slicing method with varying side force inclination is used to search for the noncircular critical slip surface.This is done using Spreadsheet-automated constrained optimization.The results are then compared with the in-situ slip surface.A practical subroutine is developed to interpret the stability of slope with varying physical parameters along the depth by using Visual Basic Application embedded in Microsoft Excel.The in-situ experiment shows that the water content hardly change 50 cm beneath the slope surface and no obvious tension cracks are observed behind the slope.However in the soil layer where the actual sliding occurred,great alteration of water content under concentrated artificial rainfall happened,which is in consistent with the results of numerical simulation.With the increase in height of the soil layer,the calculated safety factor gradually decreases and an optimized noncircular slip surface with an average height of 2.4 m is obtained satisfying all the constrains and assumptions.It can be inferred that the slope failure of the debris flow fan is attributed to the dynamic seepage force caused by hydraulic gradient;and the slicing method is not suitable for the research of the mechanism of failure of debris flow fan.

泥石流堆积体边坡失稳现象由于其组成物质、形成年代和堆积部位等方面的特点,与其他岩土边坡失稳有不同的表现。根据泥石流堆积体的形态特点与沉积特征,利用条块侧向推力正弦变化的Spencert条分法进行泥石流边坡稳定性的分析,对山地工程减灾分析有意义。利用Spreadsheet自嵌Visual Basic Application编译器编写了描述沿深度变化土体物理参数的稳定性分析程式。程序从确定性分析开始计算边坡稳定性系数,并利用Spreadsheet的约束优化功能寻找可能的圆弧滑动面,在此基础上计算最可能的非圆弧滑面,最后与实际观测滑面稳定性分析进行对比现场试验人工降雨造成超渗产流,实时测得的数据表明,在距表层土体50 cm以下含水量变化很小,边坡并没有产生明显的后缘张裂隙,在集中降雨导致超渗产流的情况下,泥石流堆积体边坡失稳主要是表层50 cm深度以内土体含水量变幅大的土层中发生,而在50 cm以下深度范围内土体基本保持稳定。程序分析表明,随着给定的滑动土层厚度的增加,安全系数逐步降低,只有平均土层深度为2.4 m才有完全满足约束条件的最优非圆弧滑面。研究结果表明,条分法已经不能适用于强降雨...

泥石流堆积体边坡失稳现象由于其组成物质、形成年代和堆积部位等方面的特点,与其他岩土边坡失稳有不同的表现。根据泥石流堆积体的形态特点与沉积特征,利用条块侧向推力正弦变化的Spencert条分法进行泥石流边坡稳定性的分析,对山地工程减灾分析有意义。利用Spreadsheet自嵌Visual Basic Application编译器编写了描述沿深度变化土体物理参数的稳定性分析程式。程序从确定性分析开始计算边坡稳定性系数,并利用Spreadsheet的约束优化功能寻找可能的圆弧滑动面,在此基础上计算最可能的非圆弧滑面,最后与实际观测滑面稳定性分析进行对比现场试验人工降雨造成超渗产流,实时测得的数据表明,在距表层土体50 cm以下含水量变化很小,边坡并没有产生明显的后缘张裂隙,在集中降雨导致超渗产流的情况下,泥石流堆积体边坡失稳主要是表层50 cm深度以内土体含水量变幅大的土层中发生,而在50 cm以下深度范围内土体基本保持稳定。程序分析表明,随着给定的滑动土层厚度的增加,安全系数逐步降低,只有平均土层深度为2.4 m才有完全满足约束条件的最优非圆弧滑面。研究结果表明,条分法已经不能适用于强降雨条件下泥石流堆积体边坡失稳机理的研究。

 
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