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 flexural center 弯曲中心(8)挠曲中心(0)
 弯曲中心
 Application of Boundary Element Method to Calculation of Flexural Center of Circular Cylinder with Hyperbolic Notch 用边界元法计算双曲线缺口圆柱的弯曲中心 短句来源 Railway bridge girders on curve would suffer restrained torsion due to the fact that the line of action of live laod and its reaction do not pass through the flexural center of the cross-section of the girder. 曲线上的铁路桥梁,由于活载及其引起的反力不通过梁体横截面的弯曲中心而产生约束扭转。 短句来源 The flexural center of sections with complex curved boundaries like those of bladeprofiles is calculated by obtaining solutions for stress functions and warping functionswith a non-orthogonal coordinate difference method. 对于象叶型这样具有复杂曲线边界的截面,本文介绍用斜交坐标差分法数值求解应力函数和翘曲函数来计算弯曲中心. 短句来源 DETERMINATION OF THE FLEXURAL CENTER OF BLADE PROFILES BY NON-ORTHOGONAL COORDINATE DIFFERENCE METHOD 用斜交坐标差分法计算叶型的弯曲中心 短句来源 Using Saint-Venant bending theory, the lateral bending of a cylinder with a general crosssection is reduced to solving two similar boundary integral equations, from which the flexural function and additional torsion function of the cylinder are obtained. Based on the obtained results, the flexural center of the general cross-section can be determined by use of the boundary element method. Finally, as an application of the method, a numerical example is given in this paper. 使用Saint－Venant弯曲理论，将一般截面柱体的横向弯曲问题，归结为解两个同类型的边界积分方程，并用此求得了柱体的弯曲函数和附加扭转函数．在此基础上，可用边界元法确定一般截面的弯曲中心最后为了说明方法的应用，给出了一个数值算例． 短句来源 更多
 相似匹配句对
 TORSIONAL RIGIDITY AND FLEXURAL CENTER FOR SEMI ELLIPTIC SECTION 半椭圆的扭转刚度和弯曲中心 短句来源 On the education center 教育中心简论 短句来源 HaiShangShanArt Center 海上山艺术中心 短句来源 DETERMINATION OF THE FLEXURAL CENTER OF BLADE PROFILES BY NON-ORTHOGONAL COORDINATE DIFFERENCE METHOD 用斜交坐标差分法计算叶型的弯曲中心 短句来源 Panel's Flexural Vibration 薄板的弯曲振动 短句来源

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 Railway bridge girders on curve would suffer restrained torsion due to the fact that the line of action of live laod and its reaction do not pass through the flexural center of the cross-section of the girder.An analysis of a simply supported prestressed concrete box girder, single cell and 40m span length, on curved track of R=2000m shows that at the bearing end, the torsion stress on longitudinal section, at the toe of the corner rib, is up to 10 kg/cm~2.Such torsional effects have not yet been considered... Railway bridge girders on curve would suffer restrained torsion due to the fact that the line of action of live laod and its reaction do not pass through the flexural center of the cross-section of the girder.An analysis of a simply supported prestressed concrete box girder, single cell and 40m span length, on curved track of R=2000m shows that at the bearing end, the torsion stress on longitudinal section, at the toe of the corner rib, is up to 10 kg/cm~2.Such torsional effects have not yet been considered in design until 1976.This paper presents a derivation of the restrained-torsion influence functions concerning the eccentric vertical live laod and its centrifugal force of a simply supported single cell prestressed concrete box girder on curve.The modified boundary conditions considering no horizontal transverse displacements at the supports are adopted here.As a result of this assumption, the longitudinal external bi moment is induced at the pin bearing accordingly. 曲线上的铁路桥梁,由于活载及其引起的反力不通过梁体横截面的弯曲中心而产生约束扭转。据计算“702”工程中跨度40米的预应力混凝土单室简支箱梁,当桥上线路曲线半径为2,000米时,支座处梗胁根部纵截面上的扭曲应力达10公斤/平方厘米。在1976年以前未考虑扭转力的影响。本文根据“广义坐标法”对于曲线上预应力混凝土单室简支箱梁,导出了偏心竖直荷载及离心惯性力的影响函数。作者在理论计算中对于边界条件采用了比较完善的表达形式,即考虑了支点无横向水平位移。与此相应,固定铰支座截面处有纵向外双力矩作用。 The flexural center of sections with complex curved boundaries like those of bladeprofiles is calculated by obtaining solutions for stress functions and warping functionswith a non-orthogonal coordinate difference method.To determine the flexural center,a number of lattices that approach in shape the givenboundaries should first be chosen and an appropriate non-orthogonal coordinate systemtaken.Then,after difference schemes are derived with the help of loop integrals in themesh region,solutions are... The flexural center of sections with complex curved boundaries like those of bladeprofiles is calculated by obtaining solutions for stress functions and warping functionswith a non-orthogonal coordinate difference method.To determine the flexural center,a number of lattices that approach in shape the givenboundaries should first be chosen and an appropriate non-orthogonal coordinate systemtaken.Then,after difference schemes are derived with the help of loop integrals in themesh region,solutions are found by a direct method for the sets of symmetric bond typelinear algebraic equations obtained and the Romberg's formula is used to numerically inte-grate the functional values of the mesh points.In conclusion,to demonstrate the precisionof the proposed method,some elliptic and semicircular sections are treated and the calcu-lated values satisfactorily approach those of exact solutions. 对于象叶型这样具有复杂曲线边界的截面,本文介绍用斜交坐标差分法数值求解应力函数和翘曲函数来计算弯曲中心.首先选取能逼近边界的网格并建立斜交坐标系,然后对网格区域用回路积分导出差分格式,再用直接法求解所得的对称带状线性代数方程组,并对网格点上的函数值用Romberg 公式数值积分,从而得到弯曲中心值.文末以椭圆和半圆为例考察计算精确度,所得计算值与精确值非常接近. his paper presents an analytical solution for torsional rigidity of semi-elliptic section and a solution for its flexural center. 通过保角映射和解析开拓的方法，获得了半椭圆扭转刚度的分析解。利用半截面弯曲中心的计算公式，给出了半椭圆弯曲中心的解。 << 更多相关文摘
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