弯扭

The model is set up in view of the optimum design of midship section of container ships with crankle strength and frequency constraints according to CCS rules and thin-walled beam theory .

结合CCS规范和薄壁杆件理论，建立了考虑弯扭强度和频率约束的集装箱船中剖面优化设计的模型，考虑到中剖面优化设计中的设计变量为连续和离散的混合变量，利用isight中集成的自适应模拟退火算法，建立了巴拿马型集装箱船中剖面优化设计系统，并对3100TEU集装箱船中剖面进行了优化设计，取得了合理的结果。

It provided a correct and reasonable mathematical model for the analysis of the ultimate bearing capacity and crankle stability of the thin-walled structure.

论文在比较了两种运动描述方法（完全拉格朗日法和更新拉格朗日法）异同点并分析了非线性几何关系及大变形下的弹性物理关系的基础上，基于增量虚功原理推导了几何非线性空间梁元单元切线刚度矩阵，采取分模块形式，分别表示了轴力、弯矩、双力矩对几何矩阵的贡献；通过球面显式荷载增量迭代式弧长法求解方法编制程序，很好地实现了几何非线性增量荷载的自动步长选择及全过程跟踪，为薄壁杆系结构的极限承载力分析和弯扭失稳分析，提供了较为精确合理的分析力学模型。

Since it is very difficult to established the model via ANSYS software, UG software is used to set up the model. In the fourth chapter, the bus body"sstructure are analyzed by ANSYS software. Three work situations of bus body are discussed, which are bend work situation, torsion work situation and crankle work situation. The stiffness and strength of bus body"s structure are calculated to guide the design of bus bodys structure.

由于使用ANSYS软件建模很不方便，本文使用UG软件建模，利用UG软件的图形数据转换接口，将作好的模型导入ANSYS中处理；第四章主要是介绍了如何使用ANSYS软件进行客车车身结构的分析，文中讨论了客车的三种使用工况，弯曲工况、扭转工况和弯扭工况，计算了客车车身的结构强度和刚度用于指导客车车身结构的设计。

Aiming at the mathematic model of shafting crankle coupling vibration based on the subsection continuous mass model,the multidimensional frequeney analysis method is put forward and developed.Combining frequency change with shafting configuration parameter,it's more favorable to have direct analysis.The method...

针对基于分段连续质量模型的轴系弯扭耦合振动数学模型，进一步简化并提出多维频率分析方法，将频率变化与轴系的结构参数联系起来，有利于直观分析，同时给出分析振型、共振频率及共振模态等的方法

Be based on more accurate wedge thin wall component is inflectional and academic, the crankle of the wedge bridge that linear to bearing change carries curved rules effect is inflectional undertook a large number of analysises, put forward new wedge I-steel computation of curved rules of Liang Lin group is formulary.

基于较精确的楔形薄壁构件屈曲理论，对承受线性变化端弯矩功能的楔形梁的弯扭屈曲进行了大量分析，并提出了新的楔形工字钢梁临界弯矩计算公式。

The origin、 development and present state of the container ship2. The deformation characters and collapse mode of the container ship3. The basic theory of thin-walled structural mechanics: The bending of the thin-walled beam; The unconstrained torsion of the thin-walled member bar; The constrained torsion of the thin-walled member bar with opening; The constrained of the thin-walled member bar with closed port.4. The calculation of the warp stress in the container ship based on the thin-walled structural mechanics theoryModeling of the hull ladder calculation based on referred mechanics theories of thin-walled member bar, calculation of crankle character of the each section, such as sectional coordinates、 Free twist shear flow、 secondary shear flow、 bend shear flow and so on.

本文主要包括下述六个方面的内容： 1 集装箱船的起源、发展和现状 2 集装箱船变形特征和破坏形式 3 薄壁结构力学的基本理论◇薄壁梁的弯曲；◇薄壁杆件的自由扭转；◇开口薄壁杆件的约束扭转；◇闭口薄壁杆件的约束扭转 4 利用薄壁结构力学理论计算集装箱船的翘曲应力建立船体阶梯计算模型，利用薄壁杆件力学中相关理论，求解各断面单元的弯扭特性，包括：扇性坐标、自由扭转剪流、二次剪流、弯曲剪流等。

According to three different theoretical viewpoints related to limited value of flakiness ratio of T-steel web plate analysis is made,which effectively resolve the torsional-flexural buckling problem in compression rod design with single axle symmetry section and simplify design work.

着重介绍了剖分T型钢这种新型材料的研究现状，并对比关于T型钢腹板宽厚比限值的三种不同的理论观点，对三种观点进行了分析，使单轴对称截面压杆设计中比较复杂的弯扭屈曲问题得到有效的处理，从而使设计工作得以简化。

The results showed that the failure mode of roof truss is flexual-torsional buckling of top chord members, which accords with the phenomena observed during test, the ultimate load-bearing capacity is also very close to test data.

结果表明，屋架结构的破坏模式为上弦杆的整体弯扭屈曲，与试验观测到的现象一致，极限承载力和试验结果非常接近。

With the FEA software ANSYS and shell element which has high-precision, this dissertation optimize the size and thickness of skeleton section and seek steel pipe which still have strength and stiffness surplus under static state working condition: sinkage of 240mm of rear wheel. Its fully loaded in the state of static bending and torsion. After that, amelioration is achieved for even strength design.

本课题运用ANSYS有限元分析软件，并且使用精度较高的SHELL壳单元作为建模单元，在静态条件下，通过对左右后轮下沉240mm的弯扭联合工况的模拟分析，寻找出骨架中存在强度和刚度富裕的构件，使之达到轻量化改进的目的。

In this paper, the process of a test on a specimen of long span floor beams system and the test methods are introduced to research the process of moment redistribution between the spandrel beam and floor beam.

通过介绍一榀 8m× 6m大跨度次梁楼盖试验构件的有关试验方法及试验情况，探讨大跨度次梁楼盖中边梁与楼面梁之间弯扭分配的变化过程，并将试验实测结果与弹性理论分析值进行比较，给出此类结构中有关构件的参考设计方法。

Chrysanthemum of 10 thousand birthday is lax to edaphic requirement, with the arenaceous qualitative loam with fecund, good drainage had better.

万寿菊对土壤要求不严，以肥沃。排水良好的砂质壤土为好。

He unstepped the mast and furled the sail and tied it.

他拔下桅杆，把帆卷起，系住。