993 resultados para 1995_03161606 TM-7 4500405


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Os constituintes começaram a apresentar os pedidos de Destaques para votação das emendas em separados. O prazo para a entrega dos requerimentos vai até o dia 22.7.1988 a meia-noite. Cada constituinte tem o direito de apresentar 4 (quatro) Destaques. O primeiro a chegar foi o Líder do PMDB, Nelson Jobim. Até o final da tarde mais de 180 constituintes já tinham apresentado seu Destaque, como foi o caso dos deputados Francisco Kuster (PMDB-SC) e Nelson Frederich (PMDB-PR). O Centrão que fez algumas reuniões anteriormente, já sabe o que quer retirar do texto e acredita que têm votos suficientes para isto. Os constituintes considerados progressistas acham que os temas que foram objeto de acordo no 1º Turno devem permanecer no texto e acreditam que pouca coisa deve ser modificada. Jair Menegheli (Presidente da CUT) disse que os sindicalistas já estão preparados para a defesa de seus direitos no 2º Turno.

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Exposição que os Estados Unidos do Brazil apresentam ao Presidente dos Estados Unidos da América como árbitro seguindo as estipulações no Tratado de 7 de setembro de 1889, concluído entre o Brazil e a Republica Argentina.

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We investigated within- and between-reader precision in estimating age for northern offshore spotted dolphins and possible effects on precision from the sex and age-class of specimens. Age was estimated from patterns of growth layer groups i n the dentine and cementum of the dolphins' teeth. Each specimen was aged at least three times by each of two persons. Two data samples were studied. The first comprised 800 of each sex from animals collected during 1973-78. The second included 45 females collected during 1981. There were significant, generally downward trends through time in the estimates from multiple readings of the 1973-78 data. These trends were slight, and age distributions from last readings and mean estimates per specimen appeared to be homogeneous. The largest factor affecting precision in the 1973-78 data set was between-reader variation. In light of the relatively high within-reader precision (trends considered), the consistent between-reader differences suggest a problem of accuracy rather than precision for this series. Within-reader coefficients of variation averaged approximately 7% and 11%. Pooling the data resulted i n an average coefficient of variation near 16%. Within- and between-reader precision were higher for the 1981 sample, and the data homogeneous over both factors. CVs averaged near 5% and 6% for the two readers. These results point to further refinements in reading the 1981 series. Properties of the 1981 sample may be partly responsible for greater precision: by chance there were proportionately fewer older dolphins included, and preparation and selection criteria were probably more stringent. (PDF contains 35 pages.)

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全书以命令行方式通过大量教学实例和工程应用实例,介绍了建立模型、求解和结果后处理的全过程。

目 录

前言

第1篇教学实例篇

第1章简单拉压杆结构

1.1铰接杆在外力作用下的变形

1.2人字形屋架的静力分析

1.3超静定拉压杆的反力计算

1.4平行杆件与刚性梁连接的热应力问题

1.5端部有间隙的杆的热膨胀

第2章梁的弯曲问题

2.1等截面简单超静定梁的平面弯曲分析

2.2工字形截面外伸梁的平面弯曲

2.3矩形截面梁的纵横弯曲分析

2.4悬臂梁的双向弯曲

2.5 圆形截面悬臂杆的弯扭组合变形

2.6悬臂等强度梁的弯曲

2.7弹性地基半无限长梁在端部力和力偶作用下的变形

2.8偏心受压杆的大变形分析

第3章杆系稳定性计算

3.1利用梁单元计算压杆稳定性

3.2利用实体单元计算压杆稳定性

3.3悬臂压杆的过曲屈分析

3.4平面钢架的平面外失稳

第4章实体模型应力分析

4.1 均布荷载作用下深梁的变形和应力

4.2一对集中力作用下的圆环

4.3用实体单元分析变截面杆的拉伸

4.4用二维实体单元分析等截面悬臂梁的平面弯曲

4.5变截面悬臂梁在端部集中力作用下的平面静力分析

4.6纯弯曲悬臂曲梁的二维静力分析

4.7端部集中力作用的悬臂圆环曲梁平面弯曲的三维分析

4.8均匀拉力作用下含圆孔板的孔边应力集中

4.9两端固定的厚壁管道在自重作用下的变形和应力

第5章膜和薄壳问题

5.1含椭圆孔的椭圆薄膜在外部张力作用下的静力分析

5.2圆形薄膜大变形静力分析

5.3柱形容器在内压作用下的静力分析

5.4圆柱形薄壳在均匀内压作用下的静力分析

第6章板的弯曲和壳体计算

6.1简支和固支圆板的在不同荷载作用下的弯曲

6.2悬臂长板的大挠度弯曲

6.3用壳体单元分析受均布荷载作用的固支圆板大挠度弯曲

6.4利用拉伸操作建立膨胀弯管模型

6.5两端简支开口柱壳在自重作用下的静力分析

6.6圆筒在一对横向集中力作用下的变形

6.7两边简支开口柱壳在集中力作用下的大变形曲屈

第7章简单振动系统

7.1单自由度弹簧质量系统的频率计算

7.2悬索自由振动的频率

7.3用弹簧单元连接的圆盘的扭转振动

7.4圆杆连接圆盘的扭转振动

7.5钻杆的扭转自由振动

第8章梁的振动分析

8.1简支梁的自振频率计算

8.2 自由―自由梁的纵向自由振动

8.3有轴向压力作用的简支梁的自由振动

8.4用壳体单元计算悬臂等强度梁的自由振动

8.5矩形截面薄壁悬臂梁的自由振动

第9章膜板和实体振动

9.1 圆形张紧薄膜的自由振动

9.2薄膜二维非轴对称自由振动分析

9.3薄膜三维非轴对称振动分析

9.4悬臂长板的自由振动频率

9.5悬臂宽板的模态分析

9.6固支圆板的自由振动

9.7用实体单元分析圆环的振动

9.8机翼模型的振动分析

第1 0章平面建模分析和三维实体建模

10.1 带三个圆孔的平面支座分析

10.2角支座应力分析

10.3 体斜支座的实体建模

10.4四分之一车轮的实体建模

10.5轴承支座的实体建模

第1 1章最优化设计

11.1概述

11.2最优化问题框架

11.3 ANSYS优化设计流程

11.4变截面悬臂梁的外形形状优化

11.5平面刚架的优化设计

第12章层合板和断裂力学

12.1 四边简支方形层合板在均布外载作用下的变形

12.2均布拉力作用下含裂纹板的应力强度因子计算

第2篇工程应用篇

第13章用APDL实现空间网壳结构参数化建模

13.1 K系列球面网壳结构的特点和建模

13.1.1 K系列球面网壳的特点

13.1.2几何描述

13.1.3杆件连接关系

13.2参数化设计语言APDL介绍

13.2.1参数和表达式

13.2.2 ANSYS 中的基本指令

13.2.3分支和循环

13.3用户界面设计语言UIDL介绍

13.3.1 单行参数输入

13.3.2多行参数输入

13.4网壳建模程序设计

13.4.1模型建立的步骤

13.4.2节点坐标计算

13.4.3单元连接

13.4.4变量说明

13.4.5节点坐标计算公式

13.4.6主框图说明

13.4.7单元连接关系定义

13.4.8源程序

13.5程序使用说明

13.5.1加载程序

13.5.2界面说明

13.5.3注意事项

13.6应用举例

13.6.1基本参数

13.6.2输入数据并生成模型

13.6.3输入单元参数和荷载后开始计算

13.6.4选择结果输出方式

第14章塔式起重机静动力分析

14.1塔式起重机基本概念

14.2塔式起重机拓扑模型

14.3塔机模型受力分析

14.3.1部件受力特征分析

14.3.2截面参数定义

14.3.3自重荷载和配重

14.3.4选用合适的分析模型。

14.3.5 固定塔身底部的4个节点

14.4塔机建模程序设计

14.4.1塔身节点计算和单元连接

14.4.2塔顶建模

14.4.3塔臂建模

14.4.4平衡臂和斜拉索建模

14.5塔机静力分析

14.6塔机模态分析

14.7塔机静动力分析程序

第15章长柱形天然气罐在内压作用下的静力分析

15.1概述

15.2建立模型

15.3利用轴对称壳单元SHELL51计算

15.3.1单元基本性质和约定

15.3.2求解过程

15.3.3源程序

15.3.4计算结果

15.3.5简体部分理论解

15.3.6结果讨论

15.4利用8节点2D实体单元PLANE82单元计算

15.4.1建立模型

15.4.2计算过程

15.4.3计算结果及讨论

15.4.4源程序

15.5用20节点3D实体单元solid95计算1/4模型

15.5.1建立1/4三维模型

15.5.2计算步骤

15.5.3计算结果分析

15.5.4与弹性力学解答的对比

15.5.5计算程序

附录

附录A常用结构单元参考

附录B结构分析命令速查

参考文献

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Referência: Diccionario Bibliographico Portuguez / Innocencio Francisco da Silva, 1862. v. 7, p. 386.