DNA BIO SOFT COMPUTING AND ITS APPLICATIONS TO INTELLIGENT SYSTEMS

ＩｎｔｒｏｄｕｃｔｉｏｎＩｔｉｓｋｎｏｗｎｔｈａｔＤＮＡｃａｒｒｉｅｓｔｈｅｇｅｎｅｔｉｃｉｎｆｏｒ－ｍａｔｉｏｎｆｏｒｌｉｆｅ．Ｒｅｃｅｎｔｌｙ,ｅｘｔｅｎｓｉｖｅｉｎｔｅｒｅｓｔｓｈａｖｅｂｅｅｎｅｘｐｒｅｓｓｅｄｉｎｐｏｓｓｉｂｌｙｕｓｉｎｇＤＮＡａｓｃｏｍｐｕｔｉｎｇｈａｒｄｗａｒｅ．ＤＮＡｗａｓｆｉｒｓｔｕｓｅｄｆｏｒｃｏｍｐｕｔａｔｉｏｎｂｙＬ．Ｍ．Ａｄｌｅｍａｎｉｎ１９９４［１］．Ｉｎｈｉｓｇｒｏｕｎｄ－ｂｒｅａｋｉｎｇａｒｔｉｃｌｅ,Ａｄｌｅｍａｎｐｕｂｌｉｓｈｅｄｔｈｅｄｅｓｃ…     

高速三体船波浪中运动与增阻CFD计算研究

基于数值波浪水池技术,对波浪中高速三体船运动及增阻进行CFD计算研究。控制方程—RANS方程和连续性方程使用有限体积法离散,非线性自由面采用VOF方法处理;在入口边界模拟柔性造波板运动产生入射波,使用位于波浪水池尾部的人工阻尼区消波。首先对规则波顶浪中单个主船体的运动和增阻进行了计算,并与高速细长体理论计算结果进行了比较;随后进行了三体船运动和增阻计算,分析了侧片体对主船体阻力增加的影响。为高速三体船耐波性研究提供了数值工具。     

半整体式桥台无伸缩缝桥静力分析

为了克服桥梁伸缩缝病害,考虑了桥梁上部结构、下部结构和基地土的共同作用,建立了半整体式桥台无伸缩缝桥的静力计算模型。以一座长100 m PC连续箱梁桥为例,对该桥在重力、车辆和季节性温度变化荷载作用下进行了弹性大变形分析,对相应的有伸缩缝桥和整体式桥台无伸缩缝桥分析结果进行了对比。结果表明:半整体式桥台无伸缩缝桥主梁的弯矩、剪力、挠度和下部结构的轴力与有伸缩缝桥接近,但主梁中出现了轴力,下部结构弯矩和剪力较有伸缩缝桥大,说明半整体式桥台无伸缩缝桥消除了伸缩缝的病害,结构整体刚度大,是一种有应用推广价值的桥型。     

4 300辆汽车滚装船带浮筒下水动力学计算分析

对可装4 300辆的汽车运输船(PCTC)带浮筒下水过程的动力学采用牛顿第二定律进行计算,对计算方法的选取以及影响计算结果的因素进行分析;计算模块分为下水过程中船舶的状态、运动参数、回转轨迹、全浮时横稳性计算;计算结果与实际下水结果较吻合,计算较准确。     

浅析“浑太胡同”内公路路面高程的水文计算

介绍了"浑太胡同"的概念,并结合鞍山至台安高速公路工程实例,阐述了"浑太胡同"内公路路面高程的水文计算方法。     

An efficient FE computation for predicting welding induced buckling in production of ship panel structure

In a Thermal-Elastic-Plastic (TEP) FE analysis to investigate welding induced buckling of large thin plate welded structure such as ship panel, it will be extremely difficult to converge computation and obtain the results when the material and geometrical non-linear behaviors are both considered. In this study, an efficient FE computation which is an elastic FE analysis based on inherent deformation method, is proposed to predict welding induced buckling with employing large deformation theory, and an application in ship panel production is carried out. The proposed FE computation is implemented with two steps:(1) The typical weld joint (fillet weld) existing in considered ship panel structure is conducted with sequential welding using actual welding condition, and welding angular distortion after completely cooling down is measured. A TEP FE analysis with solid elements model is carried out to predict the welding angular distortion, which is validated by comparing with experimental results. Then, inherent deformations in this examined fillet welded joint are evaluated as a loading for the subsequent elastic FE analysis. Also, the simultaneous welding to assemble this fillet welded joint is numerically considered and its inherent deformations are evaluated.(2) To predict the welding induced buckling in the production of ship panel structure, a shell element model of considered ship panel is then employed for elastic FE analysis, in which inherent deformation evaluated beforehand is applied and large deformation is considered. The computed results obviously show welding induced buckling in the considered ship panel structure after welding. With its instability and difficulty for straightening, welding induced buckling prefers to be avoided whenever it is possible.     

甩挂运输最佳挂车配置数量计算方法

为提高甩挂运输效率,并有效控制车辆购置成本,研究最佳挂车配置数量的计算方法.在阐述研究的背景和意义的基础上以两点一线零担干线甩挂运输为例,剖析运输组织过程,解析运输过程中的时间划分,研究单条甩挂运输线路牵引车数量计算方法,提出最佳挂车数量的约束条件,为模拟现实并简化模型,提出2点假设条件,在此基础上得出挂车配置数量计算方法.结合其他类型甩挂运输特点,对计算方法进行局部修改,解决了客户端甩挂、集装箱甩挂、整车甩挂、三点循环甩挂等各种甩挂运输模式下的最佳挂车数量配置计算方法.     

空心板铰缝计算理论研究

目前,小跨径空心板桥梁中铰缝破坏现象较为严重,极大地影响了桥梁的承载能力和运营安全性。鉴于此,从计算理论出发,借助有限元软件ANSYS对空心板铰缝受力机理进行研究,对传统计算理论提出部分修正,并对计算方法提出了大胆的假定。     

地表倾斜条件下浅埋暗挖隧道的地表沉降规律

采用数值计算的方法,对地表倾斜条件下V级围岩双线铁路隧道浅埋暗挖施工诱发的地表沉降规律进行了研究。研究表明：地表倾斜时的沉降曲线不再具有对称性,地表沉降量最大点的位置随横坡的变陡由拱顶上方逐渐向上坡侧偏移;拱顶埋深相同的条件下,地表倾斜时的最大沉降量比地表水平时的大,并随横坡的变陡近似呈线性增加;地表倾斜时,上坡侧的地表沉降区宽度比地表水平时的大并随横坡的变陡逐渐增大,下坡侧的地表沉降区宽度比地表水平时的小并随横坡的变陡逐渐减少;地表倾斜引起的沉降区宽度变化,上坡侧比下坡侧的大。为隧道施工提供了理论指导。     

船舶轴系校中有限元法研究及软件开发

轴系校中有限元法是一种计算精度较高的方法,本文介绍了有限元法的基本理论,并用Visual C 编写了相应的计算软件,并运用该软件对某船进行了计算,与国外软件计算的相应结果做了比较,可以看到本方法的计算精度较高、结果可靠.