舰船甲板及平台规范校核软件设计研究

利用VB6.0编制了计算甲板及平台局部强度校核的软件,读取由TRIBON软件中导出的XML数据库中的甲板及平台结构数据信息,自动识别判断板格,并进行校核计算.编制的软件界面操作简单,实用性强,其自动生成的强度校核报告能满足使用的要求,从而有效地减轻了设计人员的工作量,具有很强的实际应用价值.     

公路桥梁施工质量控制程序框图化探讨

把公路桥梁施工质量控制的各方面,从开工前的准备工作到施工质量的把关要点以控制程序框图的形式直观地表示出来,井对其中涉及的重要工作进行了论述。     

大中桥水文计算软件包

阐述了大中桥水文计算软件的组成及理论依据。     

西门子 PLC在电气动系统中的应用

介绍了西门子S7-300系列PLC在电气动系统控制系统中的应用.在该系统中通过LC的程序设计,实现了对各项参数的控制,并对PLC的硬件配置和软件设计作了论述.     

PLC初始状态指令在机械手控制系统中的应用

初始状态指令的功能是自动设置初始状态和特殊辅助继电器.这条指令可以完成很多动作,使控制程序变得非常简单.在机械手的PLC控制系统中采用该指令可以大大提高编程和开发效率.     

考虑碎石基层横观各向同性的沥青路面结构设计

为了分析碎石材料横观各向同性特性对沥青路面结构设计的影响,评价其使用特性,运用状态空间理论,基于横观各向同性层状弹性体系理论解,使用路面结构分析程序ANISOLAY-ER,对基于土基和碎石类材料横观各向同性特性的路面结构设计进行了分析,给出了5种典型沥青路面结构三层体系设计诺谟图,并对一碎石基层沥青路面结构厚度进行了程序化设计。结果表明:在考虑沥青路面关键性设计指标的情况下,对于碎石基层沥青路面结构,沥青层底部拉应变和路表弯沉都普遍比容许值小50%左右,其控制设计指标主要为路基顶部的压应变,车辙为其主要破坏模式。     

有限元计算的可视化系统

为了使有限元计算模型和计算结果真实直观地再现，本文开发了新的有限元计算可视化系统，它不需要对离散结构进行附加的点、线、面、体的数据定义，而只需利用有限元输入的原始数据，即可进行三维有限元模型的消隐和彩色应力显示。本系统快速、方便、实用，现已投入实际使用。     

An analysis of the effects of French vehicle inspection program and grant for scrappage on household vehicle transaction

The French government has implemented a periodical vehicle inspection program, which aims at maintaining proper functioning of the vehicle and ensuring the emissions control systems installed on the vehicle work properly. Also, an incentive program for scrapping old vehicles was introduced in 1994 through 1996 to promote the replacement of those vehicles with higher emissions by newer vehicles with lower emissions. A hazard-based duration model of household vehicle transaction behavior has been developed in this study to examine the effects of the inspection program and the grant for scrappage on vehicle transaction timing. The model is developed as a competing risks model assuming the following three types of competing risks: replacing one of the vehicles in the household fleet, disposing of one vehicle in the fleet, and acquiring one vehicle to add to the fleet. The empirical analysis is carried out using the panel data of French households' vehicle ownership from 1984 to 1998, obtained by the panel survey called Parc-Auto, which has been conducted by a French marketing firm, SOFRES, since 1976. The long panel observation period facilitates the introduction of macro-economic indicators into the model, enabling the analysis to distinguish the effects of policy measures from macro-economic factors. The empirical results indicate that the expected vehicle holding duration becomes 1.3 years longer under the inspection program than before the program commenced, given that the vehicle is replaced by another vehicle at the end of the holding duration; and that the conditional probability of replacing a vehicle aged 10 years and over becomes 1.2 times higher, and the average holding duration becomes shorter by 3.3 years, when the grant for scrappage is available.     

局部桩基础和复合地基上的土石坝三维分析

结合太仓市第二水厂蓄淡避咸水库大坝的地基加固处理工程,针对桩基础和桩长纵向渐变复合地基,应用三维快速拉格朗日法对较大规模群桩进行计算,分析了不同桩径、桩距和桩长复合地基对坝体和坝基的应力、位移的影响。     

Unwedge程序在雪峰山隧道围岩块体稳定性分析中的应用

Unwedge程序是加拿大Toronto大学E．Hoek等依据石根华块体理论开发研制的，对该程序的基本原理作了介绍，并将其应用于雪峰山隧道的块体稳定性分析中。研究表明，该程序具有较好的实际应用价值。