浅谈收费到户的水表改造

住宅建筑的水表设置从一个侧面反映了社会居民的生活质量。结合所在地区(哈尔滨)供水公司进行的收费到户水表改造计划,着重从设计角度分析水表设置的发展过程及实现方法。     

客车空气悬架结构件参数化设计系统研究

将产品级参数化设计方法和实例推理技术运用到客车空气悬架设计中,分析了并构建了空气悬架的产品级参数化模型。在UG平台上,建立了典型客车空气悬架实例库及其参数化模板,通过UG二次开发工具设计界面,在Visual C++环境中结合COM组件与Access 2007数据库技术,开发了客车空气悬架的结构件参数化设计系统。通过实例介绍了参数化设计过程,建立客车空气悬架的参数化模型,结果验证了该参数化设计系统的有效性。     

The visual effects of port redevelopment alternatives

Abstract

In the early 1970s, Seattle Piers 90/91 were declared surplus federal property by the GSA. These obsolescent half‐mile‐long piers and their adjacent uplands were purchased by the Port of Seattle for redevelopment. This urban waterfront site of almost 200 acres presents the Port of Seattle with a number of severe planning problems. While it is the last large deep‐water site on Elliott Bay, it is also in a very sensitive location, since it is overlooked on two sides by vocal residential communities with a history of active intervention in development projects on visual and other environmental grounds.

At Piers 90/91, public concerns over the visual effects of port redevelopment include:

1. nuisance effects of night‐operations lighting on adjacent hillside residences;

2. nighttime obstruction of distant views due to increased foreground illumination;

3. day and night view obstruction by tall structures such as container‐handling cranes;

4. alteration of the character of both day and nighttime views by new port facilities.

As part of a program to study the effects of alternative redevelopment strategies for Piers 90/91, the Port has undertaken a through examination of the visual effects of different uses, their visual appropriateness, and the ways by which adverse visual effects can be mitigated. The results were incorporated into an environmental impact statement which documented compliance with the Seattle Shoreline Master Program and with view protection and glare provisions of the City's S.E.P.A. guidelines.

A systematic Visual Resource Management (VRM) approach was successfully employed on this coastal zone project. Major elements included visibility mapping, key view selection, analysis of existing visual character, simulation of alternatives, assessment of relative visual compatibility, and determination of effective mitigation measures. Community involvement has also been a critical element in this approach to assessing and managing the visual effects of redevelopment in a major urban port.     

基于ANSYS二次开发的海洋立管提吊强度分析

海洋立管形式复杂多样,建立通用的有限元模型比较困难.安装过程中,必须考虑海洋立管提吊的强度.基于ANSYS二次开发语言UIDL和APDL,开发了海洋立管提吊的专用模块.采用UIDL开发界面,应用APDL语言编写命令流,实现了多种复杂形式的立管提吊分析模型建立及强度计算功能,解决了计算过程中刚度矩阵奇异性问题.工程实例计...     

Measuring Public Access to the Shoreline: The Boat-Based Offset Survey Method

As cities redevelop underutilized waterfronts, opportunities exist to promote public access to the shoreline. However, planning for access is hampered by a lack of reliable data on how people utilize a specific shoreline. The boat-based offset transect survey (B-BOTS) method allows researchers to accurately record, map, and analyze shoreline access. This article discusses the use of B-BOTS along the northern part Narragansett Bay, RI. Using B-BOTS, on 52 randomly selected days over a two-season period, researchers developed a geodatabase that included the position of all shoreline users and the activity in which they were engaging. Using this geodatabase, the article demonstrates that the amount and type of shoreline use varied dramatically throughout the study area and varied in ways that would not have been predictable using conventional sources of data. The article also demonstrates that the availability of parking not only influenced the amount of shoreline use, but also the manner in which different user types distributed themselves along the shore. The article discusses the importance of such findings for developing plans for waterfront redevelopment and public access.     

大型零件包装箱专用CAD/CAE系统的开发

在UG本身强大的CAD/CAE功能的基础上,利用UGAPI二次开发接口,针对某厂各种运输大型零件用包装箱(包括框架木箱、铁木箱、简易木箱、简易铁箱、铁箱)的设计、应力分析难题,开发了一个包装箱专用CAD/CAE系统,实现了包装箱设计、应力分析、工艺资料生成的自动化,开发的图文档管理软件能够对包装箱的相关图纸及文档进行有效管理。     

基于ABAQUS二次开发的索单元

基于大型通用有限元分析软件ABAQUS计算平台,利用该软件提供的用户单元子程序UEL接口,以悬链线单元为基础,推导了迭代分析公式,向ABAQUS中添入悬链线单元的刚度矩阵及等效荷载列阵,扩充ABAQUS单元库,使悬链线索单元用于ABAQUS有限元分析,并采用Fortran语言开发了接口程序,研究结果表明,所研制的接口程序开发思路正确,计算精度满足要求。     

筑路工程机械CAD技术浅析

介绍了几种AutoCAD的二次开发方法,着重论述了AutoCAD二次开发工具Objec-tARX对于机械设计中各种设备的参数化图形的自动绘制,并以筑路工程机械零件为例进行ObjectARX二次开发全过程的说明。通过CAD的二次开发可以实现广大的厂商的专业化、柔性化生产。     

滑坡码头原址重建工程设计关键技术

滑坡码头原址重建工程应首先根据滑坡原因分析和土体滑移面判断结果进行码头后方岸坡地基处理;明确工程 设计边界条件,包括通过扫海和水下地形测量反映水深变化情况和障碍物分布状况、合理确定滑坡后土壤指标参数、针对 性的水下探摸和打捞方案;最终确定岸坡地基处理采用碎石桩方案,重建码头排架与原排架错开布置、桩基采用钢管桩方 案。结果表明上述方案切实可行,可为类似工程项目的建设和旧码头改造建设提供参考。     

铁路机车车辆工厂改扩建项目的经济评价

对于铁路运输装备制造工厂改扩建项目，按国家规定需对投资项目进行效益费用分析，从而确定项目建设在经济上的合理性和财务上的可行性。此文简要介绍铁路机车车辆工厂改扩建经济评价的特点、评价方法及评价步骤。