基于Matlab GUI平台的桥梁桩基承载力计算系统

桥梁桩基承载力计算在整个下部结构计算过程中占有非常重要的地位,结合《公路桥涵地基与基础设计规范》(JTGD63-2007)对摩擦桩计算的规定,利用Matlab强大的数学分析功能进行求解,并利用Matlab的GU(IGraphical User Interface)编制了相应的计算程序,在程序中输入相应钻孔的地质信息、桩基设计尺寸和不同工况下的荷载信息,程序就能得到计算结果;通过一个工程实例计算表明,利用本程序计算得到的桩端承载力结果,满足经济、安全的需要,具有很强的工程应用价值。     

车辆控制系统集成开发系统

本文介绍了一种新型的集成开发系统，该系统将模拟计算、实时硬件仿真和实车试验巧妙地放置在同一台微机内，利用微机软、硬件功能、实现了从模拟到样机全过程的高效开发，采用ＶｉｓｕａｌＢａｓｉｃ语言实现了模块化编程，程序在不同的模拟试验条件下具有可重用性，最后给出了一个车辆防抱死系统模拟试验的实便，验证了该系统的实用性与高效性。     

五连杆悬架的刚体运动学和弹性运动学分析

探讨了基于矢量分析原理进行五连杆悬架的刚体运动学和受力分析的方法,并进一步提出了一种考虑橡胶衬套弹性的悬架弹性运动学迭代计算方法。据此编制了相应的计算机程序,进行了一种轿车五连杆后悬架的刚体运动学和弹性运动学模拟分析,探讨了悬架橡胶衬套的弹性对车辆性能的影响。该方法有效简捷,可方便地应用于五连杆悬架设计分析和参数优化。     

非对称悬索桥主缆线形计算流程及程序开发

探讨非对称悬索桥缆索线形分析的方法.设计程序化流程图,通过MATLAB软件将悬索桥成桥状态和空缆状态主缆线形程序化,并用普立悬索桥作为算例进行程序正确性验证.计算表明,该方法具有使用方便、计算速度快、精度高等优点,可在设计及施工中应用.     

考虑多种随机因素的公路工程网络计划技术

对在编制公路工程进度计划时如何考虑气候等随机因素的影响进行了研究，提出了考虑气候等随机因素影响的公路工程动态网络计划方法。该方法将影响公路工程施工的随机因素归纳为2类，分别运用计算机仿真技术和计划评审技术（PERT）建立了各类随机因素对工作持续时间的影响量的计算模型。基于试算法，分别建立了在已知工作开工时间和工作完工时间的前提条件下，工作持续时间的计算模型。运用这些模型在计算机上进行仿真试验，得到一组工作时间参数的样本值，通过对这组样本值的统计分析，得到在随机因素影响下工作持续时间的变化趋势和平均值、项目工期的变化趋势和平均值等参数值，从而为科学地进行进度管理提供依据。     

装配式T梁荷载横向分布分析

T梁荷载横向分布系数的求解属空间问题,然而一般把空间问题简化为平面问题进行手工求解,会在一定范围内出现误差。本文对手算和空间计算荷载横向分布系数求解值进行了比较,得出了一些结论,可为T梁设计提供参考和借鉴。     

预应力异型曲线箱梁桥的设计与计算方法研究

对城市高架桥和立交桥中经常出现的预应力异型曲线箱梁桥的设计和计算进行了分析和研究,结合实际工程,指出了该类桥梁在设计时应着重注意的问题和采取的构造措施,提出了适合该类桥梁设计计算的方法,提出了符合梁格截面划分原则的计算公式,并结合实际利用FORTRAN语言编制了梁格截面的自动划分和截面特性计算程序,利用该程序可以直接生成符合相关计算软件命令格式的截面参数文件,省去了梁格试分和大量截面特性计算的繁琐过程,使得变宽截面的梁格法计算不再费时费力,实践证明利用该设计计算方法可以效率较高的获得满足工程精度要求的计算结果,对于此类桥梁的计算和设计具有一定的指导意义和工程实用价值。     

重载桥梁在混合车列作用下横向分布系数的计算方法研究

针对重载桥梁结构分析中没有"混合车列"作用下横向分布系数计算软件这一情况,对其计算方法进行了研究,并提出了编程加载法、替换法、大荷载法等3种计算方法。以天津临港工业区内的一座重载桥梁为例进行验证,成功地解决了目前主要桥梁软件无法计算混合车列横向加载的问题。详细分析了3种计算方法的特点,确定了各自的适用范围,为同类工程的计算分析提供了参考。     

A Modular Computer Model for the Design of Vehicle Dynamics Control Systems1

SUMMARY

This paper describes a multiport approach to computer-aided modeling of vehicle dynamics. The modeling approach produces models that are suitable for the interactive design and evaluation of complex control strategies. The vehicle model which can be used for ride and handling analysis, is built from modular components. The components are programmed using the syntax of the computer aided control system design (CACSD) program EASYS. Seven modeling components are used to create a three-dimensional vehicle dvnamics model. The model is flexible enoug-h to simulate any suspension design with revolute joints.

Each component of the model consists of a FORTRAN subroutine and a main calling module called a macro. To simplify the process of model building, the modeling components in the car model are designed to represent physical elements, such as the spring, damper, link or tire. To create a model, the components, which are represented by blocks, are interconnected through points, located on the blocks, called pons. These ports have been designed to simulate the location of the connection points between the physical elements, as observed in real systems. The construction of multibody models within a CACSD program offers the flexibility of simultaneous interactive simulation of the three-dimensional dvnamics and evaluation of the desien of the controls.

Although modeling of multibody systems using FORTRAN components has been pioneered by Chace, Haug and Orlandea; and bond graph modeling of multibody systems has been investigated by Bos, this approach is novel because:-

The model is included in the control system design program (EASYS). This arrangement allows the designer to exploit the advanced control design tools available in the program. Furthermore, this approach significantly reduces the computation time required for running the model after parameters modification.

The model is built from components that are interconnected by ports which represent the actual physical location of the connection points between the elements. The multiport approach simplifies the model building process for multibody systems. This simplification is achieved by reducing the model of a multibody system to a block diagram form.     

FZ-10C型反力式滚筒制动试验台检测系统的应用与研究

根据广东省汽车检测站计算机控制系统技术升级改造的有关技术要求,开发了FZ-10C型反力式滚筒制动试验台制动检测软件,并对该制动系统的数据采集和单片机与上位机之间的通信进行了分析和研究.设计了制动检测程序,通过检测数据分析,表明了系统的可靠性高、实用性强.     

A Modular Computer Model for the Design of Vehicle Dynamics Control Systems1

This paper describes a multiport approach to computer-aided modeling of vehicle dynamics. The modeling approach produces models that are suitable for the interactive design and evaluation of complex control strategies. The vehicle model which can be used for ride and handling analysis, is built from modular components. The components are programmed using the syntax of the computer aided control system design (CACSD) program EASYS. Seven modeling components are used to create a three-dimensional vehicle dvnamics model. The model is flexible enoug-h to simulate any suspension design with revolute joints.

Each component of the model consists of a FORTRAN subroutine and a main calling module called a macro. To simplify the process of model building, the modeling components in the car model are designed to represent physical elements, such as the spring, damper, link or tire. To create a model, the components, which are represented by blocks, are interconnected through points, located on the blocks, called pons. These ports have been designed to simulate the location of the connection points between the physical elements, as observed in real systems. The construction of multibody models within a CACSD program offers the flexibility of simultaneous interactive simulation of the three-dimensional dvnamics and evaluation of the desien of the controls.

Although modeling of multibody systems using FORTRAN components has been pioneered by Chace, Haug and Orlandea; and bond graph modeling of multibody systems has been investigated by Bos, this approach is novel because:-

The model is included in the control system design program (EASYS). This arrangement allows the designer to exploit the advanced control design tools available in the program. Furthermore, this approach significantly reduces the computation time required for running the model after parameters modification.

The model is built from components that are interconnected by ports which represent the actual physical location of the connection points between the elements. The multiport approach simplifies the model building process for multibody systems. This simplification is achieved by reducing the model of a multibody system to a block diagram form.     

多轴车辆——桥梁耦合振动响应的数值解法

针对复杂的车桥耦合振动问题,基于D’Alembert原理导出了3轴5自由度车辆的运动方程,考虑了桥面不平度和车辆与桥梁之间的协调条件,推导了车辆与桥梁的相互作用力,基于模态综合理论建立了3轴移动车辆—桥梁耦合振动的微分方程组,编制分析程序并运用HHT方法进行了数值求解。通过算例和某3跨刚架桥的动载试验研究结果验证了该方法的正确性和有效性。对于复杂的多跨桥梁的振型函数可以通过有限元方法求解然后通过插值函数得到,该方法不仅适用于单跨简支梁,也适用于多跨连续梁桥车桥耦合振动问题的求解,具有过程简单,编程方便,计算速度快,且精度很高,特别适合于工程实际问题的计算。     

汽车动力学性能的计算机仿真

计算机仿真技术是研究汽车动力学性能的重要手段之一。本文提出了一种汽车动力学模型，建立了动力学方程及求解方法，编制了汽车动力学性能计算机仿真程序（ＡＤＰＣＳＰ），并给出了应用实例。     

连续悬索桥受横桥向船撞力的分析

应用平面有限元计算程序代替空间有限元计算程序，解决了连续悬索桥受横船撞力的分析问题，通过对具体算例的分析，得到了有益的启示。     

可控硅程序控制配料装置

应用可控硅控制技术,对物料配料计量生产流程进行程序控制,可以改善处在粉尘较多及计量要求较频繁工作环境下的配料控制工作.针对自动配料计量控制电路的工作原理及其调节方法进行了较详细的叙述,该装置使用在水泥建材生产配料流程及建筑施工物料配料流程中,具有结构简单、系统运行性能可靠、配料计量调整范围大、误差率小等使用效果.     

带悬臂翼缘的整体式钢筋混凝土连续板桥计算模型

综合应用了3种计算方法的原理：(1)内力增大系数法;(2)刚接板荷载横向分布系数法;(3)等代简支梁跨长等,建立了带悬臂翼缘的整体式钢筋混凝土连续板桥计算模型。它可以应用一般平面杆系的电算程序计算,其精度已被空间有限元电算程序的计算结果所验证。因此,本模型对于设计人员来说,具有实用意义。     

大跨径桥梁的静风稳定性计算

提出一种计算大跨径桥梁静风稳定性的方法——非线性有限元法，这种方法基于ANSYS，充分考虑了结构几何非线性及静风荷载非线性的影响。以武汉阳逻长江公路大桥为例进行了分析计算。     

三塔斜拉桥受横桥向风载时的计算方法

应用平面杆系有限元计算程序代替了空间有限元计算程序 ,阐述了对三塔斜拉桥受横向风载时的计算步骤和计算方法 ,具有概念清楚 ,计算简单和易于掌握的优点。     

基于ISO15765协议的车载电控单元应用程序刷新系统设计

针对车载电控单元应用程序更新频次越来越快的要求,设计了一种基于ISO15765协议的应用程序刷新系统。该系统采用上下位机的方式,上位机用作人机界面,下位机用作上位机与车载电控单元之间的通信接口。实际测试表明,该系统能成功刷新符合ISO15765协议的车载电控单元的应用程序。     

正交试验设计在客车外围流场空气动力学特性研究中的应用

影响客车外围流场空气动力学特性的因素较多,各个因素需要研究的水平也较多。应用正交试验设计方法确定模拟计算方案,不但可极大地降低计算分析工作量,还能得到较优方案。