TransCAD在地区客运规划中的应用

结合新疆生产建设兵团客运规划的实际情况，研究了TransCAD在地区客运规划中的运用，详细介绍了在已知基年交通分布和经济指标的情况下，建立交通产生量与经济指标的回归模型，进而预测出交通产生量、交通分布和交通分配。     

Optimization of mooring systems in the context of an integrated design methodology

This work describes an enhanced mooring optimization procedure, oriented towards recent floating production systems (FPS) for oil & gas exploitation in ultra-deep-water scenarios, which may present a large number of risers in an asymmetric layout. Acknowledging that the risers are the key component of an FPS, the optimization procedure is associated to an integrated mooring-riser design methodology; thus, instead of simply minimizing the platform offsets and/or the costs of the mooring system itself, one of the main objectives is to obtain a mooring configuration that ensures the integrity of the risers. Other highlights of the optimization procedure include the following aspects: Enhancements in the modeling of the optimization problem (including the definition of design variables, objective function and constraints that are relevant for such actual applications); The use of the PSO optimization algorithm associated to the ε-constrained method to efficiently handle the constraints; Enhancements in the evaluation of candidate solutions, by full nonlinear time-domain dynamic Finite Element simulations with coupled models; and the implementation in a parallel computing environment to deal with the high associated computational costs. A case study considering an FPS representative of actual applications in deepwater scenarios is presented to illustrate the practical application of the optimization tool.     

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.     

基于产品数据库管理系统的工艺标准化管理

阐述现代大中型制造型企业在产品数据库管理系统下的工艺标准化和现代化管理的方法,以及企业信息化管理模式下如何搞好标准化工作。     

型钢设计自动化研究

以型钢的精细化建模为基础，以HGG（荷兰相贯线设备有限公司）型钢切割机流水线为依托，分析了型钢设计与生产流程重复处理的原因与主要存在的问题及型钢模型与切割机的匹配性，进一步理顺型钢生产设计流程，由专业工序向复合工序转变，实现型钢生产设计的自动化与集成，充分发挥型钢切割机的功能，开发出自动高效的出图方式。     

基于 Tribon M3 平台的电缆贯穿件快速定位方法研究

以Tribon M3为基础,结合电气生产设计电缆贯穿件定位问题进行二次开发,利用空间解析几何中的平面方程,将船体结构抽象为数学模型,以求解方程式的形式得出电缆贯穿件的定位尺寸信息。研究推出了基于数学模型的电缆贯穿件快速、准确定位的有效方法。     

满足PSPC要求的舾装生产设计改进与实现

介绍南通中远川崎船舶工程有限公司在舾装生产设计中对压载舱涂层保护标准的理解和实施,分析舾装生产设计的新工艺和新技术,提出先行舾装、PAD先行等对策,实践证明效果良好.     

高速公路沥青路面施工技术探析

沥青路面是高速公路常用的面层之一,合理的施工质量将有助于确保高速公路长效运行.结合实践经验,详细地总结沥青路面的施工全过程,提出相应环节的施工质量控制要点,以有效地提高沥青路面的施工质量,可供同行参考.     

基于可拓模糊的建筑企业安全生产能力评价

结合目前存在的安全评价方法,以《施工企业安全生产评价标准》(JGJ/T77-2003)为指标准则,将可拓模糊理论引入安全评价问题中,运用关联函数和隶属度精确地划分建筑企业及各评价指标的安全等级情况,描述了基于可拓模糊模型的建筑企业安全生产能力评价的计算过程,案例研究证实模型的有效性.