摘要：The application of the adaptive growth method is limited because several key techniques during the design process need manual intervention of designers. Key techniques of the method including the ground structure construction and seed selection are studied, so as to make it possible to improve the effectiveness and applicability of the adaptive growth method in stiffener layout design optimization of plates and shells. Three schemes of ground structures, which are comprised by different shell elements and beam elements, are proposed. It is found that the main stiffener layouts resulted from different ground structures are almost the same, but the ground structure comprised by 8-nodes shell elements and both 3-nodes and 2-nodes beam elements can result in clearest stiffener layout, and has good adaptability and low computational cost. An automatic seed selection approach is proposed, which is based on such selection rules that the seeds should be positioned on where the structural strain energy is great for the minimum compliance problem, and satisfy the dispersancy requirement. The adaptive growth method with the suggested key techniques is integrated into an ANSYS-based program, which provides a design tool for the stiffener layout design optimization of plates and shells. Typical design examples, including plate and shell structures to achieve minimum compliance and maximum bulking stability are illustrated. In addition, as a practical mechanical structural design example, the stiffener layout of an inlet structure for a large-scale electrostatic precipitator is also demonstrated. The design results show that the adaptive growth method integrated with the suggested key techniques can effectively and flexibly deal with stiffener layout design problem for plates and shells with complex geometrical shape and loading conditions to achieve various design objectives, thus it provides a new solution method for engineering structural topology design optimization.

摘要：针对燃煤锅炉实际运行工况,建立了锅炉燃烧系统的受控自回归积分滑动平均(CARIMA)模型,并对该模型设计了模糊预测控制器,根据广义预测控制(GPC)的自校正多步预测和反馈校正等特点,将模糊控制作为广义预测控制的校正调节;将锅炉燃烧控制系统划分为燃料量、送风量、炉膛压力3个控制子系统,采用模糊PID控制器对各控制子系统进行了优化。结果表明,优化后的燃料量控制系统在保证控制精度的基础上,使系统响应较平稳,跟踪速度更快;优化后的送风量和炉膛压力控制系统调节时间短,超调量和稳态误差均为0,且具有很强的抗干扰能力。

摘要：为了分析集流环结构对淬火炉内两相流流场的影响,以常压高速氮气和雾化水混合物喷射淬火炉内的复杂流场为研究对象,采用Mixture两相流数值模型,利用CFD数值模拟软件FLUENT对其进行了数值模拟分析。分析了不同集流环角度和尺寸时对淬火炉内的流场的影响。研究结果表明,淬火炉内的流场非常复杂,内腔、外腔及集流环附近存在回流。集流环的角度对出口流速影响较小,而集流环内部直径影响较大。数值模拟结果表明,所设计的淬火炉对淬火介质的流动具有加速作用,可以实现对试件的快速冷却。

摘要：针对直接空冷机组空冷岛规模庞大、难以实现温度和风速大规模测量的问题,设计了一套空冷岛动态参数监测系统。对空冷岛的测点进行优化布置,并详细介绍了硬件系统和软件系统。在空冷岛上安装搭载有温度和风速传感器的实时移动监测装置,并采用传感器技术,对现场数据进行采集和传输。选取IFIX作为上位机监控软件,使用OPC技术来实时监测和管理空冷岛的相关动态参数,使整个监控过程可视化。上述监测系统基本实现对现场数据的采集、处理和监控功能,为直接空冷系统的防冻预警、安全运行和空冷岛空气侧的场分布提供可靠的数据依据,对全面、准确把握直接空冷系统的运行状态、提高电厂的安全经济运行具有重要意义。

摘要：智能制造实训中心改革发展对实践教学提出了新的要求,新的产业群快速发展为人才培养创新模式提出更高标准,具备工程观、系统观和质量观的综合高技能人才成为未来主要需求,本文结合这一需求,首先分析智能制造工程训练中心建设的必要性,其次提出以产业发展为导向、多学科交叉融合强化新工科建设思路,重点阐述了智能制造工程训练中心建设具体实施方案,实现了系统培养工程实践能力、衔接创新创业,强化创新实践、以培训进修为基础,导引工程能力提升等智能制造综合人才培养和实践的新模式,大大地提高了智能制造人才工程实践能力和工程创新能力的培养。