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负荷分配是板厚控制和板形控制的基础,为了保证成品带钢的板形板厚质量,需要在负荷中考虑板形调节能力。综合考虑了单机架轧制各道次轧制压力和板形调节能力,建立了基于粒子群算法的单机架冷轧负荷分配优化数学模型,并利用该算法实现了单机架冷轧机多目标负荷分配优化。采用优化后的轧制规范组织实际生产应用,结果表明该优化模型很好地兼顾了板形控制和板厚控制,达到了良好的应用效果。 相似文献
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在考虑轧机设备能力限制、提高产量和产品质量、减少能耗的基础上,建立了按功率最大化轧制策略的冷连轧机轧制负荷分配优化数学模型,并开发了MATLAB程序.通过仿真实例证明,该算法计算速度快、精度高,克服了传统的负荷分配模型中求解非线性方程组时对初值要求苛刻、计算速度慢的缺点,适用于冷连轧机初始压下分配和轧制规程的离线模拟计... 相似文献
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能耗与力矩模型在轧钢生产中得到了广泛的应用。例如板带连轧机设定系统中负荷分配模型的基本任务就是分配各架轧机上的功率、轧制力和张力。 一、能耗模型的建立 对无展宽的板带轧制,考虑到外摩擦的影响,则轧制变形消耗的功为 相似文献
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提出一种带钢热连轧精轧机组负荷分配的优化计算策略,采用多目标优化算法离线计算确定精轧各机架的轧制力分配系数,采用"压下模式+轧制力模式"相结合的方式实现负荷分配在线计算。为了确定各精轧机架的轧制力分配系数,建立兼顾轧制功率最小、负荷均衡与板形良好的负荷分配多目标优化模型;为了实现负荷分配在线计算,根据压下模式负荷分配计算确定厚度分配的初始值,根据CLAD算法进行轧制力模式负荷分配迭代计算,最后采用压下模式分配计算确定的压下率分布范围对轧制力模式分配结果进行限幅处理。新方法已成功应用于梅钢1 780mm热连轧生产线,在线应用表明该方法可以有效减少操作工干预,提高带钢精轧过程的轧制稳定性。 相似文献
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ZHANG Yan-hua LIU Xiang-hua WANG Guo-dong 《钢铁研究学报(英文版)》2005,12(6):30-32,53
A new method of establishing rolling load distribution model was developed by online intelligent information-processing technology for plate rolling. The model combines knowledge model and mathematical model with using knowledge discovery in database (KDD) and data mining (DM) as the start. The online maintenance and optimization of the load model are realized. The effectiveness of this new method was testified by offline simulation and online application. 相似文献
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Load distribution is a key technology in hot strip rolling process, which directly influences strip product quality. A multi-objective load distribution model, which takes into account the rolling force margin balance, roll wear ratio and strip shape control, is presented. To avoid the selection of weight coefficients encountered in single objective optimization, a multi-objective differential evolutionary algorithm, called MaximinDE, is proposed to solve this model. The experimental results based on practical production data indicate that MaximinDE can obtain a good pareto-optimal solution set, which consists of a series of alternative solutions to load distribution. Decision-makers can select a trade-off solution from the pareto-optimal solution set based on their experience or the importance of objectives. In comparison with the empirical load distribution solution, the trade-off solution can achieve a better performance, which demonstrates the effectiveness of the multi-objective load distribution optimization. Moreover, the conflicting relationship among different objectives can be also found, which is another advantage of multi-objective load distribution optimization. 相似文献
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针对目前MPM限动芯棒机组连轧过程由于轧制负荷和轧辊速度不匹配容易引起的轧机效率低、钢管金属堆积、拉裂、拉凹等问题,采用相对等负荷的设计方法建立数值模拟方案,研究关键的可调参数(辊缝值和轧制速度)对连轧力及金属堆拉的影响。研究结果表明:适当增大受轧制力过大的轧辊辊缝值,可以减少其轧制力,反之,可以增大轧制力,调整产生堆拉现象的对应轧辊的轧制速度,解决金属堆拉的问题。通过现场试验数据验证了有限元模型的正确性。根据优化后获得的参数,建立模型并对轧制力进行了模拟分析比较。 相似文献
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Three-Dimensional Model for Strip Hot Rolling 总被引:3,自引:0,他引:3
ZHANG Guo-min XIAO Hong WANG Chun-hua 《钢铁研究学报(英文版)》2006,13(1):23-26
Steel stripis widely usedin many fields such asautomobile ,building,transportation and householdappliance ,etc·. Withthei mprovement in productiv-ity and automation of strip processing,the require-ments for crown and flatness of strip have been in-creasingly severe ,and“crown free”steel strips arerequired for some special applications such as for au-tomobile parts andtinplate cans .In order toi mprovethe strip quality , an effective three-di mensionalmodel is needful to further study on the… 相似文献