共查询到19条相似文献,搜索用时 140 毫秒
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依据四连杆机构的求解方法,创建装载机Z形连杆机构的数学模型。在MATLAB软件上,运用SQP算法对徐工LW540F装载机工作机构的非线性数学模型进行优化设计,快速且准确地得到了全局最优解。优化结果改善了工作机构的举升平移性,提高了收斗稳定性,使转斗和举升油缸设计、传动角以及整机协调性满足了设计要求,优化了整机的作业性能,提升了作业效率和经济性能。利用ADAMS软件,对优化后的工作机构进行虚拟样机仿真,仿真结果验证了SQP算法解决装载机工作机构非线性模型优化的可行性。 相似文献
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基于ADAMS的装载机工作装置仿真与优化 总被引:2,自引:0,他引:2
利用ADAMS软件建立了装载机工作装置的虚拟样机模型,对其进行动力学仿真分析,对工作装置进行优化设计,从而获得工作装置综合优化的结果,提高装载机的性能。 相似文献
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在ADVISOR汽车仿真软件的基础上,建立装载机工况循环模型、四轮驱动模型、铲装阻力模型和液压系统功率分流数学模型,二次开发建立了装载机动力性和燃油经济性仿真计算模型。实车试验装载机动力性和燃油经济性,并与仿真计算结果相比,以验证仿真模型的正确性。基于遗传算法,借助装载机动力性和燃油经济性仿真计算模型,对装载机动力传动系统参数进行优化设计。算例计算结果表明,优化方案改善了装载机传动系统参数,其燃油经济性改善较明显。 相似文献
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装载机工作装置优化设计 总被引:4,自引:0,他引:4
对装载机工作装置建立了正确的数学模型,并利用Excel软件实现工作装置的优化设计,结合ZL40装载机工作装置的性能,同时根据不同的工作特性要求,得到了两个优化方案。 相似文献
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采用SolidWorks软件建立装载机工作装置的虚拟样机模型,用COSMOSMotion软件进行仿真分析。分析结果对缩短产品的开发周期,提高设计质量有指导意义。所使用的仿真方法对装载机工作装置设计具有重要的参考价值。 相似文献
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在四杆机构运动分析的基础上,本文阐述了装载机工作装置八杆机构的优化设计。着重讨论了八杆机构优化设计数学模型的建立以及运用优化理论求解该模型问题;编制了相应的优化程序;并通过生产实例验证了本优化设计方法正确性和程序运行的可靠性。 相似文献
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《Geotextiles and Geomembranes》2023,51(1):179-198
The peak shear strength of clayey soil-geomembrane interfaces is a vital parameter for the design of relevant engineering infrastructure. However, due to the large number of influence factors and the complex action mechanism, accurate prediction of the peak shear strength for clayey soil-geomembrane interfaces is always a challenge. In this paper, a machine learning model was established by combining Mind Evolutionary Algorithm (MEA) and the ensemble algorithm of Adaptive Boosting Algorithm (ADA)-Back Propagation Artificial Neural Network (BPANN) to predict the peak shear strength of clayey soil-geomembrane interfaces based on the results of 623 laboratory interface direct shear experiments. By comparing with the conventional machine learning algorithms, including Particle Swarm Optimisation Algorithm (PSO) and Genetic Algorithm (GA) tuned ADA-BPANN, MEA tuned Support Vector Machine (SVM) and Random Forest (RF), the superior performance of MEA tuned ADA-BPANN has been validated, with higher predicting precision, shorter training time, and the avoidance of local optimum and overfitting. By adopting the proposed novel model, sensitivity analysis was carried out, which indicates that normal pressure has the largest influence on the peak shear strength, followed by geomembrane roughness. Furthermore, an analytical equation was proposed to assess the peak shear strength that allows the usage of machine learning skills for the practitioners with limited machine learning knowledge. The present research highlights the potential of the MEA tuned ADA-BPANN model as a useful tool to assist in preciously estimating the peak shear strength of clayey soil-geomembrane interfaces, which can provide benefits for the design of relevant engineering applications. 相似文献
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In this paper, the Genetic Algorithm is applied to calculate the optimum slope and surface azimuth angles for solar collectors to receive maximum solar radiation. An area of Iran is selected to verify the results of this algorithm. The optimum angles and the collector input solar energies for these angles are calculated in hourly, daily, monthly, seasonally and yearly bases respectively. Then, the influence of different combinations of solar radiation components on the optimum slope angle and the energy gain is investigated. The results show that the Genetic Algorithm is a useful technique to find the optimum angles specifically when the number of independent parameters is large. The results show that the daily, monthly and yearly optimum surface azimuth angles for receiving the maximum solar energy are zero. Adjusting the collector at the daily optimum slope angle slightly increases the collector input energy compared with the case of monthly optimum slope angle so that the gain of solar energy is almost the same. The results also show that the hourly optimum surface azimuth angle is not zero and mounting the solar collector at the hourly optimum slope and azimuth angles increases the input energy significantly compared with the case of daily optimum angles. It is shown that the optimum slope angles are mostly dependent on the beam solar radiation. Furthermore, the results indicate that the optimum slope angles of solar collector and Photovoltaic panels are almost the same. 相似文献
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The district heating and cooling (DHC) system of a seawater-source heat pump is large system engineering. The investments and the operational cost of DHC pipe network are higher than a tradition system. Traditional design methods only satisfy the needs of the technology but dissatisfy the needs of the economy, which not only waste a mass of money but also bring problems to the operation, the maintenance and the management. So we build a least-annualized-cost global optimal mathematic model that comprises all constrict conditions. Furthermore, this model considers the variety of heating load and cooling load, the operational adjustment in different periods of the year. Genetic algorithm (GA) is used to obtain the optimal combinations of discrete diameters. Some operators of GA are selected to reduce the calculation time and obtain good calculation accuracy. This optimal method is used to the design of the DHC network of Xinghai Bay commercial district which is a real engineering. The design optimization can avoid the matter of the hydraulic unbalance of the system, enhance the running efficiency and greatly reduce the annualized-cost comparing with the traditional design method. 相似文献
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Bowei Li Kaoshan Dai Huiying Li Bo Li Solomon Tesfamariam 《Structure and Infrastructure Engineering》2019,15(7):954-964
This paper implemented an optimal design of non-conventional multiple tuned mass damper (NC-MTMD) system for coal scuttles in power plant. The NC-MTMD was introduced using base isolation for the coal scuttles. Mathematical models of the NC-MTMD were derived by considering multiple three-dimensional (3D) modes. Base seismic excitation is represented by 3D Kanai-Tajimi filtered white noise. Properties of the base isolation (stiffness, damping) were calibrated through global optimisation using base shear and torsion as the objective function. Derivative (e.g. Global Search, Multi Start), or derivative free (e.g. Pattern Search, Genetic Algorithm and Simulated Annealing) algorithms were considered. Pattern Search algorithm showed better convergence, efficiency and stability performance. A comparative study was performed for single- and multi-mode cases. Robustness of the optimum design was investigated quantitatively. Design parameter variation and mass variation (due to different levels of coal storages) were considered and their influences were studied. 相似文献