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通过对现有供热管网水力仿真计算模型的分析,开发了一个图形化的枝状管网和水力仿真计算软件,建立起枝状管网数学模型,完成了图形化供热管网水力计算图形的识别工作,导出管网流量分配的矩阵方程式,确定了求解数学模型的算法,大大减少了计算的工作量,提高了计算精度。 相似文献
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论述了桥梁壅水计算的发展过程,分析了壅水计算的适用条件,通过实例分析了不同计算方法的精度,指出数值计算在解决工程水力学问题中具有很大的发展潜力。 相似文献
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对于惯性矩连续变化梁的变形计算,给出了一种简便近似的计算方法,以使变惯性矩梁变形计算转化为等惯性矩梁变形计算,从而可以避免积分,直接查表计算,适用范围较广。 相似文献
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运用有限单元法对钢筋混凝土构件进行了计算,给出了无内热源平面不稳定温度场的简化计算方法,并应用结构分析软件ANSYS进行了验证计算,结果表明,该方法满足精度要求,可用于钢筋混凝土结构温度场的计算。 相似文献
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本文提出了用内力影响函数积分法来计算复杂荷载作用下结构的内力,它避免了直接计算复杂荷载下的结构内力,而是将复杂荷载作用下的结构内力计算,转化为单位集中荷载这样一种最简单荷载作用下的结构内力计算,从而大大减化了计算。 相似文献
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全面地分析了桩基的变形过程,提出解决桩基瞬间变形的计算方法,结合规范计算桩基变形的方法,顺利解决了设备基础桩基的计算问题,并计算实例供同行们参议。 相似文献
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浅谈工程结构优化设计 总被引:1,自引:0,他引:1
对结构优化设计进行了介绍,从设计变量的选择、目标函数的建立和约束条件的形成三个方面探讨了结构优化的数学模型,详细阐述了工程结构设计的优化方法,结合工程实际进行优化设计并提出了建议,以促进结构优化设计的发展。 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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从探讨优化设计方法出发 ,建立了合理的桩筏基础优化设计模型。而后通过优化算例分析 ,获得了桩筏基础设计的一些有借鉴意义的优化结论 ,并希望籍此指导桩筏基础的设计 ,挖掘桩筏基础设计的潜力 相似文献
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通过分析纵断面优化问题的难点,提出利用遗传算法优化纵断面的思路,并对满足高程约束的遗传算法设计和工程费用寻优的遗传计算进行了详细讨论,优化结果表明,遗传算法非常适合纵断面优化设计,它可提高设计质量,减轻设计人员的工作强度,具有一定的实用价值。 相似文献
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钢筋混凝土矩形梁的优化设计方法 总被引:1,自引:0,他引:1
介绍了钢筋混凝土矩形梁优化设计方法的相关理论,探讨了优化设计在钢筋混凝土矩形梁设计过程中的可行性,以某钢筋混凝土矩形简支梁为例简述了其优化方法,所得结果相比采用传统设计方法结果能较大降低结构成本,从而阐明了优化方法在工程结构设计中应用的重要性。 相似文献
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通过对多重调谐质量阻尼器(MTMD)控制结构扭转振动的分析,提出了MTMD系统的优化设计步骤,给出了MTMD模型的选取、质量比和MTMD系统TMD总数取值的建议,并通过优化分析,得出了MTMD的最优安放位置和最优设计参数。 相似文献
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Sadaji Ohkubo Kazuhiro Taniwaki Nagahiro Yamano 《Computer-Aided Civil and Infrastructure Engineering》1992,7(3):201-221
Abstract: A general-purpose, rigorous and efficient optimum design system for steel cable-stayed bridges is developed, in which not only can the cable anchor positions on the main girder and pylon, and the crosssectional dimensions of the member elements be dealt with as design variables, but also the pseudo-loads applied to the cables. A powerful two-stage optimum design method is proposed to determine the optimum values of design variables for the cost minimization problem under stress constraints. At the first-stage optimization process, the cable arrangement and sizing variables are optimized by using the approximate concept and dual method with mixed direct/inverse design variables. Then the optimum values of pseudoloads, which induce the optimum prestresses into the cables, and the optimum sizing variables are determined so as to minimize the total cost of the bridge further by utilizing the sensitivities with respect to the pseudo-loads and a modified linear programming algorithm. The rigorousness, eficiency and practical usefulness of the proposed optimum design system are demonstrated by giving numerical design examples and the investigations of the optimum solutions at various design conditions. The significances of dealing with cable anchor positions and pseudo-loads as design variables are also emphasized. 相似文献