Results 1 to 10 of about 14,917 (99)

考虑内力重分布影响的高层结构减震构件单步优化法

open access: yesJianzhu Gangjiegou Jinzhan, 2022
提出了一个考虑内力重分布影响的高层结构减震构件单步优化法,为高层结构减震构件的优化设计提供了一个单步、高效的方法。首先,考察了内力重分布对单自由度并联体系比虚应变能的影响规律。然后提出了考虑并联关系的目标比虚应变能修正系数用以解决已有的单步优化法没有考虑超静定结构内力重分布的问题,并用算例说明优化结果的合理性。然后,作者用非减震构件的单步优化法去优化减震构件,并结合减震性能曲线提出了考虑内力重分布影响的高层结构的减震构件的单步优化法。最后通过算例对所提出的优化法进行验证 ...
陈荣   +4 more
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基于杆件构形刚度参数均匀化的单层网壳稳定性能优化

open access: yesJianzhu Gangjiegou Jinzhan, 2023
为实现网壳各节点抵抗荷载能力的均匀分布,提升结构稳定承载力,基于网壳结构受力特点,引入了单层网壳结构的杆件构形刚度参数。以结构杆件构形刚度均匀化为目标,将网壳杆件截面尺寸作为优化变量,采用惯性权重改进后的粒子群算法对网壳的杆件截面进行优化配置。优化结果表明,构形刚度方差能较为准确地反映结构的杆件构形刚度均匀程度。通过粒子群算法优化后求得的杆件配置可以使网壳结构接近于等稳定性,最大程度地提升结构的稳定极限承载力。
张澜, 孙建恒, 史若琪, 王军林
doaj  

40.5 kV高海拔穿墙式固封极柱电场分析与结构优化

open access: yesGaoya dianqi, 2020
结构小型化和高绝缘水平的优化设计是固封极柱设计中的重要组成部分。以40.5 kV高海拔穿墙式固封极柱为例,通过对普通结构、外绝缘加高结构、伞裙优化与屏蔽优化相结合等不同结构形式的固封极柱的电场进行分析,实现了绝缘结构的最优化。解决了40.5 kV高海拔穿墙式固封极柱的绝缘问题和局部放电问题,为类似40.5 kV穿墙式固封极柱的绝缘结构优化提供了参考。
李红梅, 王志川, 刘玉春
doaj  

基于磁场与电弧互作的真空断路器触头结构设计

open access: yesGaoya dianqi, 2022
针对因真空断路器大电流故障开断过程中灭弧室断口场域磁感应强度弱,导致磁场对电弧等离子体有效控制力减弱的问题,将NSPSO多目标优化方法与磁场有限元分析相结合,以12 kV/1 250 A/31.5 kA典型技术参数的中压真空断路器灭弧室纵磁触头系统为对象进行结构优化设计,以触头片开槽长度、斜槽深度、触头片开槽偏转角、触头杯座厚度为优化设计变量,以灭弧室断口中心截面纵磁最大值与磁场有效作用面积同时达到最大值为优化设计目标,求得Pareto前沿非支配优化解集 ...
臧谦   +6 more
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基于有限元和神经网络方法的电磁斥力机构结构优化设计

open access: yesGaoya dianqi, 2021
针对高压直流断路器的电磁斥力机构,提出了一种优化机构结构参数的方法。首先运用场路耦合方法对电磁斥力机构建立模型,利用有限元方法进行电磁场计算,分析了斥力盘结构参数、线圈结构参数、放电电容电容值和预充电压变化对动态特性的影响。以电流峰值、电磁斥力峰值、2 ms时刻位移值和速度值作为目标函数,利用神经网络算法,拟合了斥力机构结构参数与目标函数之间的关系,从而对斥力机构的结构进行了优化设计。优化结果表明,在不增大2 ms时刻运动速度条件下,初始运动速度和2 ms时刻位移均得到提高,改善了机构的动态性能 ...
孟洲恬, 淡淑恒
doaj  

小型反渗透膜系统优化结构设计

open access: yesGongye shui chuli, 2003
提出了纯水制备反渗透膜系统优化设计的经典模型, 导出了相应的简化模型, 描述了用现行设计软件实现优化设计的具体计算过程, 明确了系统优化结构的两个判据。在此理论与方法指导下, 得出了对应低难溶盐给水条件的膜系统最优"六支段饱和结构", 并结合浓差极化指标严格界定了低难溶盐给水的各难溶盐临界饱和度, 从而为小型反渗透膜系统的设计提供了一套完整的优化理论、优化方法与优化结构。
靖大为, 徐腊梅, 王婷
doaj   +2 more sources

弦支穹顶结构尺寸优化设计的研究

open access: yesJianzhu Gangjiegou Jinzhan, 2012
以结构重量为目标函数,考虑构件稳定应力约束、强度应力约束、长细比约束和结构位移约束,对弦支穹顶结构进行了尺寸优化设计研究。为有效引入位移约束,采用位移关于构件截面积梯度分量权重来增加构件截面积。为提高设计变量的搜索效率,对钢管、钢索和钢拉杆规格库进行了优化排序处理,显著提高了优化搜索速度。采用优化设计方法,对深圳大运会篮球馆屋盖弦支穹顶结构进行了尺寸优化设计研究。研究结果表明,在构件稳定应力、强度应力、长细比和结构刚度(位移约束)等约束满足设计要求前提下,结构用钢量显著减少。优化设计方法搜索速度很快 ...
刘树堂
doaj  

变压器分接开关内酚醛压板的神经网络全局优化设计

open access: yesGaoya dianqi, 2011
为改善变压器分接开关电场环境,笔者重点研究了变压器分接开关内酚醛压板的电场分布,利用有限元法计算了这种绝缘结构的电场,提出了结构设计的神经网络最优化方法。在神经网络最优化方式中,构建酚醛压板绝缘结构参数——电场分布的多输入—多约束输出神经网络模型,利用最优化方法构建优化算法,真正实现了酚醛压板绝缘结构的全局优化设计。结果表明,该方法对于研究多输入—多约束输出模型的全局优化设计具有普遍的指导意义。
蒋战朋, 文远芳, 范小辉
doaj  

基于一维搜索算法的张弦桁架离散变量优化

open access: yesJianzhu Gangjiegou Jinzhan, 2011
本文采用Matlab语言编写张弦桁架结构模型程序,对张弦桁架在各荷载工况下的受力性能进行了分析;首先采用Matlab语言编写了张弦桁架结构各种约束条件程序,同时编写了基于离散变量的张弦桁架优化设计程序,采用基于离散变量的一维搜索优化算法对拟定的张弦桁架计算模型进行了优化,优化结果表明基于离散变量的一维搜索优化算法,由于目标函数和约束函数的单调性质,得到的解显然是最优解,而且优化结果可以直接应用于结构实际设计。最后,在确保编写的离散变量优化程序正确的前提下,对不同矢高的张弦桁架结构进行了离散变量优化设计 ...
刘树堂, 侯贯泽, 王林建
doaj  

固态变压器高压连接处绝缘结构优化设计

open access: yesGaoya dianqi, 2022
为了实现固态变压器绝缘性能的提升,满足其电压等级提升和紧凑型一体化设计的需求,利用遗传算法与电场仿真联合方法优化了固态变压器高压连接处绝缘结构。首先通过建立一体化固态变压器的绝缘结构模型,计算了稳态电场分布状态及局域电场集中位置,发现高频变压器与电力电子模块连接处接地截止点局域最高电场达6.97 kV/mm,高于空气击穿强度。其次设计了圆弧形模块连接绝缘结构将接地截止点埋入固体绝缘介质中,并通过遗传算法与电场仿真联合方法优化了圆弧形结构尺寸参数,使得连接处最高电场转移至固体绝缘介质内部 ...
袁妮, 吴俊丽, 冷兆云
doaj  

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Deprecated: Function utf8_encode() is deprecated in /var/www/openaccess.click/meta_xml.php on line 47

Deprecated: Function utf8_encode() is deprecated in /var/www/openaccess.click/meta_xml.php on line 47

Deprecated: Function utf8_encode() is deprecated in /var/www/openaccess.click/meta_xml.php on line 47

Deprecated: Function utf8_encode() is deprecated in /var/www/openaccess.click/meta_xml.php on line 47

Deprecated: Function utf8_encode() is deprecated in /var/www/openaccess.click/meta_xml.php on line 47

Deprecated: Function utf8_encode() is deprecated in /var/www/openaccess.click/meta_xml.php on line 47

Deprecated: Function utf8_encode() is deprecated in /var/www/openaccess.click/meta_xml.php on line 47

Deprecated: Function utf8_encode() is deprecated in /var/www/openaccess.click/meta_xml.php on line 47

Deprecated: Function utf8_encode() is deprecated in /var/www/openaccess.click/meta_xml.php on line 47

Deprecated: Function utf8_encode() is deprecated in /var/www/openaccess.click/meta_xml.php on line 47

Deprecated: Function utf8_encode() is deprecated in /var/www/openaccess.click/meta_xml.php on line 47

Deprecated: Function utf8_encode() is deprecated in /var/www/openaccess.click/meta_xml.php on line 47

Deprecated: Function utf8_encode() is deprecated in /var/www/openaccess.click/meta_xml.php on line 47

Deprecated: Function utf8_encode() is deprecated in /var/www/openaccess.click/meta_xml.php on line 47

Deprecated: Function utf8_encode() is deprecated in /var/www/openaccess.click/meta_xml.php on line 47

Deprecated: Function utf8_encode() is deprecated in /var/www/openaccess.click/meta_xml.php on line 47

Deprecated: Function utf8_encode() is deprecated in /var/www/openaccess.click/meta_xml.php on line 47

Deprecated: Function utf8_encode() is deprecated in /var/www/openaccess.click/meta_xml.php on line 47

Deprecated: Function utf8_encode() is deprecated in /var/www/openaccess.click/meta_xml.php on line 47

Deprecated: Function utf8_encode() is deprecated in /var/www/openaccess.click/meta_xml.php on line 47

Deprecated: Function utf8_encode() is deprecated in /var/www/openaccess.click/meta_xml.php on line 47

Deprecated: Function utf8_encode() is deprecated in /var/www/openaccess.click/meta_xml.php on line 47

Deprecated: Function utf8_encode() is deprecated in /var/www/openaccess.click/meta_xml.php on line 47

Deprecated: Function utf8_encode() is deprecated in /var/www/openaccess.click/meta_xml.php on line 47

Deprecated: Function utf8_encode() is deprecated in /var/www/openaccess.click/meta_xml.php on line 47

Deprecated: Function utf8_encode() is deprecated in /var/www/openaccess.click/meta_xml.php on line 47

Deprecated: Function utf8_encode() is deprecated in /var/www/openaccess.click/meta_xml.php on line 47

Deprecated: Function utf8_encode() is deprecated in /var/www/openaccess.click/meta_xml.php on line 47

Deprecated: Function utf8_encode() is deprecated in /var/www/openaccess.click/meta_xml.php on line 47

Deprecated: Function utf8_encode() is deprecated in /var/www/openaccess.click/meta_xml.php on line 47

Deprecated: Function utf8_encode() is deprecated in /var/www/openaccess.click/meta_xml.php on line 47

Deprecated: Function utf8_encode() is deprecated in /var/www/openaccess.click/meta_xml.php on line 47

Deprecated: Function utf8_encode() is deprecated in /var/www/openaccess.click/meta_xml.php on line 47

Deprecated: Function utf8_encode() is deprecated in /var/www/openaccess.click/meta_xml.php on line 47

Deprecated: Function utf8_encode() is deprecated in /var/www/openaccess.click/meta_xml.php on line 47

Deprecated: Function utf8_encode() is deprecated in /var/www/openaccess.click/meta_xml.php on line 47

Deprecated: Function utf8_encode() is deprecated in /var/www/openaccess.click/meta_xml.php on line 47

Deprecated: Function utf8_encode() is deprecated in /var/www/openaccess.click/meta_xml.php on line 47

Deprecated: Function utf8_encode() is deprecated in /var/www/openaccess.click/meta_xml.php on line 47

Deprecated: Function utf8_encode() is deprecated in /var/www/openaccess.click/meta_xml.php on line 47

Deprecated: Function utf8_encode() is deprecated in /var/www/openaccess.click/meta_xml.php on line 47

Deprecated: Function utf8_encode() is deprecated in /var/www/openaccess.click/meta_xml.php on line 47

Deprecated: Function utf8_encode() is deprecated in /var/www/openaccess.click/meta_xml.php on line 47

Deprecated: Function utf8_encode() is deprecated in /var/www/openaccess.click/meta_xml.php on line 47

Deprecated: Function utf8_encode() is deprecated in /var/www/openaccess.click/meta_xml.php on line 47

Deprecated: Function utf8_encode() is deprecated in /var/www/openaccess.click/meta_xml.php on line 47

Deprecated: Function utf8_encode() is deprecated in /var/www/openaccess.click/meta_xml.php on line 47

Deprecated: Function utf8_encode() is deprecated in /var/www/openaccess.click/meta_xml.php on line 47

Deprecated: Function utf8_encode() is deprecated in /var/www/openaccess.click/meta_xml.php on line 47

Deprecated: Function utf8_encode() is deprecated in /var/www/openaccess.click/meta_xml.php on line 47

Deprecated: Function utf8_encode() is deprecated in /var/www/openaccess.click/meta_xml.php on line 47

Deprecated: Function utf8_encode() is deprecated in /var/www/openaccess.click/meta_xml.php on line 47

Deprecated: Function utf8_encode() is deprecated in /var/www/openaccess.click/meta_xml.php on line 47

Deprecated: Function utf8_encode() is deprecated in /var/www/openaccess.click/meta_xml.php on line 47

Deprecated: Function utf8_encode() is deprecated in /var/www/openaccess.click/meta_xml.php on line 47

Deprecated: Function utf8_encode() is deprecated in /var/www/openaccess.click/meta_xml.php on line 47

Deprecated: Function utf8_encode() is deprecated in /var/www/openaccess.click/meta_xml.php on line 47

Deprecated: Function utf8_encode() is deprecated in /var/www/openaccess.click/meta_xml.php on line 47

Deprecated: Function utf8_encode() is deprecated in /var/www/openaccess.click/meta_xml.php on line 47

Deprecated: Function utf8_encode() is deprecated in /var/www/openaccess.click/meta_xml.php on line 47

Deprecated: Function utf8_encode() is deprecated in /var/www/openaccess.click/meta_xml.php on line 47

Deprecated: Function utf8_encode() is deprecated in /var/www/openaccess.click/meta_xml.php on line 47

Deprecated: Function utf8_encode() is deprecated in /var/www/openaccess.click/meta_xml.php on line 47

Deprecated: Function utf8_encode() is deprecated in /var/www/openaccess.click/meta_xml.php on line 47

Deprecated: Function utf8_encode() is deprecated in /var/www/openaccess.click/meta_xml.php on line 47

Deprecated: Function utf8_encode() is deprecated in /var/www/openaccess.click/meta_xml.php on line 47

Deprecated: Function utf8_encode() is deprecated in /var/www/openaccess.click/meta_xml.php on line 47

Deprecated: Function utf8_encode() is deprecated in /var/www/openaccess.click/meta_xml.php on line 47

Deprecated: Function utf8_encode() is deprecated in /var/www/openaccess.click/meta_xml.php on line 47

Deprecated: Function utf8_encode() is deprecated in /var/www/openaccess.click/meta_xml.php on line 47

Deprecated: Function utf8_encode() is deprecated in /var/www/openaccess.click/meta_xml.php on line 47

Deprecated: Function utf8_encode() is deprecated in /var/www/openaccess.click/meta_xml.php on line 47

Deprecated: Function utf8_encode() is deprecated in /var/www/openaccess.click/meta_xml.php on line 47

Deprecated: Function utf8_encode() is deprecated in /var/www/openaccess.click/meta_xml.php on line 47

Deprecated: Function utf8_encode() is deprecated in /var/www/openaccess.click/meta_xml.php on line 47

Deprecated: Function utf8_encode() is deprecated in /var/www/openaccess.click/meta_xml.php on line 47

Deprecated: Function utf8_encode() is deprecated in /var/www/openaccess.click/meta_xml.php on line 47