1) dead zone unit
死区单元
2) Element birth and death
生死单元
1.
The method of element birth and death was applied to simulate the model of loading welding heat source.
基于ANSYS平台给出了管道对接焊接头残余应力数值模拟的计算流程,选用三维实体单元,考虑了材料物理性能随温度的变化以及外界环境对焊接管道对流和辐射散热的影响,采用生死单元方法的热源加载模式,获得了焊接接头残余应力场的分布规律,并对结果进行了分析和讨论。
3) birth-death element
生死单元
1.
The paper briefly introduces several heat source models in numerical simulation of welding processes,including Gaussian distribution,double-ellipsoid distribution and birth-death element.
文中简要介绍了焊接过程数值模拟热源的各种加载模式:高斯分布函数、双椭球分布函数、生死单元方法。
4) element birth and death
单元生死
1.
The process of multi-pass welding was simulated using a technique of element birth and death.
选用三维实体单元,考虑了材料物理性能随温度和相变的影响,采用内部热生成和振幅曲线的加载方法模拟焊接热源的移动,运用单元生死技术模拟多道焊过程。
2.
Temperature distribution during wheel piling is simulated using the thermal analysis module as well as "element birth and death" and contact features of finite element analysis software ANSYS (Ver 6.
0的热分析模块以及“单元生死”和接触功能,成功地模拟了车轮堆垛过程的温度场,为等温过程温度场的模拟奠定了基础。
3.
The paper actualizes the structural initial load using the element birth and death technology,and contrasts the RC beam strengthened with CFRP on the bottom face with the one strengthened with CFRP on the side faces.
在分析中,利用单元生死技术实现结构的二次受力,并对碳纤维梁底加固和梁侧加固的两种不同情况进行了对比。
5) birth and death of element
单元生死
1.
Based on "birth and death of element" and "APDL language",a series of 3-D finite element models is established with current software,and subsequently the deformations of concrete filling are analyzed in the case of the arch foots altitude difference separately being 0.
利用接触面单元,模拟混凝土与管壁的相互作用,同时利用有限元软件的"单元生死"和"APDL语言编程"建立拱肋灌注混凝土的有限元模型,分析对称灌注及两边灌注高差为0。
2.
The technique of “birth and death of element” was brought in the finite element model of construction simulation, which simplified the analysis process.
在施工仿真分析的有限元建模中,引入了“单元生死技术”,使得分析过程简单快捷;在处理施工荷载时,充分考虑了泵送液态混凝土复杂的力学性质,提出了分配液态混凝土自重荷载的新方法,并通过温度荷载等效模拟混凝土的自膨胀效应及水化热效应对结构内力的影响。
3.
In order to obtain the most superior lightweight locomotive frame structure,based on ESO(evolutionary structural optimization),the ANSYS\'s birth and death of element function redevelopment were applied,the element with relatively low stress or low strain energy density was "killed" by setting a stress threshold,and the topology optimization procedure was established by APDL.
为了获得高速机车构架最优轻量化的结构方案,基于渐进结构优化法(ESO),应用ANSYS单元生死功能的二次开发,设定一应力阀值,将相对低应力或低应变能密度的单元"杀死",通过APDL语言编制拓扑优化程序,对某高速动力车辆转向架构架内部筋板位置进行了拓扑优化仿真,提出了构架梁体内部筋板的最优拓扑位置,并对构架的板厚进行了尺寸优化。
6) birth and death element
单元生死
1.
Based on the "Birth and death element" and "APDL language",a series of 3-D finite element models were established with current software,and subsequently the deformations and stabilities of the filling concrete were analyzed,at the same time the deformations and stabilities were analyzed in the case of arch foot altitude difference separately being 0.
利用接触面单元,模拟混凝土与管壁的相互作用,同时利用有限元软件的"单元生死"和"APDL语言编程"建立拱肋灌注混凝土的有限元模型,分析对称灌注及两边灌注高差为0。
补充资料:揭秘死海:死海有无生物?
死海是位于西南亚的著名大咸湖,湖面低于地中海海面392米,是世界最低洼处,因温度高、蒸发强烈、含盐度高,据称水生植物和鱼类等生物不能生存,故得死海之名。那么死海真的就没有生物存在了吗?美国和以色列的科学家,通过研究终于揭开了这个谜底:但就在这种最咸的水中,仍有几种细菌和一种海藻生存其间。原来,死海中有一种叫做“盒状嗜盐细菌”的微生物,具备防止盐侵害的独特蛋白质。
众所周知,通常蛋白质必须置于溶液中,若离开溶液就要沉淀,形成机能失调的沉淀物。因此,高浓度的盐分,可对多数蛋白质产生脱水效应。而“盒状嗜盐细菌”具有的这种蛋白质,在高浓度盐分的情况下,不会脱水,能够继续生存。
嗜盐细菌蛋白又叫铁氧化还原蛋白。美国生物学家梅纳切姆·肖哈姆,和几位以色列学者一起,运用X射线晶体学原理,找出了“盒状嗜盐细菌”的分子结构。这种特殊蛋白呈咖啡杯状,其“柄”上所含带负电的氨基酸结构单元,对一端带正电而另一端带负电的水分子具有特殊的吸引力。所以,能够从盐分很高的死海海水中夺走水分子,使蛋白质依然逗留在溶液里,这样,死海有生物存在就不足为奇了。
参加这项研究的几位科学家认为,揭开死海有生物存在之谜,具有很重要的意义。在未来,类似氨基酸的程序,有朝一日移植给不耐盐的蛋白质后,就可使不耐盐的其他蛋白质,在缺乏淡水的条件下,在海水中也能继续存在,因此这种工艺可望有广阔的前景。
说明:补充资料仅用于学习参考,请勿用于其它任何用途。
参考词条