1) multi-span tube
多跨管
1.
Computer-aided calculation for the natural frequencies of multi-span tube;
多跨管自振频率的计算机程序
2) multi-span liquid-filled pipe
多跨充液管道
3) multi-span
多跨
1.
Simulation Analysis for Staged Construction of a Multi-span Prestressed Continuous Bridge;
一座多跨预应力混凝土连续梁桥的施工过程分析
2.
Research on the Key Technology in Construction Control of Multi-span Continuous Beam Bridge;
多跨预应力混凝土连续梁桥施工控制关键问题研究
3.
Checking calculation of multi-span monorail beam used in hanging airplane dock
悬挂机坞多跨轨道梁的验算
4) pipe span
管跨
1.
Flow field analysis on subsea pipe span with spoiler;
带阻流板海底管道管跨绕流流场分析
2.
Dealing with the problem of vortex induced vibration (VIV) of submarine pipe span with spoiler and focusing on the asymmetry of its lift coefficient, two new concepts are proposed: lift coefficient amplitude and lift coefficient additional value according to the special structure of spoiler.
管跨结构的涡激振动分析是海底管线疲劳分析和安全评价的重要环节。
5) pipeline span
管跨
1.
Regarding the pipeline span phenomena existed in oil and gas pipelines, this paper proposes a new thought of pipeline span locating based on the elastic wave detection in order to implement an early alert for pipeline span destruction.
针对油气管道中存在的管跨现象,为实现管跨破坏的早期预警,文章提出一种基于弹性波监测管跨的新思路。
2.
In view of the fatigue invalidation of submarine pipeline span caused by vortex-induced vibration, the reliability analysis method of nonlinear vortex-induced vibration invalidation of pipe]the span is proposed.
针对由涡激振动引发的海底管跨疲劳失效,提出管跨非线性涡激振动失效可靠性分析方法,引入波浪和海流对管跨的联合作用以及管跨所受轴力,并考虑管跨海底土壤支撑端的实际工况,建立了管跨段的垂向非线性振动方程及其边界条件,通过模态分析,求得振动方程的固有振型,并以此为基础,推导和建立方程解的关于时间域的微分方程组,运用时频分析方法,由波浪谱推得的波、流力谱作为振动方程的输入谱,计算得到相应的输出谱,进而确定位移和应变等各种响应随机过程的概率分布,结合可靠性理论确定管跨的疲劳失效概率,最后,通过实例的计算与分析,确定几个重要参数对管跨疲劳失效的影响程度。
3.
A method is established of determining fuzzy natural the frequency of submarine pipeline span, based on the fuzzy reasoning principle.
根据管跨端点支撑土壤的变形特性 ,提出了研究管跨振动特性的力学模型 ;探讨了端点支撑的弹性系数和阻尼系数的模糊性 。
6) multi-story and multi-span
多层多跨
1.
In the design of the multi-story and multi-span prestressed concrete frame structures(PCFS),tendons of frame beams usually were designed by crack resistance capacity and it was hard to avoid "strong beam-weak column" and "strong element-weak joint" around inner beam-column joints.
在设计多层多跨预应力混凝土框架结构时,一般按抗裂度控制条件计算预应力筋后再按允许的预应力度确定普通钢筋的数量,则节点抗剪强度不足和“强梁弱柱”难以避免;如果满足梁的截面相对受压区高度的结构位移延性规定,则梁的抗裂度不易满足。
补充资料：多苯基多亚甲基多异氰酸酯
多苯基多亚甲基多异氰酸酯，简称PAPI，或称粗MDI，浅黄色至褐色粘稠液体．有刺激性气味。相对密度(20℃／20 ℃)1．2，燃点218℃。PAPI实际上是由50％MDI与50％官能度大于2以上的多异氰酸酯组成的混合物。升温时能发生自聚作用。溶于氯苯、邻二氯苯、甲苯等。PAPI的活性低，蒸气压低，只是TDI的百分之一，故毒性很低。
用于制造聚氨脂胶粘剂。也可直接加入橡胶胶粘剂中，改善橡胶与尼龙或聚酯线的粘接性能。贮存于阴凉、通风、干燥的库房内，远离火种、热源。严格防水、防潮，避免光照。
用于制造聚氨脂胶粘剂。也可直接加入橡胶胶粘剂中，改善橡胶与尼龙或聚酯线的粘接性能。贮存于阴凉、通风、干燥的库房内，远离火种、热源。严格防水、防潮，避免光照。
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