1) Multiple damage
多位置损伤
1.
It was proved that the variation rates are superpositionable,so that the variation rate of the first modal caused by multiple damages is obtained by superposition of all variation rates of the first modal caused by all the damages.
引入了一阶振型变化率的概念,并且证明了一阶振型变化率具有可叠加性,多位置损伤所引起的一阶振型变化率是各单位置损伤引起的一阶振型变化率的线性叠加。
2.
Three damage detection methods for multiple damaged sections in structures were investigated to improve safety monitoring of simply supported beam bridges.
分析了柔度差方法应用于多位置损伤检测的局限性。
2) identification of multiple damaged locations
多损伤位置识别
3) Damage location
损伤位置
1.
The acceleration data of a simple supported steel beam model are collected separately under the conditions intact and injury, then data processed by using EMD and shape factor, the damage locations are found by comparing.
为识别简支梁桥模型的损伤位置,利用振动信号发生器、加速度传感器、信号采集仪和计算机构成信号采集分析系统,分别采集简支钢梁模型在结构完好和损伤2种工况下的加速度响应数据;采用EMD(经验模态分解法)和波形因数结合的方法分析、处理数据;得到梁在2种工况下的波形因数,根据波形因数的变化率即可找到梁的损伤位置。
2.
A simulated beam example and an experimental beam example show that the method can detect damage location with satisfactory precision.
对悬臂梁结构的数值计算和测试例子的分析表明 ,该方法能较好地识别具有多个损伤区结构的损伤位
3.
Contrast to the experimental results, the finite element analysis and simulation have been carried out to study the relation of frequency and damage degree ,damage location of the beam.
本文在对国内外碳纤维布加固钢筋混凝土梁和未加固钢筋混凝土梁动力特性研究统计分析的基础上，参照试验结果，对钢筋混凝土梁利用碳纤维布加固前后的损伤程度及损伤位置与钢筋混凝土梁固有频率之间的关系进行了有限元模拟分析。
5) damage position
损伤位置
1.
So the key to the problem is to recognize structure damage position and damage regulation accurately and timely.
所以,及时的准确的识别出结构的损伤位置和损伤程度成为解决问题的关键。
2.
The results of damage detection for hydro-pipe show the effectiveness and predominance to detect the damage positions.
通过对遗传算法损伤模式搜索过程中染色体长度的自适应调整,缩小了损伤位置的搜索范围,大大减少了搜索的计算工作量。
3.
Through elaborating theoretical basis of modal analysis, the value is researched about standard simple-supported damaged beam so as to find out the influence of different damage position on beam vibration modal and their correlation.
通过论述模态分析技术的理论基础,并对标准简支损伤梁振型的数值研究,可揭示出不同损伤位置对梁振动模态的影响,从而提出一种桥梁损伤诊断的新思路。
6) Multiple site damage
多部位损伤
1.
The key issue in multiple site damage is the calculation of stress intensity factors (SIF).
多部位损伤的中心问题在于应力强度因子的计算,本文采用FRANC2D/L对含MSD共线单排与三排孔平板进行有限元分析。
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