1) inner-radius-thickness ratio
内径-壁厚比
1.
The relationship between the wave-packet duration of ultrasonic longitudinal guided waves with lower order and the inner-radius-thickness ratio(IRTR)of free pipes was analyzed at various propagation distances, various frequency-thickness products and various cycle numbers of the input pulse signal.
在自由管材的情况下,在各传播距离、各频厚积和各激发脉冲周数上,分析了内径-壁厚比和管材中较低阶纵向导波模式波包宽度的关系。
2) inner-radius-to-thickness ratio
内径壁厚比
1.
Effects of inner-radius-to-thickness ratio of composite pipes on velocity of guided waves;
复合管内径壁厚比对导波速度的影响
3) ratio of wall thickness to size
壁厚与管径比
4) super length_diameter ratio thick wall steel pipe
超长径比厚壁钢管
1.
The paper introduced the speciality of super length_diameter ratio thick wall steel pipe part_shaping technology and the mould structure.
介绍了超长径比厚壁钢管零件成形工艺的特点及模具结构 ,设计了具有弹性的刚性凸模 ,使刚性凸模胀形达到软凸模胀形的效果 ,其3处局部胀形采用分步成形的工艺方法 ,模具凸模采用带镶件的组合件 ,可局部更换 ,使用方
5) Tube diameters/wall thickness
管径/壁厚
6) diameter-thickness ratio
径厚比
1.
The effect of diameter-thickness ratio and restraint at supports on seismic behavior,especially on hysteretic behavior,displacement ductility and ultimate relative rotation of high-performance concrete calumas filled steel tubular is discassed.
试验结果表明:支座约束及钢管径厚比是影响高性能钢管混凝土柱抗震性能的主要因素,高性能钢管混凝土柱的滞回特性、位移延性和极限相对位移受其影响显著;钢管内埋于支座并配置一定数量的抗剪钢筋是一种有效的支座嵌固形式;相同含钢率的钢管混凝土抗震性能远较钢筋混凝土试件的抗震性能好。
2.
Calculation results show that the impacting extent of bending moment at rod end on the stress of main material is closely related with the diameter-thickness ratio of steel material;by means of statistics and analysis, the correspondence between slenderness ratio and stress is given.
通过分析计算结果及对比国内外设计标准,提出了钢管塔压弯主材圆管截面的径厚比取值建议。
3.
The comprehensive analysis shows the permission compressive strength had a linear inverse ratio relationship with the built-up rate of the medium/short radius horizontal well and an exponential increased relationship with the diameter-thickness ratio.
计算结果表明,弯曲作用产生的套管截面不圆度对套管剩余抗挤强度影响不大;套管柱剩余抗挤强度与水平井弯曲段造斜率间较好地符合二次反比例关系;在造井眼斜率相同时,套管柱剩余抗挤强度与套管柱的径厚比服从指数反比例分布关系。
补充资料：凹模壁厚及凹模垫板尺寸
型腔壁部投影面积 壁 厚， 毫 米
F， 厘米2 h1 h2 h3 h4 h5
<5 15~20 30~40 <=10 15~20 30~40
>5~10 20~25 40~50 10~15 20~25 40~55
>10~50 20~30 50~60 15~20 20~30 55~65
>50~100 30~35 60~75 20~25 30~40 65~70
>100~200 35~40 75~85 25~30 40~50 70~75
>200 >40 >85 30~35 50~60 >80
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