杆件的横截面积不能为零。
对一个单位面积来说，电线杆或烟囱上的荷载要比工字架上的荷载小。
For a unit of projected area the loading on a telephone pole or a smokestack will be less than on an I - beam.
对一个单位面积来说，电线杆或烟囱上的荷载要比工字架上的荷载小。
For a unit of projected area the loading on a telephone pole or a smokestack will be less than on an i-beam.
本文给出了在桁架各杆横截面积不得为零时的实现满应力设计的必要条件。
This paper deals with the necessary conditions by which a full stressed design can be found while the area of each member does not vanish.
结果表明1。各类变幅杆的放大系数均随面积系数的增大而增大。
The results showed that: 1. Magnification factor was as area index increases.
本文推导了分段线性材料桁架结构的位移对截面积的灵敏度，并给出三杆桁架实例。
The present paper gives the derivation of the displacement sensitivity of truss structures made of piece wise linear material, with respect to the cross sectional areas of bars.
采用的力学准则为满应变设计准则； 在整个桁架结构重量满足一定约束的前提下，通过优化各杆件截面积，达到整体柔度最小。
Under the premise of the weight of the entire truss structure satisfying certain constraints, it achieved the minimum flexibility by optimizing the cross-sectional area of the bar.
本文从曲柄滑块机构中各杆件组成的三角形面积观点出发，分析了曲柄滑块机构中各参数与其面积的内在联系，从而得出相关参数的设计准则。
Based on the area of a triangle, the paper analyses the interior connection between crank structure and areas of triangle, then provides the design rules for its data.
锚杆支护巷道顶板冒落具有突发性和冒落面积大的特点，安全监测非常必要。
Roof falling of rock bolting supported tunnel is usually paroxysmal in a big area, so safety monitoring is of great importance.
探讨该并联机器人机构的工作空间面积性能指标与杆件尺寸之间的关系，并在设计空间里绘制相应的工作空间面积性能图谱。
The relationship between the link lengths and the workspace area performance index of this manipulator is investigated too, and the area performance atlases are plotted in design space.
由变幅杆大端直径、放大倍数、面积系数等已知条件，按照变幅杆设计理论对超声振动系统中的变幅杆进行设计；
According to the designing theory of amplitude amplifier pole, it could be designed by big end diameter, magnification, area index and other parameters.
对常用钢屋架的弦杆腹杆截面积比值作了统计分析，以便设计者能更准确地确定计算原始参数。
Statistical analysis for cross-sectional area ratios of chord and web members commonly used in steel roof trusses are also provided for reference in predictng fundamental calculation parameters.
R 1受几个因素的影响，包括目标和顶杆的材料和状况、顶尖的表面积和形状以及所施加的力的大小。
R1 is influenced by several factors, including the material and condition of the target and plunger, the surface area and shape of the plunger tip, and the amount of force applied.
压杆的稳定设计是通过计算压杆截面积选用截面形状来达到的。
The stable design of compressed rods is realized by calculating the cross aero and selecting the shape of rods.
产品迎风面积小，稳定性高，有效降低了风阻，减轻灯杆的负荷，有利于抗风，安全可靠。
Small frontal area and high stability reduce the wind resistance effectively and load of lamp pole, which is advantaged for going against the wind, make it safe and reliable.
对于稻壳、树叶、棉花杆、玉米杆四种生物质焦，通过压汞法测量了其在大孔和部分中孔范围内的孔隙结构，发现热解温度、热解保持时间、热解快／慢速都会影响着焦样的比表面积和平均孔径。
The results show that pyrolysis temperature, pyrolysis time and pyrolysis rate have an obvious effect on the special surface area(SSA) and average pore size(APS) of the biomass chars.
设计了一种便于携带、使用性强的锚杆测量仪，用来评估现场的施工情况及大面积检测。
Have designed one kind of the anchor measuring apparatus which has strong practicability and is convenient to carry, used for assessing the construction quality of the anchor.
倾斜锚杆加固的节理抗剪强度比垂直锚杆大，提高锚固面积比能显著提高节理抗剪强度。
The shear resistance of bolted joint can be obviously improved by higher ratio of bolt section to bolted joint area and inclined bolt.
深部软岩巷道中大面积锚杆、锚索破断现象是巷道支护面临的一个难题。
Many breakings in anchor bolts and cables in tunnel of deep soft rock were one of problems faced by roadway supporting.
在帆面的上方是一根短的圆杆，称为斜桁(gaff)，使得帆面可以在第四条边上延长，因而比同等高度的三角帆面积更大。
At the top of the sail is a short SPAR called the gaff, which allows the sail to extend back along a fourth side, gaining size over a triangular sail of the same height.
在帆面的上方是一根短的圆杆，称为斜桁(gaff)，使得帆面可以在第四条边上延长，因而比同等高度的三角帆面积更大。
At the top of the sail is a short SPAR called the gaff, which allows the sail to extend back along a fourth side, gaining size over a triangular sail of the same height.
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