10502g computing power
The formula for calculating the theoretical weight of square tube is
4 x wall thickness x (side length wall thickness) x 7.85
where the side length and wall thickness are in mm, and the value is directly substituted into the above formula to get the weight of square tube per meter, in gram
For example, the weight per meter of a 30 x 30 x 2.5 mm square tube can be calculated according to the above formula:4 x 2.5 x (30-2.5) x 7.85 = 275 x 7.85 = 2158.75 g, which is about 2.16 kg.
when the wall thickness and side length are in mm, the volume per meter of square tube can be calculated by 4 x wall thickness x (side length wall thickness), which is in cubic centimeter, And then multiply the specific gravity of iron by 7.85 g per cubic centimeter to get the weight in grams per meter square tube
Simple calculation of vertical bearing capacity: P = (4 * n * PI ^ 2 * e * I) / [(L / 2) ^ 2]
The calculated compressive stress is the compressive stress proced by the vertical pressure acting on the cross section of the square tube. This is relatively simple, that is, the pressure (in n) divided by the cross-sectional area of the square tube (in M2). As long as the compressive stress is less than the allowable stress of the material Due to the interaction of pile cap, pile and soil, the bearing capacity and settlement behavior of pile group foundation under vertical load are often significantly different from that of single pile with the same setting method under the same geological conditions, which is called pile group effect. The bearing capacity of pile group foundation is not always equal to the sum of the bearing capacity of each single pilepile group effect is shown in the following aspects: lateral resistance, end resistance, soil reaction of pile cap, load distribution on pile top, failure mode of pile group, settlement of pile group and its variation with load
extended data
square tube process classification
square tube is divided into hot rolled seamless square tube, cold drawn seamless square tube, extruded seamless square tube and welded square tube according to proction process
The welded square tubes are divided into:1, arc welding square tubes, resistance welding square tubes (high frequency, low frequency), gas welding square tubes, furnace welding square tubes
2, straight seam welding square tubes, spiral welding square tubes
classification of section shape
classification of square tubes according to section shape:
1, simple section square tubes square tubes, rectangular square tubes
2 Square pipes with complex cross section: flower shaped square pipe, open-ended square pipe, corrugated square pipe, special-shaped square pipe
This method can improve the leaching rate and the extraction rate is high. The leaching agent can also be directly injected into the upper part of the deposit for leaching. This method is more economical and does not need to mine ore, especially for tailings and lean ore. If the ore powder and the leaching agent are put in the same container and stirred by air or machinery, it has the advantages of fast extraction speed and high yield
Windows 2000 / Linux is best
XP is troublesome to set up firewalls, concurrent connections, EFS, etc.
PS: by the way, this kind of thing doesn't improve you at all. You should use other people's tools and follow other people's tutorials, right, I like Linux better, open source software, taishuang Russia, right