In the separate paragraph only the different anchor load was of interest, but this is already covered by the summary. The moments and forces as displayed in the paragraph step 9.
For these reasons it was decided to remove the paragraph for version 7. In step 6. This can be unfavourable when the phreatic level is below surface. When the phreatic level is upon or above the surface an increase is always favourable. Therefor steps 6. CUR states that for rough steel walls or comparable walls, the calculation of the passive earth pressure coefficient may be based on straight slip planes, provided that delta is a maximum of 30 degrees. For a rough concrete surface, a maximum delta of 35 degrees applies.
For higher values, curved or angled slip planes must be used for the calculation. The reason for this is that straight slip planes give values that are too optimistic for the passive earth pressure coefficient and that the value in the case of an increasing resistant strength will start deviating from the value determined with curved slip planes.
This occurs even if, as is usual, calculations are made with a lower wall friction angle for straight slip planes. In Table 1, Columns 2 and 3, a comparison is made between curved and straight slip planes, based on a rough wall surface. In the fourth column, the passive earth pressure coefficient is calculated for a straight slip plane with reduced wall friction angle.
It has been reduced in such a way that the passive earth pressure coefficient matches that of a straight slip plane. The angle used is displayed in Column 5. When calculating using the c,phi,delta method straight slip planes , the value should be reduced to the value in Column 5.
The reduction applies to steel walls with a delta larger then 30 degrees and rough concrete walls with a delta larger then 35 degrees. In the D-Sheet Piling user interface only the anchor plate is drawn below the anchor rod. Only the distance rod-bottom anchor plate is entered in the user interface.
For the Kranz stability this distance is required; in the calculations it is assumed that the plate runs up to the surface. For the reasons above it was decided to only draw the lower halve of the anchor plate. When method A is used, D-Sheet Piling determines the highest anchor force over all stages and verification steps 6. The verification of the anchor force is made with the verification step with the highest anchor force. A verification with method B shows a slightly different result, because for each stage the verification step with the highest anchor force is selected.
If multiple anchors are present, both methods do the verification using the same step. Where b is the acting width. This is the width of the soil that is pressing against the pile or wall. The EI must be specified for each acting width. For a sheet-pile wall, the calculation is actually performed using a standard acting width of 1m. The EI that is specified is therefore the EI of 1m of wall.
The results are also per acting width — that is, per 1m. For piles, calculations are often made with an acting width other than 1m. For example if the pile is 0. The EI of the pile must then be divided by 1. This models a situation in which 1. Another use is for constructions such as combi-walls and Berliner walls, where the acting width changes over the depth. In that case the earth pressure coefficients are not recalculated but are extracted from a file.
Notice that when a safety class is chosen, under the Design option not a complete verification will be made. This requires the Verification option. What is the difference between 'fine' and 'coarse' in the calculation options?
In D-Sheet Piling the earth pressure coefficients are calculated for each element. There are a number of European banks and banks in other countries that provide the opportunity to open a corporate account with a further connection to VisaNet. The probability of opening an account for a non-resident company in most financial institutions is low, therefore, we recommend registering a business in the country with the maximum number of contractors and opening an account in the same country.
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FB Messenger. This spreadsheet has its own page of instructions located here. Here's a spreadsheet that shows you how to do linear interpolation in Excel, a valuable skill in any engineering field. Here's a page that describes this calculation. Here's a spreadsheet contributed by Harald that shows you how to access the polynomial curve fitting capabilities of Excel!
Here's Harald's description of its capabilities:. Everybody knows that you can produce a graph and add a polyline to it. But do you know, that you also can calculate the coefficients for a polynomial in Excel from a set of data and use them in your spreadsheet directly? You also can display the function of this polyline in the graph.
You can copy and paste this formula into a cell for further use in the spreadsheet. It works, but you have only the accuracy as displayed in the graph and it is a lot of work. I did that until a coworker came up and said there is a simpler way to do it without creating a graph and the copy and paste work. This function is very well hidden in Excel and not easy to find.
I created an example spreadsheet to show how it works. Up to which order of polynomial it works, I have not tried out yet. The benefit of this function is, that you have the full accuracy of Excel for each coefficient, this is especially important for higher orders of polynomials. Here's an RF unit converter from Frank. It's an executable file that converts watts to dB-stuff and voltages, and more. Below is a screen capture that illustrates the capabilities:. We have a new page that offers some free downloads courtesy of the U.
We've only posted the topics that have to do with microwaves, radar and radio, but if there's enough interest we might upload the entire set. You can find these training manuals on many other web sites, but few have the bandwidth that we have for rapid downloads. Some lesser web sites even try to sell them!
Thanks to Steve for suggesting this idea! The previous version was missing a couple of curves. We've created a bare-bones Smith Chart using equations for circles inside an Excel file.
Then we stripped away the equations and left just the data. You can use this file any way you like, to plot data on the Smith Chart inside Excel. We'll be using it on some future spreadsheets, you betcha. Here's Kire's level diagram spreadsheet. Kire is one of our best "answerers" on the Microwaves message board, he's a prime example of what makes this a great web site.
However, to draw a miter in AutoCAD with these dimensions can get tedious with the keystroke entry of perpendiculars, offsets, and trim commands, etc. This will quickly let you put the optimum miter on any arbitrary angle from 0 to 90 degrees and you can just click-click-click your way through any bend. The table below the calculator just takes the equation and fills in a variety of widths and angles.
Pardon the minimal graphics, I made this not as a full self-explanatory file, but just something simple to give our CAD guys to speed up their work. Feel free to use or modify any of it, but this only works for AutoCAD.
Other tools use a different method for calculating miters. Here's a spreadsheet that analyzes coupled-line couplers. You can vary the coupling factor, then see what an ideal coupler does over frequency.
Be sure to turn on Excel's Analysis Toolpak! Here's a spreadsheet that will help you floorplan a power amplifier! It is described on this page. Download the power amp designer spreadsheet. Here's a spreadsheet that calculates resistor values for minimum loss L-pads which are described here :. Here's the start of a spreadsheet that looks at the array factor for phased array antenna calculations.
Well, OK, it only looks at a single line of antennas from 1 to , it would be too big to download if it simulated an entire array in two dimensions. It is far from finished, but maybe some smart person out there can take over for us and put some more effort into it.
It is useful for looking at the various tradeoffs of gain versus number of elements, grating lobes as a function of element spacing, number of phase shifter bits, type of phase shifter, and a few other things. Feedback is appreciated! Here's two contributions from Spinner GmbH, on waveguide cross sections including ordinary, reduced height, circular and double-ridged and waveguide flange dimensions, both in pdf documents.
These are the most comprehensive lists we have seen so far. As always, thanks to both of you! For January , our waveguide loss spreadsheet has been improved in several ways. We added standard rectangular waveguide all the way to WR0. All the low frequency guides are still in the spreadsheet of course, and you can even make custom cross-sections.
We made it much simpler to generate your own comparison plots, the plot starts with ten different species of guide but you can add or delete lines as required. Enjoy the improved file and make custom versions of the plot below!
Here's a table that is more complete than the other one we had on our waveguide dimensions page. It was contributed by Alan D.
It has the three primary official designations along with some commercial designations, and interior dimensions are given in millimeters and inches. Major update June we went through the coax spreadsheet with a fine-toothed comb and found a number of problems, especially with the surface roughness effect on loss. We fixed everything we spotted, and added the ability to plot coax loss versus temperature at three temperatures you choose.
Please delete all prior versions if you have stored them. Our spreadsheet performs the exact calculation of metal losses of coax with frequency splitting out the calculations for center and outer conductors.
It also computes dielectric losses due to loss tangent and dielectric conductivity and a ton of other parameters like characteristic impedance, capacitance and inductance per unit length, cutoff frequency, etc. The spreadsheet handles the offset coax calculation. Our coax calculator is a perfect example of how we wanted Microwaves to work. With the help of our loyal viewers, we've been fixing and updating the spreadsheet and are now up to version 4A. Most recently, Bob pointed out an error on the single frequency point calculation.
That's been fixed, and we made the length units include inches, feet, mm and meters. In prior versions, we fixed a bug in our coax calculator spreadsheet, as pointed out by Joe, and thanks to Sergio from Italy, added surface roughness to the calculation, a topic that we all need to better understand Here's a multi-dielectric coax calculator, contributed by Alex R.
We recently corrected a problem with the cut-off frequency calculation for single dielectric, which was pointed out by Andrew thanks! It will calculate characteristic impedance of coax that contains up to five concentric dielectrics! Be sure to check out our page that explains the math. Download the multi-dielectric coax spreadsheet.
Here's a filter calculator from Vlad, which does lumped element calculations Chebyshev and Butterworth and is very cool and admittedly better than the Excel calculator that we offer farther down the page. We now have a page that describes how to operate Vlad's calculator but it's so simple you could figure most of it out yourself. We've had a lot of positive feedback about this calculator. The latest version offers the uses control over the plot axes.
Please send us your comments on this calculator, Vlad volunteers to fix any problems you have! Contributed by Itzik! Our S-parameter Utilities spreadsheet is the ultimate tool for manipulating S-parameters into all manner of plots, including group delay, K-factor, maximum available gain, VSWR, mismatch loss, loss factor, and input and output impedance plots.
You can now quickly plot all of these parameters, from any manufacturers' S-parameters that you can download! We recently added the ability to calculate length of a transmission line if Keffective is known , or velocity factor and Keffective if length is known.
It provides reference plane extension capability, and averaging to the group delay, VF, Keffective and length calculation, and even does Smith chart plots!
We recently fixed a bug in the GMAX calculation which fixes a problem where the 15 digits of precision within Excel sometimes aren't enough! Explanation of this statement can be found here. The spreadsheet can handle lines of data, if you want a smaller file it's up to you to truncate it. The latest version includes the Stability Measure B1, thanks to Kelvin. B1 must be greater than zero to ensure stability. Download our S-parameter Utilities spreadsheet.
Back in we created the heart-shaped S-parameters file and offered it in a spreadsheet download. We all know how SNP files sometimes don't work, so we updated the file slightly and it has been verified to work in Microwave Office.
We added a second smaller heart while we were at it. We had to zip the file, otherwise it won't go through the download chute it doesn't like the. S2P extension. If you prefer, here's our S-parameter utility spreadsheet with the "heart curve" built in so you don't have to load the S-parameters into Excel. A CV failure usually indicates that you are attempting to use a credit card type that you are not authorized to accept.
Double check with BofA that you are authorized for the card type you are trying to use. Also make sure they've turned you on. I seen that happen before! If you are not using a reader, follow the link below to setup Outlook Express. You must log in or register to reply here. Ask a Question Want to reply to this thread or ask your own question?
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