Claus Martin Dachselt

ID:2041
First Name:Claus Martin
Last Name:Dachselt
Last Change:2019-04-02
Number of Files:30 (31st most prolific)
Number of Downloads:30,466 (358th most downloaded)

Bernoulli's Differential Equation 1.4   (details) Prime ENG   2KB/3KB
ScreenshotFinds the solution to Bernoulli's Differential Equation given as: y' + g(x)*y =(x)*y^n, calculates the constant of integration C for any initial condition y(x0) = 0, if desired, and depicts the plot of the curve of y(x).
By Claus Martin Dachselt. 2018/09/09

Buckling Length of a Concrete Column 2.1   (details) 49/50 ENG   53KB/5KB
Determines for a concrete column with length Hi fixed to a system of beams and columns the effective (buckling) length on the basis of German Regulation DIN 1045-1 and "Heft" (Manual) 525 of the "Deutscher Ausschuss für Stahlbeton". Rel. 2.1 now includes an additional method of calculation and an easier way of input for the moments of inertia of the connected beams. Tested on 49g+ and 50g.
By Claus Martin Dachselt. 2008/12/06

Circle, Secant, Tangent   (details) Prime ENG   95KB/8KB
ScreenshotBeing given a circle C described by its center (xM,yM) and radius r in combination with a point P0(x0,y0) outside, Pc(xc,yc) inside or a secant defined by f(x), this CAS-program finds characteristic items like tangents T1,T2, tangential points P1, P2, chord between P1 and P2 and some more quantities.
By Claus Martin Dachselt. 2019/02/11

Conic Sections - Equation of 2nd Order 1.03   (details) Prime ENG   23KB/12KB
ScreenshotFinds the type and characteristic items of conic sections, if the general equation of 2nd order is given in the form: a0*x² + b0*x*y + c0*y² + d0*x + e0*y + f0 = and draws the plot after calculation.
By Claus Martin Dachselt. 2019/04/02

Continuous Beam 2.01   (details) Prime ENG   189KB/19KB
ScreenshotCalculates the support moments of a continuous beam having different moments of inertia (Mb for a two-field span, Mb and Mc for a three-field beam). Several load cases for the same beam can be performed. Accepted are trapezoidal- and point loads, split in dead- and live load.
By Claus Martin Dachselt. 2018/12/09

Eclipses of Moon and Sun 1.0   (details) Prime ENG   5KB/14KB
ScreenshotFinds for a date given as yyyy.mmdd the next dates for full moon and new moon and checks for the occurence of a lunar and/or solar eclipse. If positive, some characteristics like kind of eclipse, magnitude and size of shadow in Earth radii ( E.R. ) are calculated.
By Claus Martin Dachselt. 2018/02/27

Ellipse, Secant, Tangents 1.02   (details) Prime ENG   99KB/9KB
ScreenshotBeing given an ellipse E described by its center (xM,yM), semi-major axis a and semi-minor axis b in combination with a point P0(x0,y0) outside, Pc(xc,yc) inside or a secant defined by f(x), this CAS-program finds characteristic items like tangents T1, T2, tangential points P1, P2, chord between P1 and P2 and some more quantities and draws the plot.
By Claus Martin Dachselt. 2019/02/23

Forced Oscillations 1.01   (details) Prime ENG   62KB/4KB
ScreenshotFinds for the differential equation of a forced vibration given as m*d2y/dt2 + d*dy/dt + c*y = 0*cos(omega*t) or m*d2y/dt2 + d*dy/dt + c*y = 0*sin(omega*t) or a combination of both the exact solution dependent on preset initial conditions t0, y0(t0), y'0(t0).
By Claus Martin Dachselt. 2018/09/23

Framework - 2D and 3D 1.01   (details) Prime ENG   189KB/11KB
ScreenshotFinds by means of successive calculation the member forces S and their components Sx, Sy, Sz in a 2D- or 3D-truss.
By Claus Martin Dachselt. 2018/12/09

Function Defined by Preset Conditions 1.3   (details) Prime ENG   20KB/7KB
ScreenshotFinds for a function f(x) of n-th degree ( n= 3 or 4 ) given as f(x) =*x^n + b*x^(n-1) + c*x^(n-2) + … the numerical values of the unknown coefficients a, b, c, … owing to preset conditions. These conditions may be: a given point P(x|y) as part of the graph of the function f(x), extremum or tangent in x for f´(x), point of inflexion in x as f´´(x)=- ( f´´(x)<>0 also possible ) - or the integral I (x) =nInt( f(x), x_lower, x_upper) between two points. After calculation, the graph F1(X) of the function is plotted.
By Claus Martin Dachselt. 2018/08/18

Geodetic Conversion between WGS84 and POTSDAM 1.02   (details) Prime ENG DEU   6KB/22KB
ScreenshotConverts between coordinates (UTM, sexagesimal or decimal degrees) of the WGS84 system to the corresponding coordinates (GAUSS-KRÜGER or degrees) in the POTSDAM system and vice versa, and finds the number of the German "Messtischblatt" including the marking of the 1/16 quadrant.
By Claus Martin Dachselt. 2018/02/28

GK to Long/Lat Transformation 1.0   (details) 49/50 DEU   7KB/25KB
ScreenshotThe program converts for any point in Germany geographical coordinates given in longitude/latitude to Gauss-Krueger coordinates (German grid) and vice versa on the base of POTSDAM-date. Furthermore it shows the number of the topographical card ("Messtischblatt") and the corresponding quadrant (1 - 4). Tested on 49g+/50g (Vers. 2.09).
By Claus Martin Dachselt. 2008/05/11

Lagrange Interpolation 1.1   (details) Prime ENG   2KB/3KB
ScreenshotReturns the interpolating Lagrange polynomial of minimum degree k for a set of points {x0, x1, …, xn}, {y0, y1, …, yn}, where 1 <= n-1 and n = 2, and depicts the plot of the function.
By Claus Martin Dachselt. 2018/05/22

Planes 1.2   (details) Prime ENG   57KB/14KB
ScreenshotFrom the field of Vector Algebra, finds for two planes, plane and straight line or plane and point typical properties like distance, point or line of intersection, angle between two planes.
By Claus Martin Dachselt. 2018/05/22

Point, Curve, Tangent 1.2   (details) Prime ENG   2KB/3KB
ScreenshotGiven a point (xP|yP) outside a curve described by f(x), this CAS program finds one or more tangent(s) Ti(x) through (xP|yP) to the curve, the accompanying tangential point(s) (xT|yT) on f(x) and the normal line(s) Ni(x) in (xT|yT).
By Claus Martin Dachselt. 2018/04/09

Polygonal Cross-Section 1.3   (details) Prime ENG   186KB/18KB
ScreenshotFinds for any polygonal cross-section with gaps of circle areas the main section properties, draws the plot of the contour and computes for any load combination of N, My, Mz the stresses in all input points. Furthermore the intersection points of neutral axis ( Sigma = ) and contour of the polygon are calculated.
By Claus Martin Dachselt. 2018/04/03

REGBEM_1045 2.4   (details) 49/50 DEU   52KB/10KB
ScreenshotThis program determines for a rectangular concrete beam the amount of reinforcement As2 and/or As1 on the basis of German Regulation DIN 1045-1 given the dimensions, the class of concrete and the ratio As2/As1, which may be in the range between 0 and 1. Output are the strains on the section and the total amount of reinforcement on the basis of the chosen ratio. Optionally the net area of concrete (pressure zone less As2) may be considered. Tested on both the 49g+ and 50g.
By Claus Martin Dachselt. 2009/06/27

Reinforcement of a Concrete Beam 2.01   (details) Prime ENG DEU   108KB/19KB
ScreenshotCalculates on the basis of Eurocode 2 the tension reinforcement and, if required, the reinforcement in the compression zone of a concrete beam with given geometry, quality of concrete and loads M,Ed and N,Ed. Afterwards the calculation for a shear force V,Ed is performed. Documentation in German.
By Claus Martin Dachselt. 2019/02/11

Sectn Stress 1.0   (details) 49/50 ENG   73KB/3KB
After having calculated the characteristic properties of a cross section by means of program "Sectn48" (Library 1600) this program determines for a combination of longitudinal force and/or two moments Mx and My the stresses in every point of the structure and the location of the neutral axis.
By Claus Martin Dachselt. 2008/05/11

Single-Span Girder 1.2   (details) Prime ENG   248KB/19KB
ScreenshotCalculates for a single-span girder with any number of sections and elastic restraints or external moments at the supports the support reactions, end moments and maximum field moment including its location. Each section may have a trapezoidal load and a point load at the right end. Furthermore the shear force and the internal moment for any point of the beam can be calculated.
By Claus Martin Dachselt. 2018/03/18

Single-Span Girder 4.0   (details) 49/50 ENG   127KB/13KB
ScreenshotThe program determines for a single-span girder having restraints with reference to rotations at both ends the support moments, reaction forces and maximum field moment. The degrees of restraints may be in the range of 0 % to 100 %. Accepted are up to 25 trapezoidal knife-edged and individual loads. Now the combination of attached end-/cantilever moments and elastic restraint at the same support is provided. Tested for both the 49g+ and 50g.
By Claus Martin Dachselt. 2009/06/27

Soil Pressure of a Foundation with Open Gap 1.2   (details) Prime ENG   393KB/21KB
ScreenshotComputes for a rectangular foundation submitted to vertical loads N and moments My and Mz the soil pressure for all points of the contour in consideration of a open gap (no tension possible in the gap). The automatic consideration of the own weight is provided. A plot of the area of pressure is depicted after calculation.
By Claus Martin Dachselt. 2018/04/29

Spring Constant 1.2   (details) 49/50 ENG   11KB/2KB
ScreenshotThis program determines the equivalent spring constants (vertical and rotational spring) of a one-field beam at any point of the length given its rigidity and the conditions of support at both ends. Tested on the HP 49g+ and 50g.
By Claus Martin Dachselt. 2009/08/29

Straight Lines 1.2   (details) Prime ENG   52KB/10KB
ScreenshotFrom the field of Vector Algebra, finds for two straight lines L1 and L2 the distance between the lines, the points P1 and P2 of minimal distance on both lines, the intersection angle and checks, whether the lines are parallel, skew or have a common point of intersection. If the direction vector of L2 is entered as [0], the problem is handled as straight line L1 and point P. In this case the program finds the distance, the base point of perpendicular Pn, perpendicular vector P_ and the reflected point P0'.
By Claus Martin Dachselt. 2018/05/22

System of Two Linear Differential Equations 1.01   (details) Prime ENG   3KB/4KB
ScreenshotFinds the solution to a system of two dífferential equations given as d(y1)/dx =*y1 + b*y2 + f(x) and d(y2)/dx =*y1 + d*y2 +g(x). For initial values x0, y1(x0), y2(x0) the constants of integration are calculated. A graph of both functions y1, y2 is provided.
By Claus Martin Dachselt. 2018/12/09

Tangent and Normal Line to a Curve Defined by f(x) 1.2   (details) Prime ENG   2KB/3KB
ScreenshotThis CAS program finds the normal (or perpendicular) line N(x) through a given point (xN,yN) to the curve of a given function f(x) and additionally computes the tangent in the common intersection point (xT,yT) of curve and N(x).
By Claus Martin Dachselt. 2018/04/09

Three-Edges-Supported Slab 3.1   (details) 49/50 ENG   53KB/19KB
ScreenshotThis program determines for a two-way slab supported on the left, right, and bottom edge (top edge unsupported) the significant bending moments. The supports may be hinged and/or clamped in any order. Accepted load types are: area load q, triangle-shaped load qTri, and line load on top edge qR. The ratio ly/lx must be in the range of 0.25 and 1.5. Includes now variable load factors. Tested on both the 49g+ and 50g.
By Claus Martin Dachselt. 2009/05/31

Truss 2-D and 3-D 1.04   (details) Prime ENG   227KB/13KB
ScreenshotFinds the longitudinal forces in a 2-dimensional- or 3-dimensional truss by means of solving the matrix of equations of equilibrium at the nodes for the entire system.
By Claus Martin Dachselt. 2019/02/23

Two-Way Slab - Moments and Reactions 1.2   (details) 49/50 ENG   98KB/14KB
ScreenshotThe program determines for a two-way slab supported on all edges the moments and bearing reactions on the method of PIEPER/MARTENS. All kinds of support conditions (hinged and/or clamped in any order) are provided. It now offers a wider range for the ratio Ly/Lx and a more comfortable handling for compensation between neighboring restraint moments. For both the 49 and 50.
By Claus Martin Dachselt. 2009/04/25

UTM_GK Convert 2.3   (details) 49/50 DEU   54KB/14KB
ScreenshotConverts coordinates given in UTM (map datum: WGS 84) into those of the German Potsdam Datum (Gauss-Krueger or Longitude/Latitude) and vice versa. Additionally the numbers of the corresponding German "Messtischblatt" plus the accompanying quadrants/subquadrants are output. For the conversion using UTM values, the program Geodesia 1.03 (library number 1213) is required. For both the 49 and 50.
By Claus Martin Dachselt. 2009/03/07

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