E-CodeBeam reactions, shear and moment for a point load — a TI-89 Titanium program
BEAM89 is a TI-89 BASIC program for the TI-89 Titanium. A simply supported beam with one point load P at a from support A: both support reactions, the largest shear and the largest bending moment and where it is. Whole-number answers stay whole.
What it asks for and what it shows
It asks for 3 values at its prompts. In the example below it shows RA kN, RB kN, Vmax kN, Mmax kN*m, at x m.
Example run
One of its oracle test cases: “the ad's beam: P=12 kN, L=6 m, a=2 m”. The inputs are typed in order, and the results are the values the case expects on the screen.
| Step | Value |
|---|---|
| You enter | |
| Input 1 | 12 |
| Input 2 | 6 |
| Input 3 | 2 |
| The screen shows | |
RA kN= | 8 |
RB kN= | 4 |
Vmax kN= | 8 |
Mmax kN*m= | 16 |
at x m= | 2 |
How it's checked
8 test cases, each checked against an independent method. Replayed key by key on a virtual TI-89 Titanium, they make 52 checks.
How E-Code checks every program
Run it or put it on your calculator
- Open the library in the TI-89 Titanium calculator and pick “Beam reactions, shear and moment for a point load” (BEAM89).
- Put it on your own calculator with a computer and a USB cable, or type it in by hand.