1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
|
% vim: ts=2 sw=2 et :
\documentclass[tikz, border=2mm]{standalone}
\usepackage{times}
\usepackage{txfonts}
\begin{document}
\begin{tikzpicture}[
axis/.style = {very thick, -latex},
axis tick/.style = {
draw, draw = black, fill = black, rectangle,
inner sep = 0pt,
minimum height = 2mm,
minimum width = 1pt,
},
string/.style = {
ultra thick, draw = black,
},
string end/.style = {
string, circle, fill = gray,
inner sep = 0pt, minimum size = 1mm,
},
force/.style = {
very thick, draw = gray, -latex,
},
]
% axes
\draw[axis] (0, 0) -- (8cm, 0) node[right] {$x$};
\draw[axis] (0, 0) -- (0, 5cm) node[above] {$u(x, t)$};
% axes ticks
\node[axis tick, label = {-90:$x_0$}] at (2cm, 0) {};
\node[axis tick, label = {-90:$x_0 + dx$}] at (6cm, 0) {};
% string
\coordinate (A) at (2cm, 2cm);
\coordinate (B) at (6cm, 4cm);
\draw[string] (A) to[out = 40, in = 200] (B);
\draw[force] (A) -- ++(220:15mm) node[gray, below right] {$T_1$};
\draw[force] (B) -- ++(20:15mm) node[gray, above left] {$T_2$};
\draw[dashed, gray, thick] (A) -- ++(-15mm, 0);
\draw[gray, thick] (A) ++ (-7mm,0) arc (180:220:7mm)
node[midway, left] {$\alpha$};
\draw[dashed, gray, thick] (B) -- ++(15mm, 0);
\draw[gray, thick] (B) ++ (7mm,0) arc (0:20:7mm)
node[pos = 0, below] {$\beta$};
\node[string end, label={110:$P_1$}] at (A) {};
\node[string end, label={110:$P_2$}] at (B) {};
\end{tikzpicture}
\end{document}
|
