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Franarea autovehiculului
Spatiul minim de franare:
|
f = 0.03 |
f = 0.02 |
f = 0.025 |
f = 0.018 |
|
|
f = 0.2 |
f = 0.4 |
f = 0.6 |
f = 0.8 |
|
|
V |
Sf min |
Sf min |
Sf min |
Sf min |
|
[m/s] |
[m] |
[m] |
[m] |
[m] |
|
0.00 |
0.00 |
0.00 |
0.00 |
0.00 |
|
2.00 |
0.89 |
0.49 |
0.33 |
0.25 |
|
4.00 |
3.55 |
1.94 |
1.30 |
1.00 |
|
6.00 |
7.98 |
4.37 |
2.94 |
2.24 |
|
8.00 |
14.18 |
7.77 |
5.22 |
3.99 |
|
10.00 |
22.16 |
12.14 |
8.15 |
6.23 |
|
12.00 |
31.91 |
17.47 |
11.74 |
8.97 |
|
14.00 |
43.43 |
23.79 |
15.98 |
12.21 |
|
16.00 |
56.73 |
31.07 |
20.88 |
15.95 |
|
18.00 |
71.80 |
39.32 |
26.42 |
20.19 |
|
20.00 |
88.64 |
48.54 |
32.62 |
24.92 |
|
22.00 |
107.26 |
58.74 |
39.47 |
30.16 |
|
24.00 |
127.64 |
69.90 |
46.97 |
35.89 |
|
26.00 |
149.80 |
82.03 |
55.13 |
42.12 |
|
28.00 |
173.74 |
95.14 |
63.93 |
48.85 |
|
30.00 |
199.44 |
109.22 |
73.39 |
56.08 |
|
30.97 |
212.55 |
116.39 |
78.22 |
59.76 |
|
f=0.03 |
f=0.02 |
f=0.025 |
f=0.018 |
|
f = 0.2 |
f = 0.4 |
f = 0.6 |
f = 0.8 |
|
Sfmin(m) in care s-a luat in considerare Fa |
|||
|
Sfmin(m) |
Sfmin(m) |
Sfmin(m) |
Sfmin(m) |
|
0.00 |
0.00 |
0.00 |
0.00 |
|
0.89 |
0.49 |
0.33 |
0.25 |
|
3.54 |
1.94 |
1.30 |
1.00 |
|
7.97 |
4.37 |
2.93 |
2.24 |
|
14.16 |
7.76 |
5.22 |
3.99 |
|
22.09 |
12.12 |
8.15 |
6.23 |
|
31.78 |
17.43 |
11.72 |
8.96 |
|
43.18 |
23.71 |
15.95 |
12.19 |
|
56.30 |
30.94 |
20.82 |
15.92 |
|
71.12 |
39.11 |
26.33 |
20.13 |
|
87.61 |
48.23 |
32.48 |
24.84 |
|
105.75 |
58.28 |
39.26 |
30.04 |
|
125.52 |
69.26 |
46.68 |
35.72 |
|
146.89 |
81.15 |
54.73 |
41.89 |
|
169.83 |
93.95 |
63.40 |
48.53 |
|
194.32 |
107.66 |
72.69 |
55.66 |
|
206.74 |
114.62 |
77.41 |
59.29 |
Spatiul de oprire:
S0=Sfmin+Ss
Ss-spatiul suplimentar Ss=Vn*(t0+t1)
|
t1= |
0.5 |
timpul in care sistemul de franare intra in actiune | |
|
to= |
0.7 |
timpul scurs pentru franare din momentul perceperii franarii |
|
|
φ=0.2 |
φ=0.4 |
φ=0.6 |
φ=0.8 |
|
|
V(m/s) |
S (m) |
S0(m) |
S0(m) |
S0(m) |
|
0.00 |
0.0 |
0.0 |
0.0 |
0.0 |
|
2.00 |
3.3 |
2.9 |
2.7 |
2.6 |
|
4.00 |
8.3 |
6.7 |
6.1 |
5.8 |
|
6.00 |
15.2 |
11.6 |
10.1 |
9.4 |
|
8.00 |
23.8 |
17.4 |
14.8 |
13.6 |
|
10.00 |
34.2 |
24.1 |
20.2 |
18.2 |
|
12.00 |
46.3 |
31.9 |
26.1 |
23.4 |
|
14.00 |
60.2 |
40.6 |
32.8 |
29.0 |
|
16.00 |
75.9 |
50.3 |
40.1 |
35.2 |
|
18.00 |
93.4 |
60.9 |
48.0 |
41.8 |
|
20.00 |
112.6 |
72.5 |
56.6 |
48.9 |
|
22.00 |
133.7 |
85.1 |
65.9 |
56.6 |
|
24.00 |
156.4 |
98.7 |
75.8 |
64.7 |
|
26.00 |
181.0 |
113.2 |
86.3 |
73.3 |
|
28.00 |
207.3 |
128.7 |
97.5 |
82.4 |
|
30 |
235.4 |
145.2 |
109.4 |
92.1 |
|
30.97 |
249.7 |
153.6 |
115.4 |
96.9 |
Deceleratia
|
V |
af(f=0.2) |
af(f=0.4) |
af(f=0.6) |
af(f=0.8) |
|
[m/s] |
[m/s^2] |
[m/s^2] |
[m/s^2] |
[m/s^2] |
|
| ||||
Stabilitatea autovehiculului
Se determina viteza critica de rasturnare si viteza de derapare pe drum drept.
Coef de aderenta 0.2
|
Raza de viraj |
Unghiul de inclinare al drumului beta |
|
Vd [km/h] |
|
Coef de aderenta 0.4
|
Raza de viraj |
Unghiul de inclinare al drumului beta |
|
Vd [km/h] |
|
Coef de aderenta 0.6
|
Raza de viraj |
Unghiul de inclinare al drumului beta |
|
Vd [km/h] |
|
Coef de anderenta 0.8
|
Raza de viraj |
Unghiul de inclinare al drumului beta |
|
Vd [km/h] |
|
|
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