富港检测技术(东莞)有限公司_
2024-04-02 广告
2024-04-02 广告
正弦振动多用于找出产品设计或包装设计的脆弱点。看在哪一个具体频率点响应最大(共振点);正弦振动在任一瞬间只包含一种频率的振动,而随机振动在任一瞬间包含频谱范围内的各种频率的振动。由于随机振动包含频谱内所有的频率,所以样品上的共振点会同时激发...
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df/dx =f^2-6f+8
∫df/(f^2-6f+8) =∫dx
∫df/[(f-2)(f-4)] =x
(1/2)∫[1/(f-4) - 1/(f-2) ]df =x
(1/2)ln| (f-4)/(f-2)| = x+C
f(x0)=2
(1/2)ln| (x0-4)/(x0-2)| = 2+C
C = (1/2)ln| (x0-4)/(x0-2)| -2
(1/2)ln| (f-4)/(f-2)| = x+(1/2)ln| (x0-4)/(x0-2)| -5
x = (1/2)ln| (f-4)/(f-2)| +2 -(1/2)ln| (x0-4)/(x0-2)|
f(x0)=3
x = (1/2)ln| (f-4)/(f-2)| +3 -(1/2)ln| (x0-4)/(x0-2)|
f(x0)=4
x = (1/2)ln| (f-4)/(f-2)| +4 -(1/2)ln| (x0-4)/(x0-2)|
f(x0)=5
x = (1/2)ln| (f-4)/(f-2)| +5 -(1/2)ln| (x0-4)/(x0-2)|
∫df/(f^2-6f+8) =∫dx
∫df/[(f-2)(f-4)] =x
(1/2)∫[1/(f-4) - 1/(f-2) ]df =x
(1/2)ln| (f-4)/(f-2)| = x+C
f(x0)=2
(1/2)ln| (x0-4)/(x0-2)| = 2+C
C = (1/2)ln| (x0-4)/(x0-2)| -2
(1/2)ln| (f-4)/(f-2)| = x+(1/2)ln| (x0-4)/(x0-2)| -5
x = (1/2)ln| (f-4)/(f-2)| +2 -(1/2)ln| (x0-4)/(x0-2)|
f(x0)=3
x = (1/2)ln| (f-4)/(f-2)| +3 -(1/2)ln| (x0-4)/(x0-2)|
f(x0)=4
x = (1/2)ln| (f-4)/(f-2)| +4 -(1/2)ln| (x0-4)/(x0-2)|
f(x0)=5
x = (1/2)ln| (f-4)/(f-2)| +5 -(1/2)ln| (x0-4)/(x0-2)|
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