日期:23-04-04 時間:02:19 來源: 益榮金屬
下面求解式(3-43), 令(12N0/mL3)(T-T2)=θ,且tanθ=K, 則:
w(T)=[w1+w2+(M0U+M0C)/N0]·cosθ·[√(12N0/mL3)]3R2v1/L2·sinθ-M0U+M0C/N0
=[w1+w2+(M0U+M0C)/N0]·cosθ·{1+[√(mL3/12N0)]sinθ/[w1+w2+(M0U+M0C)/N0]cosθ}
=[w1+w2+(M0U+M0C)/N0]·cosθ·(1+tan2θ)-(M0U+M0C)/N0
=[w1+w2+(M0U+M0C)/N0]·(1/cosθ)-(M0U+M0C)/N0
=[w1+w2+(M0U+M0C)/N0]·[1+tan2(θ/2)]/[1-tan2(θ/2)]-(M0U+M0C)/N0 (3-44)
由tanθ=[√(mL3/12N0)]·3R2v1/{L2[w1+w2+(M0U+M0C)/N0]}=K,可求得:
tan(θ/2)={[√(1+K2)]-1}/K (3-45)
將式(3-45)代入式(3-44),得:
w(T)=[w1+w2+(M0U+M0C)/N0]·〔1+{[√(1+K2)]-1}/K〕/〔1-{[√(1+K2)]-1}/K〕-(M0U+M0C)/N0
=[w1+w2+(M0U+M0C)/N0]·〔K2+{1+K2-2[√(1+K2)]+1}/K2-{1+K2-2[√(1+K2)]+1}〕-(M0U+M0C)/N0
=[w1+w2+(M0U+M0C)/N0]·[√(1+K2)]-(M0U+M0C)/N0
=〔√{[√(mL3/12N0)]·(3R2v1/L2)}2+[w1+w2+(M0U+M0C)/N0]2〕-(M0U+M0C)/N0 (3-46)
上式即為板中心點(diǎn)的最終撓度。
因此,夾芯板中心點(diǎn)的最終響應(yīng)時間和最大撓度分別為:
T=T2+[√(mL3/12N0)]·tan-1·{3R2v1/L2[√(12N0/mL3)][w1+w2+(M0U+M0C)/N0]} (3-47)
w(T)=〔√{[√(mL3/12N0)]·(3R2v1/L2)}2+[w1+w2+(M0U+M0C)/N0]2-(M0U+M0C)/N0 (3-48)
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