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ひずみエネルギとそれを使った材料力学 問題12. P319「材料力学演習(20221021)」をsympyでやってみたい。3/4円弧曲がりはり

Last updated at Posted at 2024-11-28

オリジナル

問題12. P319 (pdf)「材料力学演習(20221021)一括(ver.3.3)」を勉強したい。#sympy
        ???タブレット等で、pdfを開く事ができないかも。??? 

sympyで

・ver0.1 p319 問題12. 3/4円弧曲がりはり
・t時計回り,P下向き,Q左向き

# ver0.1 p319 問題12. 3/4円弧曲がりはり
from sympy import *
var('P,M0,Q,a,t,EI')
M=Q*a*cos(t)-P*a*(1-sin(-t))                       #;print(M)
U=a/(2*EI)*integrate(M**2,(t,0,Rational(3,2)*pi))  #;print(U)
rep={Q:0}
δV=diff(U,P).subs(rep).simplify()                   ;print("#",δV) 
δH=diff(U,Q).subs(rep)                              ;print("#",δH)   
# P*a**3*(8 + 9*pi)/(4*EI)
# P*a**3/(2*EI)

いつもの? sympyの実行環境と 参考のおすすめです。

(テンプレート)

いつもと違うおすすめです。

参考

参考文献

>一部に等分布荷重を受ける単純支持はり
>JSME p89
 
>単純支持ばり 7)
>構造力学公式集 p136

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