面积·重心·截面二阶矩的计算.pdf

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1、〔〔技術データ〕技術データ〕面面積積·重重心心·断断面二次モーメントの計算面二次モーメントの計算[技术参数]面积·重心·截面二阶矩的计算截面AeIZ=I/e截面AeIZ=I/eghbh3bh2`bh2QabaQba3=0.7854ba3Qba2=0.7854ba2d12644aae11Qghh4h3dq=0.4244r-8r4Z1=0.2587r3dh2Qr2(89Q)21262e301q2=0.1098r4Z2=0.1908rdg=0.5756re1dh42dq=0.4244rZ=0.1296r32233Q241hh120.11793h=hr0.055rg2124

2、e2Z2=0.0956r3g01dq=0.5756radgbh2bh3bh2Hbhb(H-h)2b(H3-h3)(H3-h3)233624d126HagGad13b+2b2222`@A4-a4144(2b+bhM16b+6bb1+b136b+6bb1+b1222AA-adg1)3hhhA-a2126A22b+b136(2b+b1)12(3b+2b1)a0a0@1a1`44A-a35d2A4-a412A2dr3A2-a2A4r=0.866r82120.1179(A4-a4)@=q@A33r2532r4=0.5413r416=2.598r2q44Q44Qd2-d1d53

3、0Qd64(d21-d)32(d2)qrr3=0.5413r3c(d2-d2)216Qd4212Q44=(R4-r4)QR-r4=M4Rc1c1+22r4Qd2a13Q143Q4q2.828r20.924r20.6906r3da2-(a4-d4)(a-d)d64`4212166a16=0.6381r``a11c13Q13Qa2b(h-d)h{d4d42b=43d1216336h{160.8284a1+20.0547a0.1095aQ2+b(h-d)+b(h3-d3)ag+d2d=0.4142a433+b(h-d)+b(h-d)aa}}技a11术Qd4Qr4Qd3Qr

4、3q==c013Q(d4-d4)13Q(d4-d4)参6443242b(h-d)+12{1616h{1612d=0.0491d4=0.0982d3ch3333数2Qdd+b(h-d)+b(h-d)dQr=42Q211≈0.05d4≈0.1d3ag(d2-d2)3341+b(h-d1)}}+b(h-d1)c=0.7854r4=0.7854r3qA:截面积e:重心的距离I:截面二次力矩Z=I/e:截面系数0.0075r42Qe1e20r(1-4)=0.2234r4=0.00966r3d0.0075r1Bq=0.2146r2e23d8/=0.7766r≈0.01r2638