2011 年招收攻读硕士学位研究生入学考试试题 A 卷*30260.1.2.A()B1-2CDCA.cbaoB.cbf (bf oa)C.ce (ce oa)D.cd (cdo )abc1-2ofed3.1-3ABCD1-34.A.B.C.D.815.1-5A. a2B. a2d2/4C.d2/4D.db1-56.A.B.C.D.7.1-7max()A.B.C.D.max=100MPamax=0max=50MPamax=200MPa1-78.1-8ACABCDA. 4B. 2C. 3 4DBACD1-89.1-9dA .1214B .1418C .1818D .18116qAB1-982d10.11.A.C.A.B.C.D.44B.D.12.A.B.C.D.x=2mx=2mx=2mx=2mM4m3KNmM1-12x1-123KNm2m2m13.1-13mm()1-13mAmCmmmmDBmm14.A.B.C.D.8315.A.BCD16.A.B.C.D.17.A.B.C.D.18.A.B.C.D.19.A.B.C.D.20.1-20A. 0.5B. 0.5 0.7C. 0.7 .01A.B.C.D.8422.2-22()yA.B.yCzC.D.zyxCx2-2223.1-231 234P12341-231A2B3C4D24.1-24AABx ADy ACA.B.C.D.=2x2yyDyAxCB1-24x25.A.B.C.D. xcos xsin = +8526.1-26100MPaA.B.C.1-26D.27.EIwcA. wc =5ql 448EI2q3qB. wc =4128EIAqCB1-27C. wc =D. wc =5ql 4256EI5ql 4384EIal /2l /2BCbA. cB. clPBlCBlCPC. BD. B +clA.aB.bAaAbC.D.cPabc81-2965ql30.1-30abcdFPmaxFPFPFPFP(a)A FPmax a =FPmax c(b)FPmax b1-30= FPmax d(c)(d)B FPmax a =FPmax c =FPmax b= FPmax dC FPmax a = FPmax dFPmax b= FPmax cD FPmax a = FPmax b FPmax c = FPmax d1521.5m20KN3m图 2153AEAPAa3a5KN/m3ma2087 = 160 MPa = 100 MPammI z = 5283.96cm4Wz = 422.72cm3*118200kN10kN/m200kN 1310ACDB250z4200.2m2m0.2m1KN/m2D=100mm2.2m.d=90mmAB52m0.6m2m1 -1B115Al1 = 2 l2 , P = q l1, m = q l12 .62.2mI z / Smax = 21.27cm