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习题解答结构力学结构力学龙驭球第三版课后习题答案1习题解答结构力学第二章结构的几何构造分析2进行几何构造分析：P.372-1(b)2-2(b)P.372-3(c)2-4(d)(e)P.382-6(b)(c)2-7(a)P.392-8(a)(b)2-92-10(b)求计算自由度：P.392-10(b)2-12习题解答结构力学3P.372-1(b)三链杆交于一点，瞬变123习题解答结构力学4P.372-2(b)习题解答结构力学5几何不变，无多余约束习题解答结构力学6几何不变，有一个多余约束P.372-3(c)有一个多余约束123习题解答结构力学7P.372-4(d)IIIIIIO(I、II)IIIIIO(II、III)IO(I、III)12铰O(I、II)、O(II、III)的连线与1、2两链杆不平行，体系几何不变，无多余约束习题解答结构力学8P.372-4(d)IIIIII1234O(I、II)O(II、III)O(I、III)1234IIIIII形成两无穷远瞬铰O(I、II)、O(II、III)的4根链杆1、2和3、4不全平行，体系几何不变，无多余约束IIIIII习题解答结构力学9P.372-4(e)习题解答结构力学10P.372-4(e)三杆共线，瞬变习题解答结构力学11P.382-6(b)几何不变，无多余约束习题解答结构力学12P.382-6(c)三杆共点，瞬变习题解答结构力学13P.382-7(a)几何不变，无多余约束习题解答结构力学14IIIIB12AIIO(II,III)铰A、B的连线与1、2两链杆不平行，体系几何不变，无多余约束III2III1O(II,III)BA铰A、B共点，与链杆1、2形成的无穷远瞬铰共线，体系瞬变P.392-8(a)2-8(b)习题解答结构力学15P.392-9习题解答结构力学16几何不变，无多余约束IIIIIIIIIIIIO(I、II)O(I、III)O(II、III)习题解答结构力学17三铰共线，瞬变O(I、III)IIIIIIO(I、II)O(II、III)习题解答结构力学18几何不变，无多余约束IIIIIIO(II、III)O(I、II)IIIIIIO(I、III)习题解答结构力学19P.392-10(b)铰A、B的连线与1、2两链杆平行，体系瞬变21AB习题解答结构力学20P.392-12S=3m-(3g+2h+b)=3×1-(3×4+2×0+3)=-12S=3m-(3g+2h+b)=3×8-(3×2+2×9+3)=-3几何不变，12个多余约束几何不变，3个多余约束习题解答结构力学第三章静定结构的受力分析3.1梁的内力P.1073-1(b)(c)(e)P.1083-221习题解答结构力学22P.1073-1(b)用分段叠加法作梁的M图88A2lq88lq2l82lqBq2lqq2l2lq882lq2lq88lq282lq88A2lq88lq2l82lqBq2lqq2l习题解答结构力学P.1073-1(c)用分段叠加法作梁的M图23PFBAClFP44FPl2l2lABC4lPF4FPl2FPlM图PFBAClFP44FPl2l2lABC4lPF4FPl2FPl习题解答结构力学24P.1073-1(e)用分段叠加法作梁的M图A2kN.m4m3kN/mB2mAB(4)26(3)1.5621.5M图(kN.m)A2kN.m4m3kN/mB2mAB(4)26(3)1.5621.5习题解答结构力学25P.1083-2判断内力图正确与否，将错误改正(a)BqMMM图FQ图FQ图M图BMqM习题解答结构力学26P.1083-2判断内力图正确与否，将错误改正(a)BqMMM图FQ图FQ图M图BMqM习题解答结构力学27P.1083-2判断内力图正确与否，将错误改正(b)M图FQ图FQ图M图习题解答结构力学28P.1083-2判断内力图正确与否，将错误改正(b)M图FQ图FQ图M图习题解答结构力学29P.1083-2判断内力图正确与否，将错误改正(c)FQ图M图M图FQ图习题解答结构力学30P.1083-2判断内力图正确与否，将错误改正(c)FQ图M图M图FQ图习题解答结构力学31P.1083-2判断内力图正确与否，将错误改正(c)FQ图M图M图FQ图习题解答结构力学32P.1083-2判断内力图正确与否，将错误改正(d)M图FQ图M图FQ图习题解答结构力学33P.1083-2判断内力图正确与否，将错误改正(d)M图FQ图FQ图M图习题解答结构力学34P.1083-2判断内力图正确与否，将错误改正(e)FQ图M图FQ图M图FQ图M图M图FQ图FP2FP1FP1FP2习题解答结构力学35P.1083-2判断内力图正确与否，将错误改正(e)FQ图M图FQ图M图FQ图M图FP2FP1M图FQ图FP1=FP2习题解答结构力学36P.1083-2判断内力图正确与否，将错误改正(e)FQ图M图FQ图M图FQ图M图FP2FP1FQ图M图FP1FP2习题解答结构力学373.2静定多跨梁P.1113-5(a)求支座反力，作梁的内力图2m20kN2.5m1.5m1.5m4.5m3m3m6m6m6m10kN20kN/m8.98kN20kN15.08kN10kN10.44kN4.5kN20kN/m276.16.758.1M图FQ图464.58.98114.52m20kN2.5m1.5m1.5m4.5m3m3m6m6m6m10kN20kN/m8.98kN20kN15.08kN10kN10.44kN4.5kN20kN/m276.16.758.1M图FQ图464.58.98114.5M图(kN.m)FQ图(kN)习题解答结构力学383.3静定平面刚架必作题：P.1093-3(b)(d)(f)(j)P.1103-4(a—i)P.1113-7(a)P.1123-8(a)(d)选作题：P.1093-3(a)(e)(g)(l)P.1123-8(c)P.1123-9(a)P.1133-11习题解答结构力学39P.1093-3(b)速画M图aqABCqa2ABqaC2qa222qa2ABaqqaAqaC2B2qa222Cqa2qa28qa728M图习题解答结构力学40P.1093-3(d)速画M图AlDBC2h2lqh28qhA2qh2qhB22qh22lDCqAlDBC2h2lqh2Aqh2qhB22qh22lDC8qh28qh23M图习题解答结构力学41P.1093-3(f)速画M图AlDBCh2ql8qlA22qlBDCqAlDBCh2ql8qlA22qlBDCqM图习题解答结构力学42P.1103-3(j)速画M图MMABABCDMMEMDMMCMEMMABABCDMMEMDMMCMEM图习题解答结构力学43P.1103-4(a)判断M图的正误，并改正错误ABCDFPFPABDCABCDFPFPABDC习题解答结构力学44P.1103-4(b)判断M图的正误，并改正错误DABCFPADBPFCDABCFPADBPFC习题解答结构力学45P.1103-4(c)判断M图的正误，并改正错误ADBPFCABFPDCADBPFCABFPDC习题解答结构力学46P.1103-4(d)判断M图的正误，并改正错误AABFPDCEBECDFPAABFPDCEBECDFP习题解答结构力学47P.1103-4(e)判断M图的正误，并改正错误qqqq习题解答结构力学48P.1103-4(f)判断M图的正误，并改正错误AAFPDCEBFPECDBAAFPDCEBFPECDB习题解答结构力学49P.1103-4(g)判断M图的正误，并改正错误ABDCqABqDCABDCqABqDC习题解答结构力学50P.1103-4(h)判断M图的正误，并改正错误aFPPFaPFaPFaPFaaFPPFaPFaPFaPFa习题解答结构力学51P.1103-4(i)判断M图的正误，并改正错误DABCqABCqDDABCqABCqD习题解答结构力学52P.1113-7(a)作刚架的内力图aBqqaa2aBqaqqaqa85817qaqa22qaqa182M图习题解答结构力学53P.1113-7(a)作刚架的内力图aBqqaa2aFQ图qa5qa8138qa2qa1习题解答结构力学54P.1113-7(a)作刚架的内力图aBqqaa2aFN图8qa55qa8习题解答结构力学55P.1123-8(a)作三铰刚架的内力图5m6m5m2kN/m2.57.52.082.0812.512.512.512.5M图(kN.m)习题解答结构力学56P.1123-8(a)作三铰刚架的内力图5m6m5m2kN/m7.52.5(kN)FQ图2.082.08习题解答结构力学57P.1123-8(a)作三铰刚架的内力图5m6m5m2kN/m(kN)FN图2.57.52.08习题解答结构力学58P.1123-8(d)作三铰刚架的内力图10m5m2.5m2.5m5mqM图7.5q2.81q7.5q2.81q3.13q9.37q12.5q习题解答结构力学59P.1123-8(d)作三铰刚架的内力图10m5m2.5m2.5m5mq5q2.5qFQ图0.91q0.91q5q2.5q习题解答结构力学60P.1123-8(d)作三铰刚架的内力图10m5m2.5m2.5m5mq7.96qFN图7.96q2.81q习题解答结构力学必作题：P.1133-13(b)(d)(f)P.1143-14(a)(b)(c)P.1153-17(a)(d)P.1163-18(b)选作题：P.1163-18(a)P.1173-20613.4静定平面桁架习题解答结构力学62P.1133-13(b)分析桁架类型，指出零杆PF联合桁架，10根零杆。FP习题解答结构力学63P.1133-13(d)分析桁架类型，指出零杆简单桁架，6根零杆。PFPF习题解答结构力学64P.1133-13(f)分析桁架类型，指出零杆复杂桁架，8根零杆。PFFPFPPF习题解答结构力学65P.1143-14(a)讨论桁架中指定杆内力的求法PF6a2aa2FPabb6aa2FPFP2aa1)零杆b6aa2FPFP2aa112)作截面1-1求FNa。b6aa2FPFP2aa223)作截面2-2求FNb。习题解答结构力学66P.1143-14(b)讨论桁架中指定杆内力的求法8a10kN1aa2310kN18a2310kNaa10kN1)零杆18a2310kNaa10kNA2)由结点A求1杆轴力。18a2310kNaa10kNAmm3)作载面m-m求2、3杆轴力。习题解答结构力学67P.1143-14(c)讨论桁架中指定杆内力的求法4m×8=32m10kN4mabc30kN10kN10kN10kN10kNABDC10kNA10kN10kN4m×8=32mcDBba10kN10kN30kN4mCFRA1)D以左，由∑MD=0求得A支座反力。10kNA10kN10kN4m×8=32mcDBba10kN10kN30kN4mCFRA112)作1-1截面求得FNc。10kNA10kN10kN4m×8=32mcDBba10kN10kN30kN4mC11FRC3)由整体平衡求得支座C的反力。10kNA10kN10kN4m×8=32mcDBba10kN10kN30kN4mC11FRC224)作2-2截面求得FNa、FNb。习题解答结构力学68P.1153-17(a)用结点法或截面法求桁架各杆的轴力4kN4m3m3m4m8kN4kN4kN8kN12kN-43500-1.33-6.67-6.67-1.670-4-8.336.67习题解答结构力学69P.1153-17(d)用结点法或截面法求桁架各杆的轴力P2BAFCP1F4aFP2DaP1FP2BAFCP1F4aFP2DaP1F0000000-FP2P1-FP1-F22习题解答结构力学70P.1163-18(b)求桁架中指定杆的内力FN1=52.5kNFN2=18kNFN3=-18kN4m18m12320kN20kN40kN习题解答