《理论力学》课程教学资源（PPT讲稿）第二讲 受力分析习题课

受力分析习题课

受 力 分 析 习 题 课

画出各构件的受力图 F B A B R 0 F F A D 0 D U B A, D B eA B R

画出各构件的受力图 ·o 2. 1. A B A B A D B D α A B α O A B F  F  F  F  A D B α F  F  ND  NB  XA  YA  RA  NB  XA  YA  ND  RA 

3 R F F FA R R R F F F R

3. C B A C A C A B F C  F F F RC   RB  RC′ RC′ XA  YA  RA  RC  4. F B C AC B A C B A · O C B A N A  R C  C A B F XC  YC F F NA  NA 

B cy R

B A B C D E D 5. B C A D E F F RB   RA  RB′ XC  YC  ND  ND′ RE  B C D R B′  R C  N D′ 

6 B B A B D R D R B B D A R B B B P

6. B A D CB B B D A C T1  B DA C P P P T2  T2′ RD  RC  RD  XB  YB  XA  YA  XA  YA  XB  YB  RC′ XB′ YB′ XB′ YB′ T1 

q m BITIN D B F m D C F D

q D m B C A 7. D C q m FD FCy FCx C A B FCy ´ FCx ´ FB FAy FAx q

8.B B A FA→FA 42 A 9 A1 B Al B A 12 Ax3 A F FT A Ay3 3 TI

9. 8. C A A A B FA1 FA1 ´ FA2 FA2 ´ F BC A F A BC G A A C F C FA1 F B A B FA2 FAy3 FAx3 FT2 FT1 A FA1 ´ FA2 ´ FAy3 ´ FAx3 ´ F C F B

10 F D E E G A B B B F D E FE D D F C Ax

10. G B C D E A F D E F D F E B C F E ´ · O F B F C GC F FCy FCxC A FCy FCx F D ´ FAy FAx C F C ´ FCy ´ FCx ´ FCy FCx

作业:1-3、1-4

作业：1-3、1-4