图示体系不计阻尼的稳态最大动位移y(来学网)=4Pl/9EI,其最大动力弯矩为:
  • A.
    (来学网)7Pl/3
  • B.
    (来学网)4Pl/3
  • C.
    (来学网)Pl
  • D.
    (来学网)Pl/3