《结构力学习题集》(下)-结构的动力计算习题及答案

8ml/2)?24.25s-1,??1/(1??2/?2)?3.127,25、 MDmax??Mstp,YMax??Ystp?1.3029cmР .s?1 ??1/(1??2/?2)?1.52226、??/m?/m(4/3EI?1/4k)?3416Р 27、 YDmax??ystp?0.006m, , MDmax??Mstp?7.61kN m,Р P?Dcos(?t),m?2Р Yst?P/m?2, ?D?1.04067,Y?Asin(?t)?Bcos(?t)? A?Y?stD?, B?l/1000,?Р Y?0.001lcos(?t)?0.20833Ystsin(?t)?1.04167Ystsin(?t),Р 27EI/(ml3) 28、??Р 29、?Р 30、??38.92s-1 ,??15.71s-1 ,??1.19 ,ymax?2.09/103m ?52.36s-1, ??1.378, ,yst?1.9610?4m, A??yst?0.27mmР MD??FM?2.756MР 31、??71.50s-1, ??62.83s-1,;??4.389 ;A??F??3.37mm;Р ymax?(w??F)??5.28mmР -132、??57.596s, ??1.496 ,MD??FM?7.48M ,Р —— 30 ——Р 《结构力学》习题集(下册)Р Mmax?Mst?MD??15.48 0.52?M TР 33、??3EI3EI, , k?ml3l3Р 5P 16m 运动方程: m???ky?k??1P ,????2y?yyР 特征解y: *Р y*?Р 5P0 16m?21?21?2?sin? t?0.0595P0sin? tm MA?m??*l?yPlPl?(0.0595P0l?0)sin? t?0.56P0lsin? t ,?MA?max?0.56P0l 22