• 2022-05-29
    ‌无阻尼单自由度振动系统由质量为M的质量块和弹性系数为D的弹簧组成,已知质量块的振动位移函数为[img=166x25]18032665efefc4b.png[/img],则振动系统的总机械能为( )。​‌​
    A: [img=36x22]18032665f8783c3.png[/img]
    B: [img=47x43]18032666007d4ac.png[/img]
    C: [img=47x43]180326660936542.png[/img]
    D: [img=47x43]1803266611709e9.png[/img]
  • B
    本题目来自[网课答案]本页地址:https://www.wkda.cn/ask/tommtzjteoxozoo.html

    内容

    • 0

      密度为[img=91x26]180322aaf279a56.png[/img]的上半球面[img=130x30]180322aafbb65b5.png[/img]绕[img=9x14]180322ab04e3531.png[/img]轴的转动惯量等于 A: [img=47x43]180322ab0d6925c.png[/img] B: [img=47x43]180322ab1688bfc.png[/img] C: [img=47x43]180322ab1f97da6.png[/img] D: [img=27x22]180322ab28311c5.png[/img] E: [img=47x43]180322ab30d8c00.png[/img] F: [img=47x43]180322ab39ff667.png[/img] G: [img=47x43]180322ab42bb9a8.png[/img] H: [img=27x22]180322ab4b7def9.png[/img] I: [img=38x43]180322ab54c6229.png[/img] J: [img=38x43]180322ab5d37ad7.png[/img]

    • 1

      密度为[img=91x26]1803857545dd5ab.png[/img]的上半球面[img=130x30]180385754f02af8.png[/img]绕[img=9x14]180385755750120.png[/img]轴的转动惯量等于 A: [img=47x43]180385755f457db.png[/img] B: [img=47x43]18038575678db5d.png[/img] C: [img=47x43]180385756feccaa.png[/img] D: [img=27x22]180385757852fb3.png[/img] E: [img=47x43]1803857581e880b.png[/img] F: [img=47x43]180385758a828f7.png[/img] G: [img=47x43]180385759328bc0.png[/img] H: [img=27x22]180385759b022cc.png[/img] I: [img=38x43]18038575a36b53d.png[/img] J: [img=38x43]18038575ab65640.png[/img]

    • 2

      密度为[img=91x26]18030f9c67c11eb.png[/img]的上半球面[img=130x30]18030f9c6ff81a9.png[/img]绕[img=9x14]18030f9c78a6312.png[/img]轴的转动惯量等于 A: [img=47x43]18030f9c805985e.png[/img] B: [img=47x43]18030f9c8833e92.png[/img] C: [img=47x43]18030f9c90a187d.png[/img] D: [img=27x22]18030f9c9863c68.png[/img] E: [img=47x43]18030f9ca071250.png[/img] F: [img=47x43]18030f9ca895a7e.png[/img] G: [img=47x43]18030f9cb1daa08.png[/img] H: [img=27x22]18030f9cba420e9.png[/img] I: [img=38x43]18030f9cc36905c.png[/img] J: [img=38x43]18030f9ccbbf8f8.png[/img]

    • 3

      设[img=12x19]1803856aa9af9ce.png[/img]为上半球面[img=138x30]1803856ab1fa3f4.png[/img]的上侧,则曲面积分[img=398x48]1803856abe77d32.png[/img]的值为 A: [img=31x43]1803856ac6cbd08.png[/img] B: [img=31x43]1803856ad03c4bd.png[/img] C: [img=31x43]1803856ad942732.png[/img] D: [img=31x43]1803856ae251452.png[/img] E: [img=47x43]1803856aeb125be.png[/img] F: [img=47x43]1803856af444daf.png[/img] G: [img=47x43]1803856afcf723f.png[/img] H: [img=47x43]1803856b0501309.png[/img]

    • 4

      设[img=12x19]18030f8e80b5719.png[/img]为上半球面[img=138x30]18030f8e8855aa6.png[/img]的上侧,则曲面积分[img=398x48]18030f8e932e470.png[/img]的值为 A: [img=31x43]18030f8e9b6867d.png[/img] B: [img=31x43]18030f8ea3ea72d.png[/img] C: [img=31x43]18030f8eac8d76a.png[/img] D: [img=31x43]18030f8eb543dd2.png[/img] E: [img=47x43]18030f8ebd63a02.png[/img] F: [img=47x43]18030f8ec593d61.png[/img] G: [img=47x43]18030f8ece1af76.png[/img] H: [img=47x43]18030f8ed65cd5d.png[/img]