一图示自由弹性杆件,L=10m,A=0.1m2,γ=25kN/m3,c=4000m/s,一小锤纵向敲击右端,敲击的力脉冲(宽度为1ms)幅值为1kN,请给出图中A、B、C点在2L/c时间段内的速度波形(标明坐标及幅值)
正确答案:![](https://www.274949.com/images/2020-03/27/b2g1g09d.jpg)
![](https://www.274949.com/images/2020-03/27/b2g1g09d.jpg)
答案解析:有
![](/editor/images/201705/qrcode_for_gh_573e2a458573_258.jpg)
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一图示自由弹性杆件,L=10m,A=0.1m2,γ=25kN/m3,c=4000m/s,一小锤纵向敲击右端,敲击的力脉冲(宽度为1ms)幅值为1kN,请给出图中A、B、C点在2L/c时间段内的速度波形(标明坐标及幅值)
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