若忽略杆件的轴向变形,图示体系的动力自由度数为()。https://assets.asklib.com/psource/2015110415350962994.png
图示体系略去杆件轴向变形,动力计算时体系自由度数为()https://assets.asklib.com/images/image2/2017040815472093283.png
图示体系的自振频率(不计竖杆自重)为:()https://assets.asklib.com/psource/201510281447035794.jpg
图示体系,质点的运动方程为:()https://assets.asklib.com/psource/201510281441317284.jpg
图示体系,质点的运动方程为:() https://assets.asklib.com/psource/2016071810063590056.jpg https://assets.asklib.com/psource/2016071810064376152.jpg
设直杆的轴向变形不计,图示体系的动力自由度数为:()https://assets.asklib.com/psource/2015102814381863895.jpg
图示体系为()。https://assets.asklib.com/psource/2015110415281210288.png
图示振动体系的自由度数目为()。https://assets.asklib.com/images/image2/2018072216550867529.jpg
不计阻尼,不计杆重时,图示体系的自振频率为:()https://assets.asklib.com/psource/2015102814434614766.jpg
图示体系为几何不变体系,且其多余联系数目为:()https://assets.asklib.com/psource/2015102815000754588.jpg
图示体系中,几何不变无多余约束的体系为()。
图示体系为几何不变体系,且其多余联系数目为:()https://assets.asklib.com/psource/2016071810402444763.jpg
图示体系,设弹簧刚度系数k=2EI/l 3 ,则体系的自振频率为:() https://assets.asklib.com/psource/201510281445596099.jpg
若忽略杆件的轴向变形,图示体系的动力自由度数为()。https://assets.asklib.com/psource/2016071810345024980.jpg
图示三种单自由度动力体系自振周期的关系为:()https://assets.asklib.com/psource/2016071810134077438.jpg
图示体系为几何不变体系,且其多余联系数目为:()https://assets.asklib.com/psource/2015110415402275577.png
忽略直杆轴向变形的影响,图示体系有振动自由度为()。https://assets.asklib.com/images/image2/2018072216583558257.jpg
设θ=0.5w(ω为自振频率),则图示体系的最大动位移为:()https://assets.asklib.com/psource/2015102814450994626.jpg
设直杆的轴向变形不计,图示体系的动力自由度数为:()https://assets.asklib.com/psource/2015102814375026779.jpg
图示单自由度动力体系自振周期的关系为()https://assets.asklib.com/images/image2/2018072309391228086.jpg
设直杆的轴向变形不计,图示体系的动力自由度数为:()https://assets.asklib.com/psource/2015102814400277632.jpg
图示体系为()。<img src='https://img2.soutiyun.com/shangxueba/ask/2022-04/15/915/20220415152954904.png' />
图示体系为() 。<img src='https://img2.soutiyun.com/shangxueba/ask/2021-10/30/254/20211030142100599.png' />
图示体系为()。<img src="https://img2.soutiyun.com/shangxueba/askkp/2022-05/31/1420/20220531162116620.png" alt=""/>