为什么改变吊杆长度，频率和内力计算结果都没有变
在这个结构中存在一些吊杆，可以看着单摆那种结构，但我改变吊杆长度之后，经模态计算和反应谱计算发现频率和内力都没改变，请问谁知道这是什么原因啊？<br><br>et,7,39 <br>keyopt,7,4,0<br>keyopt,7,3,1<br>keyopt,7,6,1<br>et,8,39 <br>keyopt,8,4,0<br>keyopt,8,3,2<br>keyopt,8,6,1<br>et,9,39 <br>keyopt,9,4,0<br>keyopt,9,3,3<br>keyopt,9,6,1type,7<br>real,24<br>e,553,727<br>e,554,728<br>e,554,729<br>e,555,730<br>e,555,731<br>e,556,732<br>e,556,733<br>e,557,734<br>e,557,735<br>e,558,736<br>e,558,737<br>e,559,738<br>real,25<br>e,564,739<br>e,565,740<br>e,565,741<br>e,566,742<br>e,566,743<br>e,567,744<br>e,567,745<br>e,568,746<br>e,568,747<br>e,569,748<br>e,569,749<br>e,570,750<br><br><br>type,8<br>real,24<br>e,553,727<br>e,554,728<br>e,554,729<br>e,555,730<br>e,555,731<br>e,556,732<br>e,556,733<br>e,557,734<br>e,557,735<br>e,558,736<br>e,558,737<br>e,559,738<br>real,25<br>e,564,739<br>e,565,740<br>e,565,741<br>e,566,742<br>e,566,743<br>e,567,744<br>e,567,745<br>e,568,746<br>e,568,747<br>e,569,748<br>e,569,749<br>e,570,750<br><br>type,9<br>real,23<br>e,553,727<br>e,554,728<br>e,554,729<br>e,555,730<br>e,555,731<br>e,556,732<br>e,556,733<br>e,557,734<br>e,557,735<br>e,558,736<br>e,558,737<br>e,559,738<br><br>e,564,739<br>e,565,740<br>e,565,741<br>e,566,742<br>e,566,743<br>e,567,744<br>e,567,745<br>e,568,746<br>e,568,747<br>e,569,748<br>e,569,749<br>e,570,750<br>页:
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