<img src、"http://hebei.ouchn.cn/pluginfile.php/61595/question/answer/585512/2/247433/image003.png" alt="" width="19" height="24">
<img src、"http://hebei.ouchn.cn/pluginfile.php/61595/question/answer/585512/2/247434/image004.png" alt="" width="21" height="25">
、第i个附加约束中的约束反力
、第j个附加约束中的约束反力