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第5章 常用力学公式
5.1 理论力学基本公式
5.1.1 静力学基本公式
表1-5-1 平面汇交力系、平面任意力系和空间力系的合成、简化及平衡条件
![](https://epubservercos.yuewen.com/F3E36B/16499763104627206/epubprivate/OEBPS/Images/image000387.jpg?sign=1738776342-6h5w8n05J0PBhmBZPmTfrhKSo3rDtyq6-0-868fc0f48f2c9bcf17c85f12d395ba4d)
![](https://epubservercos.yuewen.com/F3E36B/16499763104627206/epubprivate/OEBPS/Images/image000399.jpg?sign=1738776342-9RCSi9BeoXwIicmLmVqp4ZHZld5WYA1G-0-75e4915c49997c9ca631a8871c525e2d)
表1-5-2 力矩及力偶矩的计算
![](https://epubservercos.yuewen.com/F3E36B/16499763104627206/epubprivate/OEBPS/Images/image000405.jpg?sign=1738776342-ZSVssikN1hD0gwBdhUZNQ4misjJxbegl-0-04fdfc178225ece5655c2072a50df76c)
5.1.2 运动学基本公式
表1-5-3 运动学基本公式
![](https://epubservercos.yuewen.com/F3E36B/16499763104627206/epubprivate/OEBPS/Images/image000411.jpg?sign=1738776342-k4aofRcn7h8Czo7nZhIJN2h29dD32UEc-0-48f72803e0fa5b440ac12acd1afa6944)
![](https://epubservercos.yuewen.com/F3E36B/16499763104627206/epubprivate/OEBPS/Images/image000417.jpg?sign=1738776342-cD0VWarB3MT5ao0Ev4T7enVitCtryt3k-0-a9769e98b55d3e3835f2b5d5887523bc)
表1-5-4 刚体运动的常用计算式
![](https://epubservercos.yuewen.com/F3E36B/16499763104627206/epubprivate/OEBPS/Images/image000423.jpg?sign=1738776342-vh8yeamp7oX5sMUnDPIps96VnU0jn6A6-0-11a8d784ba6bbd01d2b48af5d0ca47aa)
5.1.3 动力学基本公式
表1-5-5 动力学基本公式
![](https://epubservercos.yuewen.com/F3E36B/16499763104627206/epubprivate/OEBPS/Images/image000429.jpg?sign=1738776342-eU1oowwgGwaZAPxi11LI3CJxxZvCKNwn-0-270c30eb0f7f1e62fa53db7bc8623836)
5.1.4 常用转动惯量公式
(1)机械传动中转动惯量的换算(表1-5-6)
表1-5-6 机械传动中转动惯量的换算
![](https://epubservercos.yuewen.com/F3E36B/16499763104627206/epubprivate/OEBPS/Images/image000435.jpg?sign=1738776342-QEHr2ICrWeutkfc2lmMBqLJZuwixkMGY-0-c1fe37d071ba523844feb53f5e6d5e39)
(2)一般物体旋转时的转动惯量(表1-5-7)
表1-5-7 一般物体旋转时的转动惯量
![](https://epubservercos.yuewen.com/F3E36B/16499763104627206/epubprivate/OEBPS/Images/image000441.jpg?sign=1738776342-naaAyX6969AGtDbtMJZbxKYmztaP7aNB-0-6639c70eaaa879fd581b3b957bbf36a5)
![](https://epubservercos.yuewen.com/F3E36B/16499763104627206/epubprivate/OEBPS/Images/image000447.jpg?sign=1738776342-WFWYxu28BM3F15heWdEZOcxgvqAjaDHE-0-cf5ea013932700736655d3fa672d912c)
![](https://epubservercos.yuewen.com/F3E36B/16499763104627206/epubprivate/OEBPS/Images/image000453.jpg?sign=1738776342-WhO6KtC3891DWFgur80qwgT4vzIpcl4S-0-dfc726b4775e330dfbcdd49e4d90e3ef)
![](https://epubservercos.yuewen.com/F3E36B/16499763104627206/epubprivate/OEBPS/Images/image000465.jpg?sign=1738776342-xa6g7RFaA0ykVrakk0PdlsBhzcIh8Yjj-0-51c38785562b060c3c2e25158ebb8b46)
![](https://epubservercos.yuewen.com/F3E36B/16499763104627206/epubprivate/OEBPS/Images/image000471.jpg?sign=1738776342-CsqF9oFqk5inaYnfJL3HU1dLHC3vtnf4-0-2fc1cd5792bc544010e91b00610a209b)
![](https://epubservercos.yuewen.com/F3E36B/16499763104627206/epubprivate/OEBPS/Images/image000477.jpg?sign=1738776342-YpYZJKQ9QDERD8PG4v9XiZ7CsqCwMRNa-0-f4943bd82f8e3a55042166f5df54ab0e)
(3)常用旋转体的转动惯量(表1-5-8)
表1-5-8 常用旋转体的转动惯量
![](https://epubservercos.yuewen.com/F3E36B/16499763104627206/epubprivate/OEBPS/Images/image000483.jpg?sign=1738776342-nT7J5pDNRT8tyqpGQqJXSB7xDJ0fp56w-0-4af7fd9d0cf17b6fab1d00d8b019e8f8)
注:表中部分零件只给出主要尺寸,计算出的转动惯量是近似的。