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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=1739249687-J0GMEkLASBp5hEBYqtEr3WwURqAFAlZF-0-63a824e2f6b64793c0a4b7c2cebc6158)
![](https://epubservercos.yuewen.com/F3E36B/16499763104627206/epubprivate/OEBPS/Images/image000399.jpg?sign=1739249687-kMWhVOe1DlqZwEIYCgCsm7lszOZX3aFW-0-718214a0a9c359bc3f6996e149e8697f)
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=1739249687-fjvuaD9KCsAnYcdoulhaq9QmAJFLCS6q-0-b85ed14d3a03acfe371688b579353c92)
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=1739249687-tDN4fRCkeI4tP3htah53ZOS9MpyE4hgG-0-29360cee3d356b85b0297e359e1de4a4)
![](https://epubservercos.yuewen.com/F3E36B/16499763104627206/epubprivate/OEBPS/Images/image000417.jpg?sign=1739249687-F019wI9Bwt2mU91CLxr3WmEUKFD9AbX9-0-42d9e6ff8346a2ce6d2929d7f711ec0e)
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=1739249687-BKSHFlPLu5UfGzHfHMVYmvtnvCxh57gg-0-9db59cf5aba2b5eb86c0d8a479dd78de)
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=1739249687-nXhcbPhygNcsOJMZOvII7zNX9hdIAi3P-0-ec9ec848fc2c2ecb334677d405d72653)
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=1739249687-shsr5GTIN8rqNHWJVDhYdGY1Df3VOgYA-0-8f878c853fa5eba515e641b620a533d3)
(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=1739249687-QDr7Ey6eazcsGXlwsF6hNeYNL15oDgfU-0-db69b3606bf975a13f6f54362aa608e8)
![](https://epubservercos.yuewen.com/F3E36B/16499763104627206/epubprivate/OEBPS/Images/image000447.jpg?sign=1739249687-tsGkNEOLHvyPFCCPcxRs4LuVxvnrL1q5-0-3eaf9408575748f28457a825150da674)
![](https://epubservercos.yuewen.com/F3E36B/16499763104627206/epubprivate/OEBPS/Images/image000453.jpg?sign=1739249687-ILpD7KPAZLH5bWExJwG1wqRhJkhXzUkN-0-7dd2530bc47dfe987ba963027530af3d)
![](https://epubservercos.yuewen.com/F3E36B/16499763104627206/epubprivate/OEBPS/Images/image000465.jpg?sign=1739249687-4QVHPKHQBixkBQaBxo8mxIPNfRuuxgAP-0-bded92bfc09c7d40111c2b4b23dd04bb)
![](https://epubservercos.yuewen.com/F3E36B/16499763104627206/epubprivate/OEBPS/Images/image000471.jpg?sign=1739249687-aScw9FAdUNCp5n908hlPUcMcgWmg46Pk-0-22bcc1da15655259aedf35f5ec1ce89f)
![](https://epubservercos.yuewen.com/F3E36B/16499763104627206/epubprivate/OEBPS/Images/image000477.jpg?sign=1739249687-Pw9V4u8b30Mcawl9GFANwFaRlUAowuQx-0-9f2421fbf7c4c759c56f54e05f5ae4fa)
(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=1739249687-KLkEo061fmGv33F6YHXgFxoJINBxtnbz-0-1ac1cb69bf597d4e3c67e9fc07bdef92)
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。