《机械设计》教学中若干问题解释
Explanation for Several Problems in the Teaching of “Mechanical Design”

西北工业大学濮良贵教授主编、高等教育出版社出版的《机械设计》是一本机械设计领域的经典教材，自出版以来，在很多高校的机械工程相关专业中广泛使用，深受好评和欢迎。本文捡取了该教材中我们认为或论述有问题、或解释不够简明、或没有展开深入解释、或表达有错误的若干问题，从数学角度给予了详细的解释或证明。这些问题是我们在教学实践中感到青年教师和学生理解比较困难、困惑比较多的问题，搞清楚这些问题的理论基础，有利于加深理解教材、提高教学质量。
“Mechanical Design”, edited by Professor Pu Lianggui from Northwestern Polytechnical University and published by Higher Education Press, is a classic textbook in the field of mechanical design. Since its publication, it has been widely used in mechanical engineering related majors in many universities and has received high praise and popularity. This article selects several issues from the textbook that we believe have problems with the discussion, lack concise and clear explanations, have not been elaborated and explained in depth, or have errors in expression, and provides detailed explanations or proofs from a mathematical perspective. These issues are difficult and confusing for young teachers and students to understand in our teaching practice. Clarifying the theoretical basis of these issues is beneficial for deepening understanding of textbooks and improving teaching quality.