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工程力学(李福宝)
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《工程力学》遵循“有用则精学、不用则先不学...
《工程力学》遵循“有用则精学、不用则先不学”的原则,不追求博大精深的理论阐述,也非面向其他专业的大平台教材,而是过程装备与控制相关专业新工科教材。本书将在本专业领域应用不多的理论部分进行精简,突出工程应用技术,以生产实践和技术应用案例为载体,把必要的理论和专业知识呈现给学生。 《工程力学》共分11章,主要内容包括标量与矢量、力与力偶、静力学、运动学、动力学、机械振动、应力状态与强度理论、拉伸和压缩 剪切和挤压、弯曲、扭转、组合变形,在每章的末尾,都有对应的大量工程实践例题,以利于学生理解专业的知识及其应用。 《工程力学》可作为过程装备与控制工程、油气储运工程、环保设备工程、物流工程等专业的教材,也可供相关专业工程技术人员参考。
李福宝:沈阳工业大学化工装备学院教授,毕业于东北大学流体机械及工程专业,工学博士学位。主要从事压力容器及化工设备、流体机械及工程、撞击流等领域的教学和科研工作。主讲过本科生工程力学、工程流体力学、过程设备设计;研究生流体力学等课程。 专著《几何量传感及技术测量》由冶金工业出版社出版。主编《压力容器及过程设备设计》等4部规划教材,分别由化学工业出版社、冶金工业出版社出版。在国内外科技期刊及国际会议公开发表论文30余篇,多被SCI、EI、ISTP检索。获授权发明专利4项,实用新型1项。
第1章 标量与矢量2 1.1标量与矢量概述2 1.1.1定义2 1.1.2矢量运算2 1.1.3三维正交矢量3 1.1.4矢量的点积4 1.1.5矢量的叉积5 1.1.6矢量的微积分6 1.2梯度7 1.3散度7 1.4旋度8 工程实践例题与简解8 思考题14 第2章 力与力偶15 2.1力的概念及性质15 2.2刚体受力分析16 2.3力矩和力偶18 工程实践例题与简解20 思考题30 第3章 静力学32 3.1平面力系问题32 3.2空间力系问题34 工程实践例题与简解36 思考题50 第4章 运动学52 4.1点的运动52 4.2刚体的运动56 工程实践例题与简解59 思考题72 第5章 动力学73 5.1动力学基本定律73 5.2质点运动微分基本方程73 5.3惯性力74 5.4平面图形的几何问题75 5.5动力学定理78 5.6功率88 工程实践例题与简解89 思考题100 第6章 机械振动102 6.1简谐振动102 6.2无阻尼受迫振动106 6.3有阻尼振动107 6.4有阻尼受迫振动109 6.5共振110 6.6振动合成112 工程实践例题与简解113 思考题129 第7章 应力状态与强度理论131 7.1应力与应变131 7.1.1应力131 7.1.2应变132 7.2应力状态132 7.2.1单元体133 7.2.2主应力134 7.2.3平面应力状态134 7.2.4三向应力圆137 7.3广义胡克定律138 7.4金属材料力学性能138 7.4.1低碳钢拉伸试验138 7.4.2强度指标140 7.4.3许用应力140 7.4.4弹性与塑性143 7.5强度理论144 工程实践例题与简解145 思考题154 第8章 拉伸和压缩剪切和挤压156 8.1拉伸和压缩156 8.1.1内力156 8.1.2应变与应力156 8.1.3胡克定律158 8.1.4强度计算158 8.2剪切与挤压159 8.2.1剪切159 8.2.2挤压160 工程实践例题与简解162 思考题176 第9章 弯曲177 9.1外力分析177 9.2内力分析178 9.3弯曲应力181 9.4挠度186 9.5提高梁的强度和刚度的措施188 9.6圆环的挠曲线微分方程189 工程实践例题与简解192 思考题206 第10章 扭转207 10.1外力偶矩207 10.2薄壁筒扭转208 10.2.1扭矩208 10.2.2应力209 10.2.3应变210 10.2.4物理方程210 10.3圆轴扭转210 10.3.1扭矩211 10.3.2几何方程211 10.3.3物理方程212 10.3.4静力学方程212 10.4圆轴扭转强度条件213 10.5圆轴扭转刚度条件213 工程实践例题与简解214 思考题230 第11章 组合变形231 11.1拉伸与弯曲组合231 11.2弯曲与扭转组合233 工程实践例题与简解235 思考题248 参考文献249
随着国民经济发展的不断深入,我国的产业结构发生了革新式的变化,支撑产业革新的新知识、新技术也随之发生新的调整和升级。因此,培养新知识结构人才必然要求创新,“新时代,新工科,新人才”应时而生。为了适应新型人才培养需要,我们组织编写了本书。 本书具有以下特点: 1.以石油化工行业为背景,强调理论和实践双翼齐飞的原则,用基础理论解决生产实际问题。因此,在“工程实践例题与简解”的编写中以石油化工装备为对象,在解题中要让学生了解该设备是什么、用在哪、什么结构、什么原理、我们用该知识能解决什么问题,避免空谈理论,使学生不知道它用在哪、怎么用,这就是我们提出的“教学要落地”。 2.与实践紧密结合。坚持“把课桌搬到车间里、把黑板挂在设备上、把论文写在产品中”的原则,与生产实践紧密联系,做到有的放矢的“教与学”。 3.坚持“四个面向”。即充分考虑培养的学生到什么企业工作、在什么岗位、在这个岗位干什么、这个岗位需要什么样的知识结构,并以此知识为核心建立教学体系。 4.根据“新时代,新工科,新人才”的需求改变课程体系。坚持“精准教学”,即充分考虑哪些课要上、哪些课要调整、哪些内容是重点,以符合“新工科”人才的培养目标。 5.坚持“用则精学”的原则。就业岗位技术技能需要的知识,坚持“精讲”“精学”“精用”,使学生集中精力学好、用好。对于在专业体系中用得少的或用不到的知识先不学,以后用到再学,从而把有限的时间,集中在学生真正需要掌握的知识上,做到学懂弄通。 本书由沈阳工业大学李福宝教授、周丽楠讲师、李勤教授主编,全书共11章,其中第6、7章由李福宝编写,第8章由李秀菊编写,第2章由江远鹏编写,第1、4、9章由周丽楠编写,第5章由李勤编写,第10章由刘岩岩编写,第3章由临沂大学机械与车辆工程学院院长孙成通教授编写,第11章由中海油惠州石化总经理、沈阳工业大学硕士生导师、教授级高级工程师赵岩编写,全书由李福宝教授统稿。 在本书编写过程中,得到了中海油惠州石化公司及临沂大学机械与车辆工程学院相关领导和同事的大力支持,同时沈阳工业大学的许增金、徐飞、霍英妲、刘一达、王志宇、金垚、赵一峰、王春晓、孙嘉馨等老师和研究生也做出了贡献,在此一并表示衷心的感谢。 由于水平所限,书中难免疏漏和不足之处,呈请读者批评指正。 编者 2018年12月
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