船舶与海洋工程结构力学课程思政教学实践——以弹性支座化简为例

针对船舶与海洋工程专业力学课程的思政教学案例设计与实践,在黑龙江省教育厅关于课程思政高质量建设实施方案的指导下,该文介绍哈尔滨工程大学船舶与海洋工程结构力学教学团队在课程思政教学中的建设思路与方法。以一次示范课程弹性支座化简为例,首先介绍“一依托、三根据、六结合”的课程思政元素挖掘与运用方法,然后以实际教学案例设计和实施过程,详细阐述了“导入—吸收—推广—内化”的四阶段教学过程,融合经典课程理论与时代思政案例,实现思政融入点与学生课堂情绪同频。最后,给出教学效果分析与教学反思,期待学习交流,提升专业知识教学与课程思政的协同育人水平。

工程结构力学

在工程设计中，结构力学的主题有很长的历史。工程结构包括杆、圆柱、支柱、管、梁、弹簧和框架。一般来说，在结构上施加的载荷有压缩、剪切、弯曲、扭转和压力，有单独的，也有组合的。结构的力学分析表明各种结构承担各自的荷载，在一个可预测的安全情况下，这种分析在选择、设计材料及其物理形状时是必要的。

含无限刚性体结构的静力学特征与工程实践

结构分析中为了简化计算,常假定结构的某一部分或者是构件沿某个方向是无限刚性体.目前不少结构力学教材或是相关论文中,对于含无限刚性体结构的静力学特征常阐述不清楚,有的甚至存在概念性错误.本文分析了一些典型的问题,并提出了内力确定性方面的判定原则和在工程实践中的处理方法.

定性结构力学在高职教育教学中的研究与实践

高等职业教育的课程要以工作过程为导向。结合高职学生的应用要求及所具备的工程实践能力,指出定性分析在实际工程中的重要性,并因材施教地尝试定性结构力学的教育教学实践,训练学生定性分析问题的能力,掌握正确的学习方法,提高教与学的效率。为生产一线管理所具备的发现问题、解决问题的能力奠定基础。

结构频率误差修正参数的最优选取问题

利用摄动理论和广义逆理论，研究了结构固有频率随机误差的修正及修改参数的选取问题，提出了理想修改参数、最优修改参数和最优修改参数组的概念，讨论了如何选取修改参数才能使结构修改后频率误差均方值的数学期望最小，并得到了该最小值的表达式，数值例子说明了方法的实用性和有效性。

中南林业科技大学土木工程学院

中南林业科技大学土木工程学院经过20多年的发展，现有林区道路与结构工程二级学科博士点，土术工程一级学科硕士点（涵盖岩土工程、结构工程、市政工程、防灾减灾及防护工程、桥梁与隧道工程、土木工程管理、工程结构力学、工程流变学等二级学科硕士点），土木工程为湖南省重点学科；力学实验室为湖南省示范实验教学中心。土木工程专业是湖南省和国家教育主管部门“十二五”综合改革试点专业。

求解具有奇异性的桁架拓扑优化的遗传算法

采用遗传算法求解具有奇异最优解现象的桁架结构拓扑优化问题。在桁架结构拓扑优化的内力约束ε-放松列式基础上,根据遗传算法特点通过引入拓扑变量提出一种新的优化模型列式。在遗传算法中改进了适应度函数及约束处理方法、选择和交叉操作等,提高了求解算法的效率和可靠性。数值算例以及两种列式的对比分析表明,本文改进的遗传算法和新提出的优化模型列式,能够得到拓扑优化问题的全局最优解。

静力模型修正的逆特征值方法

本文利用这特征值理论，提出了一种参数型静力模型修正方法．根据特征方程，建立起关于设计参数的非线性方程组，把模型修正问题转化为用Ｎｅｗｔｏｎ法求解非线性方程组的问题．本文给出的数值求解方法具有精度高、收敛性好、计算过程简洁的特点，数值仿真结果表明了该方法有很好的效果．

崔维成 “蛟龙”号载人潜水器第一副总设计师

崔维成博士是国内外船舶力学界知名的专家、学者,优秀的归国人员,他在英国完成博士后研究工作后,毅然放弃国外的优厚待遇和工作条件,携妻回国。他长期从事船舶与海洋工程结构力学研究,在完整和破损船体结构的极限强度预报、船舶结构的疲劳强度评估以及可靠性分析与设计等领域做出了创造性的贡献,现为国家科技部863计划重大专项——深海载人潜水器的第一副总设计师。

Market based framework for multiple AUVs cooperation

A“Market” based framework for multiple AUVs team is introduced in this paper.It is a distributed meta-level task allocation framwork. The formulation and the basic concepts of the “Market” such as “goods” and “price” are discussed first, then the basic algorithm of the “auction”. The loosely coupled v-MDTSP tasks are considered as an example of the task allocation mission. A multiple AUV team controller and a detailed algorithm are developed for such applications. The simulation results show that the controller has the advantages such as robustness and low complexity and it can achieve better optimization results than the classical central controller (such as GA) in some tasks. And the comparison of two different local solvers also implies that we should get the reasonable task allocation even not using the high quality algorithm, which can considerably decrease the cooperation computation.

Ship motion extreme short time prediction of ship pitch based on diagonal recurrent neural network

A DRNN (diagonal recurrent neural network) and its RPE (recurrent prediction error) learning algorithm are proposed in this paper .Using of the simple structure of DRNN can reduce the capacity of calculation. The principle of RPE learning algorithm is to adjust weights along the direction of Gauss-Newton. Meanwhile, it is unnecessary to calculate the second local derivative and the inverse matrixes, whose unbiasedness is proved. With application to the extremely short time prediction of large ship pitch, satisfactory results are obtained. Prediction effect of this algorithm is compared with that of auto-regression and periodical diagram method, and comparison results show that the proposed algorithm is feasible.

Structural safety monitoring for Nanjing Yangtze River Bridge

In order to evaluate objectively and accurately the integrity, safety and operating conditions in real time for the Nanjing Yangtze River Bridge, a large structural safety monitoring system was described. The monitoring system is composed of three parts: sensor system, signal sampling and processing system, and safety monitoring and assessment system. Combining theoretical analysis with measured data analysis, main monitoring contents and layout of measuring points were determined. The vibration response monitoring was significantly investigated. The main contents of safety monitoring on vibration response monitoring are vibration of the main body of the Nanjing Yangtze river bridge, collision avoidance of the bridge piers, vibration of girders on high piers for the bridge approach and earthquake. As a field laboratory, the safety monitorying system also provides information to investigate the unknown and indeterminate problems on bridge structures and specific environment around bridges.

Interface energetics and engineering of organic heterostructures in organic photovoltaic cells

The reliable information about interface energetics of organic materials, especially the energy level alignment at organic heterostructures is of pronounced importance for unraveling the photon harvesting and charge separation process in organic photovoltaic(OPV) cells. This article provides an overview of interface energetics at typical planar and mixed donor-acceptor heterostructures, perovskite/organic hybrid interfaces, and their contact interfaces with charge collection layers. The substrate effect on energy level offsets at organic heterostructures and the processes that control and limit the OPV operation are presented. Recent efforts on interface engineering with electrical doping are also discussed.

Nonlinear waves and wave-structure interactions in marine hydrodynamics——Recent progress

We briefly review the recent progress in marine hydrodynamics.Developments in wave-structure interaction,wave-current interaction,Rogue waves,sloshing in liquid tanks and their applications in ocean engineering,such as Floating Production Storage and Offloading facility(FPSO) and Very Large Floating Structure(VLFS),are presented.