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高速道岔钢轨打磨廓形及磨耗规律试验研究

铁道建筑 2024年第8期64卷 1-6页

作者：马思远王树国杨东升王璞中国铁道科学研究院研究生部北京100081 中国铁道科学研究院集团有限公司铁道建筑研究所北京100081

针对多条线路上车站内18号高速道岔进行系统的现场试验,研究其目标打磨廓形的实际情况和道岔区钢轨磨耗演变规律。结果表明:目前全路道岔区基本上还是以60 kg/m钢轨轨头廓形作为目标打磨廓形。顺向过岔时直尖轨的垂向磨耗整体较曲尖轨... 详细信息

针对多条线路上车站内18号高速道岔进行系统的现场试验,研究其目标打磨廓形的实际情况和道岔区钢轨磨耗演变规律。结果表明:目前全路道岔区基本上还是以60 kg/m钢轨轨头廓形作为目标打磨廓形。顺向过岔时直尖轨的垂向磨耗整体较曲尖轨更严重,曲尖轨的侧向磨耗明显大于直尖轨;逆向过岔时直尖轨、曲尖轨的垂向磨耗基本上和顺向过岔时规律相同,径向磨耗整体大于顺向过岔时的,应重点关注。顺向、逆向过岔时,长心轨的垂向磨耗不断增大,最终趋于稳定,叉跟尖轨的垂向磨耗和侧向磨耗均是在开始承载位置处磨耗量值最大。顺向过岔时长心轨径向磨耗在顶宽40 mm之后均处于相对较大值,叉跟尖轨径向磨耗峰值主要出现在顶宽20 mm处;逆向过岔时长心轨径向磨耗峰值主要出现在顶宽71 mm处,叉跟尖轨径向磨耗峰值出现位置和顺向过岔时相同。

关键词：高速铁路道岔现场试验打磨廓形钢轨磨耗

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乙烯装置智能化电气安全管控系统应用分析

电气应用 2024年第9期43卷 50-55页

作者：王树国中国石化工程建设有限公司

传统电气操作对于乙烯装置生产过程的稳定性、安全性、质量和效率都起着至关重要的作用，但同时也面临技术和安全的挑战。从应用场景、应用原理和关键技术等方面进行了深入的探究分析，结合人工智能技术，开发并应用了新一代智能化乙烯... 详细信息

传统电气操作对于乙烯装置生产过程的稳定性、安全性、质量和效率都起着至关重要的作用，但同时也面临技术和安全的挑战。从应用场景、应用原理和关键技术等方面进行了深入的探究分析，结合人工智能技术，开发并应用了新一代智能化乙烯装置安全管控系统。通过对电气设备进行智能化改造和数据采集，将其与先进的控制系统连接起来，基于自动化的现代控制系统，实现电气安全管控的一键顺控操作，大幅提高了乙烯装置的生产自动化水平，减少了人为操作错误和事故的风险，提升了生产过程的安全性和稳定性。

关键词：防误技术乙烯电气操作一键顺控

铁路交通荷载作用下的土体移动多源黏弹性边界

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振动与冲击 2024年第14期43卷 142-147页

作者：张茉颜肖宏王树国杜香刚王阳中国铁道科学研究院集团有限公司铁道建筑研究所北京100081 中国铁道科学研究院集团有限公司高速铁路轨道系统全国重点实验室北京100081 北京交通大学土木建筑工程学院北京100044

黏弹性边界由于可以有效地消除土体边界反射、易与有限元结合等优点,成为结构-土体动力相互作用分析中常用的人工边界。黏弹性边界是基于单源和固体源提出的,然而交通荷载作用下轨枕、路基和桥墩等铁路基础设施振动引发的环境振动属于... 详细信息

黏弹性边界由于可以有效地消除土体边界反射、易与有限元结合等优点,成为结构-土体动力相互作用分析中常用的人工边界。黏弹性边界是基于单源和固体源提出的,然而交通荷载作用下轨枕、路基和桥墩等铁路基础设施振动引发的环境振动属于多源和移动源问题,采用现有的黏弹性边界会产生一定的误差。该研究基于多源及移动源的特点,利用波动方程对既有的黏弹性边界进行修正,提出了移动多源黏弹性边界方程。同时为减小前处理工作量,结合黏弹性本构方程和UMAT子程序构建了移动多源黏弹性边界单元,实现了边界单元材料属性的自动更新,并进行了算例验证。研究结果表明,在多源和移动源作用下,移动多源黏弹性边界和自由边界的计算结果差异基本保持在5%以内,而修正前的黏弹性边界与自由边界的垂向位移最大可相差35%。可以看出,相比于修正前的黏弹性边界,在处理多源和移动源问题时修正后的黏弹性边界具有更高的精度。

关键词：铁路交通荷载黏弹性边界移动源多源土体振动

基于60N钢轨廓形的客货共线铁路道岔区轮轨接触关系

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铁道建筑 2024年第6期64卷 24-29页

作者：马俊琦王树国王璞安博伦高原中国铁道科学研究院研究生部北京100081 高速铁路轨道系统全国重点实验室北京100081 中国铁道科学研究院集团有限公司铁道建筑研究所北京100081 中国铁道科学研究院集团有限公司金属及化学研究所北京100081

为了研究客货共线铁路采用60N钢轨廓形时道岔区的轮轨关系,以标准60 kg/m钢轨为对比,首先建立多体动力学模型,采用基线法,从导曲线区、转辙器区及辙叉区三个部分的特征断面入手,研究了采用两种钢轨廓形时轮轨接触位置、轮径差等关键轮... 详细信息

为了研究客货共线铁路采用60N钢轨廓形时道岔区的轮轨关系,以标准60 kg/m钢轨为对比,首先建立多体动力学模型,采用基线法,从导曲线区、转辙器区及辙叉区三个部分的特征断面入手,研究了采用两种钢轨廓形时轮轨接触位置、轮径差等关键轮轨接触几何参数的变化规律;然后,建立轮轨接触有限元模型,计算分析各特征断面轮轨接触应力变化情况。结果表明:相比标准60 kg/m钢轨,车轮与60N钢轨廓形匹配时,接触点分布更集中,轮径差变化较小,接触斑呈椭圆形,应力增长相对缓和,但在转辙器区及辙叉区过渡较急促;60N钢轨廓形更适合工况较简单的导曲线区段,而标准60 kg/m钢轨廓形更适合工况较为复杂的转辙器区及辙叉区。

关键词：客货共线铁路道岔轮轨关系模型试验有限元分析几何关系接触应力

An Initial Residual Stress Inference Method by Incorporating Monitoring Data and Mechanism Model

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Chinese Journal of Mechanical Engineering 2022年第5期35卷 47-65页

作者： shuguo wang Yingguang Li Changqing Liu Zhiwei Zhao Nanjing University of Aeronautics and Astronautics Nanjing 210016China

Initial residual stress is the main reason causing machining deformation of the workpiece,which has been deemed as one of the most important aspects of machining quality *** inference of the distribution of initial residual stress inside the blank has significant meaning for machining deformation *** to the principle error of existing residual stress detection methods,there are still challenges in practical *** at the detection problem of the initial residual stress field,an initial residual stress inference method by incorporating monitoring data and mechanism model is proposed in this *** data during machining process is used to represent the macroscopic characterization of the unbalanced residual stress,and the finite element numerical model is used as the mechanism model so as to solve the problem that the analytic mechanism model is difficult to establish;the policy gradient approach is introduced to solve the gradient descent problem of the combination of learning model and mechanism ***,the initial residual stress field is obtained through iterative calculation based on the fusing method of monitoring data and mechanism *** results show that the proposed inference method of initial residual stress field can accurately and effectively reflect the machining deformation in the actual machining process.

关键词： Initial residual stress Inference Monitoring data Mechanism model Policy gradient

高速道岔组装式滑床台板传力特征及服役性能研究

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铁道学报 2024年第2期46卷 131-139页

作者：易强王树国杨东升谷永磊中国铁道科学研究院集团有限公司铁道建筑研究所北京100081 京沪高速铁路股份有限公司北京100038

为探明高速铁路道岔基本轨轨底疲劳伤损原因,开展组装式滑床台板传力特征及服役性能研究。建立转辙器基本轨受力分析模型,研究两点与平面扣压式滑床台板条件下基本轨轨底应力特征,结合基本轨轨底材质疲劳试验与转辙器组装疲劳试验,评估... 详细信息

为探明高速铁路道岔基本轨轨底疲劳伤损原因,开展组装式滑床台板传力特征及服役性能研究。建立转辙器基本轨受力分析模型,研究两点与平面扣压式滑床台板条件下基本轨轨底应力特征,结合基本轨轨底材质疲劳试验与转辙器组装疲劳试验,评估两点与平面扣压式滑床台板对基本轨服役性能的影响。结果表明:两点扣压式滑床台板使得基本轨轨底形成应力集中,且扣压点对应的轨底下表面以受拉为主;130~190 kN疲劳荷载条件下,两点扣压式滑床台板可使得基本轨轨底最大应力达611.2 MPa,已经超出基本轨轨底疲劳极限,而平面扣压式滑床台板对应的基本轨轨底最大应力为237.5 MPa,相对两点扣压结构降低50%~60%;转辙器结构组装状态对基本轨服役性能影响显著,基本轨轨底应力与尖轨-滑床台接触状态密切相关。

关键词：高速道岔基本轨疲劳滑床台板传力特征疲劳试验

Effects of reconfiguration on the performance of mobile navigation robot

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High Technology Letters 2006年第3期12卷 245-249页

作者：付宜利 Xu He Li Han wang shuguo Ma Yuliu Advanced Manufacturing Technology Center Harbin Institute of Technology Harbin 150001 P. R. China

An irmovative mobile robot that has reconfigurable loeomotion chassis and reconfigurable bionic wheels has been developed to meet the needs of different payload and different terrain. Several prototypes have been achieved by the recortfiguration. By modeling relative comparison coefficients, these prototypes are analyzed in terms of geometrical parameter of trafficability, static stability and maneuverability. The effects of reconfiguration on these indices of robot performance can be compared, i.e. the variable height of chassis h has the biggest effect, the variable length of chassis 1 is the second, then is the camber angle β and the caster angle α. Some principles for reconfiguration are proposed.

关键词： reconfigurable chassis reconfigurable bionic wheel comparative coefficient mobile navigation robot

Avoiding obstacles by using a proximity infrared sensor skin

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High Technology Letters 2007年第2期13卷 126-130页

作者：曹政才 Fu Yili Wu Qidi wang shuguo wang Guangguo CIMS Research Center Tongji University Shanghai 200092 P.R. China Robotics Institute Harbin Institute of Technology Harbin 150001 P.R. China

Placement and wiring of vast amount of sensor elements on the 3-dimensionally configured robot sur-face to form soft sensor skin is very difficult with the traditional technology. In this paper we propose a new method to realize such a *** implanting infrared sensors array in an elastic body, we obtain an elastic and tough sensor skin that can be shaped *** developed sensor skin is a large-area, flexi-ble array of infrared sensors with data processing *** on the skin electronics, it en-dows its carrier with an ability to sense its *** structure, the method of infrared sensor sig-nal processing, and basic experiments of sensor skin are presented. The validity of the infrared sensor skin is investigated by preliminary obstacle avoidance trial.

关键词： robot sensor skin infrared sensor obstacle avoidance

Experimental clearance rate and intraguild predation of jellyfish Cyanea nozakii

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Journal of Oceanology and Limnology 2024年第1期42卷 128-140页

作者： Pengpeng wang Fang ZHANG Song SUN shuguo LÜ CAS Key Laboratory of Marine Ecology and Environmental Sciences Institute of OceanologyChinese Academy of SciencesQingdao 266071China Laboratory for Marine Ecology and Environmental Sciences Pilot National Laboratory for Marine Science and Technology(Qingdao)Qingdao 266237China University of Chinese Academy of Sciences Beijing 100049China Jiaozhou Bay Marine Ecosystem Research Station Chinese Academy of SciencesQingdao 266071China Center for Ocean Mega-Science Chinese Academy of SciencesQingdao 266071China Institute of Marine Ecology and Environment Hainan Academy of Environmental SciencesHaikou 570100China

Cyanea nozakii,a common jellyfish distributed in offshore China,has a complex trophic relationship with other zooplankton ***,few studies have reported the predation rates and prey selection patterns of *** medusae on different prey *** is also lacking on the intraguild predation of Aurelia coerulea(another common bloom jellyfish in offshore China)by *** address the knowledge gaps,the clearance rates of *** for different prey items,including copepods(small1000μm),fish larvae,and gelatinous prey(hydromedusae,*** ephyrae,and chaetognaths),were *** influence of predator size on the clearance rate was also ***,we examined the intraguild predation of *** on *** *** clearance rates of *** varied widely with prey organisms,being independent of prey *** organisms,except for chaetognaths,were captured with considerably high efficiency,followed by fish larvae and copepods,indicating the preferential prey selection of gelatinous organisms by *** clearance rate increased linearly with the cross-sectional area of *** size in medusae may,to some extents,underpin their capacity to capture more prey by increasing the encounter rate and capture success through *** preyed voraciously on *** in high feeding efficiency,but the clearance rate decreased with increasing ***(as prey)*** phenomenon of intraguild predation suggests a speculative hypothesis of potential population regulation of *** by *** information regarding the feeding ecology of *** reported in this study is important for understanding plankton dynamics in marine ecosystems with extensive occurrences of this jellyfish.

关键词： Scyphomedusae predation rate gelatinous organisms prey selection feeding mechanism