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A Novel Modularizing Design Method of 10 kV High Voltage Switchgear for Live Maintenance 认领
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作者 Yuan Yao Xudong Ouyang +2 位作者 Guowei Zeng Qi Tang Wenyu Ma 《能源与动力工程(英文)》 2020年第4期1-13,共13页
Due to imperfect manufacturing technology, design defects and environmental impact, the failure rate of 10 kV switchgear is very high. For this reason, based on taken present situation of traditional switchgear and th... Due to imperfect manufacturing technology, design defects and environmental impact, the failure rate of 10 kV switchgear is very high. For this reason, based on taken present situation of traditional switchgear and the current technical requirements for switchgear into account, a new reliable and safe modular high voltage switchgear design method is presented in this paper, which can reduce the failure rate of switchgear and improve the reliability of power supply. The electric field and temperature rise simulation model are established to check the reasonability and validity. By using the finite element software, the simulation results show that the design in this paper has a maximum temperature rise of 55 K for the main cabinet and a maximum temperature rise of 45 K for the deputy cabinet, which is far below the international standard of 70 K. The areas where the partial discharge is likely to occur within the switchgear are places such as the connection between bus-bar and cabinet, bus-bar joint and bus-bar corner. In order to avoid potential dangers, the discharge point must be located in time to prevent insulation fault of electrical equipment of the high voltage switchgear. The simulation results demonstrate that the design method in this paper greatly improve the reliability of switchgear and meets the demands of power system. 展开更多
关键词 SWITCHGEAR FINITE ELEMENT Temperature FIELD Electric FIELD IMPROVEMENT
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Numerical Model of Ultra-High Molecular Weight Polyethylene Abrasive Wear Tests 认领
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作者 Tomas De la Mora Ramírez Isaías Hilerio Cruz +3 位作者 Marco Antonio Do?u Ruiz Noé López Perrusquia David García Bustos Martín Flores Martínez 《材料科学建模与数值模拟(英文)》 2020年第1期1-14,共14页
Ultra-high molecular weight polyethylene (UHMWPE) has been used in orthopedics as one of the materials for artificial joints in knee, hip and spine prostheses, most of the implanted joints are designed so that the met... Ultra-high molecular weight polyethylene (UHMWPE) has been used in orthopedics as one of the materials for artificial joints in knee, hip and spine prostheses, most of the implanted joints are designed so that the metal of the prosthesis is articulate against a polymeric material, however the main problems is the average life time of the UHMWPE due to wear, and the particles generated by the friction of the metal on the articulation of the polymer are the most common inducer of osteolysis, generating a loosening of the implant leading to an imminent failure resulting in the total replacement of the prosthesis. In this investigation a numerical model of abrasive wear was made using the classic Archard wear equation applied to dynamic simulation of finite element analysis (FEA) of the micro-abrasion test using a subroutine written in Fortran language linked to the finite element software to predict the rate of wear. The results of the numerical model were compared with tests of abrasive wear in the laboratory, obtaining a margin of error below 5%,concluding that the numerical model is feasible for the prediction of the rate of wear and could be applied in knowing the life cycle of joint prostheses or for the tribological analysis in industrial machinery or cutting tools. The wear coefficient (K) was obtained from the grinding tests depending on the depth of stroke of the crater, which was analyzed by 3D profilometry to obtain the wear rate and the wear constant. 展开更多
关键词 ABRASIVE WEAR FINITE ELEMENT NUMERICAL WEAR Model UHMWPE
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Finite Element Modelling of Car Seat with Hyperelastic and Viscoelastic Foam Material Properties to Assess Vertical Vibration in Terms of Acceleration 认领
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作者 Purnendu Mondal Subramaniam Arunachalam 《工程(英文)(1947-3931)》 2020年第3期177-193,共17页
Primary objective of automobile seats is to offer adequate level of safety and comfort to the seated human occupant, primarily against vibration. Ideally, any sort of automotive seat is constructed by mechanical frame... Primary objective of automobile seats is to offer adequate level of safety and comfort to the seated human occupant, primarily against vibration. Ideally, any sort of automotive seat is constructed by mechanical framework, cushion, backrest and headrest. The frame structures are made of metallic alloys, while the cushion, backrest and headrest are made of polyurethane foam material. During the design phase of automotive seat, the greatest challenge is to assign realistic material properties to foam material;as it is non-linear in nature and exhibit hysteresis at low level stress. In this research paper, a car seat has been modelled in finite element environment by implementing both hyperelastic and viscoelastic material properties to polyurethane foam. The car seat has been excited with the loads due to car acceleration and human object and the effects of vibration in terms of vertical acceleration at different locations have been measured. The aims of this simulation study are to establish a car seat with the foam material properties as accurately as possible and provide a finite element set up of car seat to monitor the vertical acceleration responses in a reasonable way. The RMS acceleration values for headrest, backrest and cushion have been found to be 0.91 mm/sec2, 0.54 mm/sec2 and 0.47 mm/sec2, respectively, which showed that the car seat foam can effectively be modelled through combined hyperelastic and viscoelastic material formulations. The simulation outputs have been validated through real life testing data, which clearly indicates that this computerized simulation technique is capable of anticipating the acceleration responses at different car seat segments in a justified way. 展开更多
关键词 Car SEAT HYPERELASTIC MATERIAL VISCOELASTIC MATERIAL Finite Element VERTICAL ACCELERATION VERTICAL Vibration
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Thermo-hydro-mechanical modeling of fault discontinuities using zero-thickness interface element 认领
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作者 Ali Ranjbar Hossein Hassani +1 位作者 Kourosh Shahriar Mohammad Javad Ameri Shahrabi 《岩石力学与岩土工程学报:英文版》 CSCD 2020年第1期74-88,共15页
In this paper,a coupled thermo-hydro-mechanical(THM)simulation in a faulted deformable porous medium is presented.This model involves solving the mass conservation,linear momentum balance,and energy balance equations ... In this paper,a coupled thermo-hydro-mechanical(THM)simulation in a faulted deformable porous medium is presented.This model involves solving the mass conservation,linear momentum balance,and energy balance equations which are derived from the Biot’s consolidation theory.Fluid pore pressure,solid displacement,and temperature are chosen as initial variables in these equations,and the finite element method in combination with the interface element is used for spatial discretization of continuous and discontinuities(fault)parts of the medium to solve the equations.The main purpose of this study is providing precise formulations,applicability,and ability of the triple-node zero-thickness interface element in THM modeling of faults.It should be noted that the system of equations is solved using a computer code written in Matlab program.In order to verify the developed method,simulations of index problems such as Mandel’s problem,and coupled modeling of a faulted porous medium and a faulted aquifer are presented.The modeling results obtained from the developed method show a very good agreement with those by other modeling methods,which indicates its accuracy. 展开更多
关键词 Thermo-hydro-mechanical(THM) simulation Geomechanical coupling Zero-thickness ELEMENT Joint ELEMENT FINITE ELEMENT
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基于ANSYS模拟桥梁支座的弹簧单元刚度系数率定与振动台试验验证 认领
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作者 王桂萱 葛政青 秦建敏 《公路》 北大核心 2020年第2期74-78,共5页
支座刚度系数的取值对桥梁结构的动力响应有较大影响,选取合理的刚度系数可以优化桥梁的抗震性能。通过大型有限元软件ANSYS使用Combine14弹簧单元来模拟桥梁支座,选取0.1倍,1倍,10倍,20倍,50倍,100倍,200倍的初始法向刚度和切向刚度,... 支座刚度系数的取值对桥梁结构的动力响应有较大影响,选取合理的刚度系数可以优化桥梁的抗震性能。通过大型有限元软件ANSYS使用Combine14弹簧单元来模拟桥梁支座,选取0.1倍,1倍,10倍,20倍,50倍,100倍,200倍的初始法向刚度和切向刚度,通过数值计算所得的加速度、位移及应变峰值与振动台试验实测值的对比来进行取值率定。结果表明,当取100倍的初始刚度系数时为较合理取值。通过增大地震动峰值加速度将数值模拟值与试验实测值进行误差比较,误差都在5%左右,验证了弹簧单元刚度系数率定的准确性。率定及验证过程可为类似工程的刚度系数计算提供参考。 展开更多
关键词 桥梁支座 有限元 弹簧单元 刚度系数 率定 振动台试验 验证
螺旋桨激励水下壳体振动噪声数值研究 认领
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作者 徐野 熊鹰 黄政 《振动与冲击》 EI CSCD 北大核心 2020年第2期86-91,122共7页
为真实模拟壳体噪声的激励源特性,建立螺旋桨-轴系-壳体耦合系统有限元模型,以CFD计算得到的螺旋桨非定常载荷作为激励源,采用模态叠加法计算耦合系统强迫振动响应;分别以桨叶表面偶极子声源和耦合系统表面振速作为边界条件,采用声学直... 为真实模拟壳体噪声的激励源特性,建立螺旋桨-轴系-壳体耦合系统有限元模型,以CFD计算得到的螺旋桨非定常载荷作为激励源,采用模态叠加法计算耦合系统强迫振动响应;分别以桨叶表面偶极子声源和耦合系统表面振速作为边界条件,采用声学直接边界元法计算螺旋桨直接辐射噪声和耦合系统振动噪声。数值计算结果表明:两种噪声的声压级都随螺旋桨转速的增加而增大,其中振动噪声增幅较小;耦合系统振动噪声声压级随轴承刚度的增加而增大;两种噪声的声压级在量级上较为接近,在频谱及声压分布上具有各自的特征,在预报耦合系统水下辐射噪声时应综合考虑两种噪声的影响。 展开更多
关键词 螺旋桨 耦合系统 有限元 模态叠加法 直接边界元法 直接辐射噪声 振动噪声
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基于离散元和有限元耦合的溜槽应力变形分析 认领
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作者 任学平 贾翊伟 何珍光 《重型机械》 2020年第2期69-74,共6页
大型高炉布料溜槽在布料过程中,输料时间长易发生应力应变,如果进行试验研究,使得时间、资金耗费巨大且不方便实测。为此采用离散元仿真和有限元方法进行耦合数值模拟仿真对溜槽进行强度分析应力应变分析。以某3 000 m^3大型高炉布料溜... 大型高炉布料溜槽在布料过程中,输料时间长易发生应力应变,如果进行试验研究,使得时间、资金耗费巨大且不方便实测。为此采用离散元仿真和有限元方法进行耦合数值模拟仿真对溜槽进行强度分析应力应变分析。以某3 000 m^3大型高炉布料溜槽为研究对象,利用离散单元法建立高炉布料溜槽内部的复杂的冲击过程模拟,并获得更加逼近实际工况下的不同倾角下溜槽底部和各壁面所受载荷大小,最后建立有限元模型并进行受力加载,得到溜槽的所受应力位置和变形的情况,研究结果表明:溜槽与托架配合超差,造成溜槽脱扣而脱落,尾部发生变形,可为高炉布料溜槽结构改进分析提供一定的参考。 展开更多
关键词 布料溜槽 离散元 有限元 耦合 应变
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空调冷水机组减振研究 认领
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作者 杨雪春 《齐齐哈尔大学学报:自然科学版》 2020年第1期30-33,38共5页
分析冷水机组的振动特性,包括机组的振源、振动传递路径.将颗粒阻尼被动减振技术引入到空调冷水机组,为冷水机组减振提供了一种新的方向.采用有限元、离散元仿真与试验相结合,探究颗粒粒径、填充率、材料对减振效果的影响,找出最优的参... 分析冷水机组的振动特性,包括机组的振源、振动传递路径.将颗粒阻尼被动减振技术引入到空调冷水机组,为冷水机组减振提供了一种新的方向.采用有限元、离散元仿真与试验相结合,探究颗粒粒径、填充率、材料对减振效果的影响,找出最优的参数.根据冷水机组底座的振动特性选取合适的阻尼器安装位置,并设计相应的颗粒阻尼器,最终在冷水机组上验证减振效果.结果 表明,在底座上加颗粒阻尼器,整个机组的减振效果达到42%以上. 展开更多
关键词 减振 颗粒阻尼 离散元 有限元
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轴承力作用下船舶尾部声振特性研究 认领
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作者 崔杰 高聪 +1 位作者 魏强 李海超 《华中科技大学学报:自然科学版》 EI CAS CSCD 北大核心 2020年第2期126-132,共7页
利用有限元(FEM)/边界元法(BEM),建立了桨-轴-船尾部结构耦合振动模型,以实效伴流场下的螺旋桨轴承力作为激励源,分析了螺旋桨不同方向轴承力对尾部结构声振特性的影响.研究结果表明:在螺旋桨轴承力的作用下,船体结构振动响应峰值与螺... 利用有限元(FEM)/边界元法(BEM),建立了桨-轴-船尾部结构耦合振动模型,以实效伴流场下的螺旋桨轴承力作为激励源,分析了螺旋桨不同方向轴承力对尾部结构声振特性的影响.研究结果表明:在螺旋桨轴承力的作用下,船体结构振动响应峰值与螺旋桨倍叶频(BPF)或尾部结构固有频率相近;尾部结构水下辐射噪声特性随频率变化明显,当频率较低时,尾部结构的辐射噪声沿船长的分布相对均匀;随着频率升高,尾部结构的局部声辐射特性增强;水平力为引起船体结构振动并向外辐射噪声的主要分量. 展开更多
关键词 尾部结构 声固耦合 有限元 边界元 振动 声辐射
A block particle coupled model and its application to landslides 认领
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作者 Chun Feng Shihai Li Qindong Lin 《力学快报:英文版》 CAS CSCD 2020年第2期79-86,共8页
To simulate the progressive failure of slope,a block particle coupled model is introduced.Particle oriented cell mapping(POCM)algorithm is used to enhance the search efficiency,and particlepoint,particle-edge,particle... To simulate the progressive failure of slope,a block particle coupled model is introduced.Particle oriented cell mapping(POCM)algorithm is used to enhance the search efficiency,and particlepoint,particle-edge,particle-face contact detecting method is adopted to establish contact pair between particles and blocks precisely.Strain softening Mohr Coulomb model with tensile cutoff is adopted for blocks,and brittle Mohr Coulomb model is used for particles.The particle-block replacement approach is used to describe the fracture and fragmentation process of continuum media.Once the cohesion or tensile strength of one block reaches zero,the block will be deleted,and particles are generated at the same place with all information inherited from the deleted block.Some numerical cases related to landslides demonstrate the precision and rationality of the coupled model. 展开更多
关键词 Finite element method Discrete element method FRACTURE FRAGMENTATION LANDSLIDE
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船舶桨轴舵及船体艉部耦合振动噪声数值研究 认领
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作者 徐野 熊鹰 黄政 《推进技术》 EI CAS CSCD 北大核心 2020年第4期942-950,共9页
为研究船舶桨轴舵及船体艉部耦合振动噪声特性,将CFD整体计算得到的非定常力作为激励源,以分布载荷的形式加载于有限元模型上,并结合模态叠加法和声学边界元法建立了桨轴舵及船体艉部耦合振动噪声的数值计算方法。通过分析振动响应计算... 为研究船舶桨轴舵及船体艉部耦合振动噪声特性,将CFD整体计算得到的非定常力作为激励源,以分布载荷的形式加载于有限元模型上,并结合模态叠加法和声学边界元法建立了桨轴舵及船体艉部耦合振动噪声的数值计算方法。通过分析振动响应计算结果,发现频率较低时耦合系统振动响应受工况影响比频率较高时更加明显;振动响应最大幅值所在频率受结构特性和激励源的共同影响;在桨-轴系统中,桨叶的振动传递损失最大。通过对比不同模型的桨叶振动计算结果,发现桨-轴系统模型的计算值与桨-轴-船系统模型更为接近且不复杂,比单桨模型更为实用。通过分析振动噪声计算结果,发现振动响应频谱和声场分布均可反映结构的固有特性;船体振动贡献的总声压在耦合系统中占90%以上,而桨叶振动仅为1%左右,在预报螺旋桨引起的振动噪声时,需要将船体振动噪声考虑在内。 展开更多
关键词 螺旋桨 振动 噪声 CFD 有限元 模态叠加法 边界元
电动汽车用高功率密度感应电机的设计与研究 认领
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作者 谢颖 黎志伟 郭金鹏 《电机与控制学报》 EI CSCD 北大核心 2020年第2期46-54,共9页
针对目前永磁材料价格大幅度上涨,永磁电机和电动汽车动力系统成本增加的问题,给出了一个高功率密度感应电机方案,并介绍了方案的设计过程和感应电机提高功率密度的方法。运用有限元法计算了电机的输出能力、温升和转子强度等关键性能... 针对目前永磁材料价格大幅度上涨,永磁电机和电动汽车动力系统成本增加的问题,给出了一个高功率密度感应电机方案,并介绍了方案的设计过程和感应电机提高功率密度的方法。运用有限元法计算了电机的输出能力、温升和转子强度等关键性能。通过参数化扫描电机的气隙长度和铁心长度,总结了它们对电机性能的影响。计算了电机额定运行时的损耗分布,并设计了机壳水冷回路,通过电磁场和温度场耦合计算,得出了电机的温度分布规律。最后,为了保证电机转子高速运行时的可靠性,计算了转子形变趋势和应力分布,得到了应力随转速的变化规律。结果表明,该电机具有良好的输出性能,并且散热能力好,可以长时间运行。 展开更多
关键词 笼型感应电机 高功率密度 有限元 电磁场 温度场
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基于ANSYS汽轮机转子吊梁的截面分析及轻量优化设计 认领
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作者 刚培显 《河南科技》 2020年第2期12-14,共3页
针对汽轮机转子吊梁经验设计周期长、材料利用率低、安全裕度大、低应力区较多等问题,本研究使用Solidworks建立数字模型,在ANSYA环境下进行静力分析及拓扑优化设计,以质量减少百分比为目标函数,进行ANSYS迭代计算优化,通过对比优化前... 针对汽轮机转子吊梁经验设计周期长、材料利用率低、安全裕度大、低应力区较多等问题,本研究使用Solidworks建立数字模型,在ANSYA环境下进行静力分析及拓扑优化设计,以质量减少百分比为目标函数,进行ANSYS迭代计算优化,通过对比优化前、后的结构应力、应变及变形,为汽轮机转子吊梁的截面选择和轻量化设计提供有效指导。 展开更多
关键词 转子 双H截面 拓扑优化 有限元 轻量化
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某型云爆弹对地堡目标有生力量杀伤仿真研究 认领
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作者 叶军 刘天宇 +1 位作者 曹欣芹 徐冰川 《火力与指挥控制》 CSCD 北大核心 2020年第1期180-184,共5页
地堡类坚固工事难发现、难摧毁、难压制,如何对其开展有效打击一直是困扰我军的历史性难题。为探索某型云爆弹对地堡类目标有生力量打击效果,丰富作战手段,利用Ansys/Autodyn有限元仿真平台,模拟云爆弹爆炸冲击波超压对地堡内部人员作... 地堡类坚固工事难发现、难摧毁、难压制,如何对其开展有效打击一直是困扰我军的历史性难题。为探索某型云爆弹对地堡类目标有生力量打击效果,丰富作战手段,利用Ansys/Autodyn有限元仿真平台,模拟云爆弹爆炸冲击波超压对地堡内部人员作用效果,结合超压杀伤判据给出基于蒙特卡洛仿真的单个地堡封锁率评估模型。对比分析仿真试验和现地实打结果表明,所提模型方法具有较高可行性,为我军开展新型弹药作战效能研究提供了方法借鉴。 展开更多
关键词 地堡 云爆弹 有限元 地堡目标 蒙特卡洛
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基于灵敏度分析的某铝合金白车身轻量化研究 认领
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作者 罗宾 马丽春 李金龙 《内燃机与配件》 2020年第8期13-15,共3页
以某铝合金白车身为研究对象,建立有限元分析模型。以车身结构关键零部件的厚度为设计变量,对白车身质量、模态频率、弯曲刚度、扭转刚度进行灵敏度分析。根据灵敏度分析结果,对以上结构性能灵敏度较低的部件进行轻量化、对结构性能影... 以某铝合金白车身为研究对象,建立有限元分析模型。以车身结构关键零部件的厚度为设计变量,对白车身质量、模态频率、弯曲刚度、扭转刚度进行灵敏度分析。根据灵敏度分析结果,对以上结构性能灵敏度较低的部件进行轻量化、对结构性能影响较大的部件进行厚度优化。最终在保证铝合金白车身以上结构性能不降低的情况下,提出具有重要指导意义的轻量化方案,实现了满意的减重效果。 展开更多
关键词 白车身 有限元 灵敏度分析 轻量化
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A numerical study of prestressed high strength steel tubular members 认领
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作者 Michaela GKANTOU Marios THEOFANOUS Charalampos BANIOTOPOULOS 《结构与土木工程前沿:英文版》 SCIE EI CSCD 2020年第1期10-22,共13页
The structural behavior of prestressed high strength steel(HSS)tubular members is investigated through the execution of advanced finite element modeling.Numerical models are developed and validated against published e... The structural behavior of prestressed high strength steel(HSS)tubular members is investigated through the execution of advanced finite element modeling.Numerical models are developed and validated against published experimental data on HSS tubular members subjected to different levels of initial prestress and loaded either in tension or compression.The effect of the presence or absence of grouting on the strength and ductility of the members is also considered.To numerically replicate the structural response recorded in the tests,some key modeling features including the employed numerical solver,the adopted material models and the element types warrant careful consideration.Upon developing of the finite element models,the numerically generated ultimate loads,the corresponding failure modes and the full load-deformation curves are compared to the experimental ones,indicating a successful validation.As anticipated,prestressing enhances the load-bearing capacity for the tensile members,whereas it is detrimental for the compressive ones.A series of parametric studies is performed to assess the influence of key factors on the structural response of prestressed HSS members and the obtained results are discussed.Design guidance for tensile and compressive prestressed tubular members is also provided. 展开更多
关键词 finite element PRESTRESSING tubular members GROUT high strength steel
基于碰撞安全性的可导向防撞垫设计 认领
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作者 雷正保 陈小勇 张家波 《机械强度》 CAS CSCD 北大核心 2020年第2期475-479,共5页
针对目前可导向防撞垫的吸能单元在碰撞变形过程中挤压两侧波形板而导致波形板散落造成二次损伤的现状,从而提出了一种"H"型的吸能单元构型。根据我国《公路护栏安全性能评价标准》(JTGB05-01-2013)评价标准,设计了一种满足80... 针对目前可导向防撞垫的吸能单元在碰撞变形过程中挤压两侧波形板而导致波形板散落造成二次损伤的现状,从而提出了一种"H"型的吸能单元构型。根据我国《公路护栏安全性能评价标准》(JTGB05-01-2013)评价标准,设计了一种满足80 km/h碰撞速度的TA级可导向防撞垫,并通过建立车辆-防撞垫有限元仿真模型结合碰撞仿真试验,对TA级可导向防撞垫的碰撞安全性进行综合分析。结果表明,仿真计算所得车辆运行轨迹没有出现侧翻、攀爬和骑跨等现象,各碰撞工况车体的最大加速度分别为:17.3g、16.5g、14.6g、8.1g,满足碰撞安全性法规的评定标准要求。 展开更多
关键词 可导向防撞垫 吸能单元 有限元 碰撞安全性
Effect of Friction Coefficient on Deep Drawing of 6A16 Aluminum Alloy for Automobile Body 认领
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作者 刘钊扬 熊柏青 +4 位作者 LI Xiwu YAN Lizhen LI Zhihui ZHANG Yongan LIU Hongwei 《武汉理工大学学报:材料科学英文版》 SCIE EI CAS 2020年第1期208-214,共7页
Based on the ABAQUS/Explicit finite element method,the forming force changing trend of deep drawing test for 6A16 aluminum alloy plate after pre-aging and storage at room temperature for one month was simulated under ... Based on the ABAQUS/Explicit finite element method,the forming force changing trend of deep drawing test for 6A16 aluminum alloy plate after pre-aging and storage at room temperature for one month was simulated under friction coefficient ranging from 0 to 0.22.The lubricants selected for the tests were mechanical oil,butter and dry film lubricant,and the friction coefficient of these lubricants were 0.05,0.10 and 0.15,respectively.Microstructural evolution of 6 A16 aluminum alloy plate during drawing forming was investigated by OM,SEM and EBSD.The results showed that,with the increase of friction coefficient,the stress,strain and deformation degree in deformation zone increased,while the grain size in deformation zone decreased.Thus,the hardness of the cup-typed component increased with the increase of friction coefficient.Butter-lubricated cups had the highest tensile strength and yield strength after paint-bake cycle.The combination of simulation results and microstructure analysis of 6A16 aluminum alloy plate after drawing forming indicates that the appropriate lubricant is butter. 展开更多
关键词 finite element method 6A16 aluminum alloys DEEP DRAWING test FRICTION COEFFICIENT
ECR离子源微波窗损伤机理研究 认领
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作者 魏绪波 李公平 +2 位作者 潘小东 武启 刘玉国 《原子能科学技术》 EI CAS CSCD 北大核心 2020年第3期556-563,共8页
强束流下微波窗损坏是限制2.45 GHz电子回旋共振(ECR)离子源寿命的主要原因,为延长离子源使用寿命,对ECR离子源微波窗损伤机理进行了研究。利用有限元软件分别计算了Al 2O 3陶瓷微波窗在微波、等离子体和回流电子束作用下的温度及应力... 强束流下微波窗损坏是限制2.45 GHz电子回旋共振(ECR)离子源寿命的主要原因,为延长离子源使用寿命,对ECR离子源微波窗损伤机理进行了研究。利用有限元软件分别计算了Al 2O 3陶瓷微波窗在微波、等离子体和回流电子束作用下的温度及应力分布。计算结果表明,在微波和等离子体作用下,微波窗边缘处应力最大,在电子束作用下,微波窗中心位置应力最大。增强水冷效果可降低微波和等离子体对微波窗的影响,增加Al 2O 3陶瓷微波窗表面氮化硼(BN)的厚度可降低电子束的影响,从而减少微波窗损坏概率,延长离子源寿命。 展开更多
关键词 电子回旋共振离子源 微波窗 强流离子束 有限元
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减速箱体结构优化设计 认领
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作者 张晴晴 《内燃机与配件》 2020年第2期14-15,共2页
为了解决巴哈赛车减速箱体轻量化问题,本文利用CATIA软件建立三维模型,并基于ANSYS软件进行减速箱的静力学分析和拓扑优化设计,结果表明:减速箱壳体优化后为3mm,应力和形变满足材料屈服强度要求,为巴哈赛车的减速箱机械结构轻量化设计... 为了解决巴哈赛车减速箱体轻量化问题,本文利用CATIA软件建立三维模型,并基于ANSYS软件进行减速箱的静力学分析和拓扑优化设计,结果表明:减速箱壳体优化后为3mm,应力和形变满足材料屈服强度要求,为巴哈赛车的减速箱机械结构轻量化设计提供重要参考。 展开更多
关键词 减速箱 有限元 静力分析 拓扑优化
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