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Experimentation and simulation study of electromechanical response characteristics of a 2-2 type cement-based piezoelectric composite sensor 2-2 型水泥基压电复合传感器机电响应特性的实验和模拟研究
IF 2.7 3区 材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY Pub Date : 2023-12-29 DOI: 10.1177/1045389x231216847
Haiwei Dong, Bohan Ma, Ziye Zhu, Zhe Li, Xiaokun Yang, Jiangying Chen
In the manuscript, the piezoelectric functional element was prepared by slicing and adding method using piezoelectric ceramic PZT-5H and ordinary silicate cement 42.5 was as base materials, and then a 2-2 type cement-based piezoelectric composite sensor was prepared by an encapsulated epoxy resin. The experimental and simulation analysis was carried out to obtain the quasi-static linear sensitivity of the electromechanical response of the sample under conditions of compressive loading. The development process of the sample from local failure to overall fragmentation was observed using a high-speed camera. Found that the electrical nonlinear threshold of 35 MPa appeared before the mechanical nonlinear threshold. Further, the results showed that when the loading frequency was increased from 5 to 15 Hz under equal amplitude, the response waveform remained unchanged, however, the electrical displacement was attenuated by 19.7%. Packaging schemes using various lengths and thicknesses of an epoxy layer were conducted by using simulation. It is indicated that, under the premise of ensuring the protection package and considering the manufacturing process, the length of the package side could increase appropriately, and the single-side package side length is set to 4 mm. When the thickness of the package layer becomes less, it would be better.
在该手稿中,以压电陶瓷 PZT-5H 和普通硅酸盐水泥 42.5 为基材,采用切片和添加法制备了压电功能元件,然后通过封装环氧树脂制备了 2-2 型水泥基压电复合传感器。通过实验和仿真分析,得到了样品在压缩载荷条件下机电响应的准静态线性灵敏度。使用高速摄像机观察了样品从局部破坏到整体碎裂的发展过程。结果发现,35 兆帕的电非线性阈值先于机械非线性阈值出现。此外,结果表明,当加载频率在等振幅条件下从 5 赫兹增加到 15 赫兹时,响应波形保持不变,但电位移衰减了 19.7%。通过模拟实验,采用不同长度和厚度环氧树脂层的封装方案。结果表明,在保证封装保护和考虑制造工艺的前提下,可以适当增加封装面的长度,单面封装面长度设为 4 毫米。当封装层厚度变小时,效果会更好。
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引用次数: 0
Non-contact embedded sensing by Magnetostrictive Carbon Fiber Reinforced Polymer (MagCFRP): A smart material for early inter-lamina localized damage detection 磁致伸缩碳纤维增强聚合物(MagCFRP)的非接触式嵌入传感:用于早期韧带间局部损伤检测的智能材料
IF 2.7 3区 材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY Pub Date : 2023-11-27 DOI: 10.1177/1045389x231200472
Brandon Williams, M. Coatney, Asha Hall, Oliver Myers, D. Seifu
Although failure mechanics and plasticity of composite materials is a relatively new and volatile field, it has been long realized in the composite materials community that a composite’s true integrity lies in the constituents’ interfacial health. Composite materials allow scientists and engineers to design structural architectures with directional stress, strain, and thermal fields in mind while simultaneously reducing the system’s overall weight. While there are advantages to using composite materials like carbon fiber reinforced polymers (CFRPs), designing and implementing long-term sustainable aerospace structures out of CFRPs is bottlenecked by the brittle catastrophic failure mechanism high strength carbon composites exhibit. As the demand for these materials in critical loading regimes increases, it is paramount that scientists and engineers understand how CFRPs will behave in real-time and in predictive models for load profiles. This research’s motivation comes from the US Army’s future vertical lift vehicle initiative to transition from interval-based maintenance to condition-based maintenance (CDB). This paper explores a real-time, non-contact, and non-destructive evaluation (NDE) method for composite materials by performing localized magnetic flux scans (32 mm2 field of view) of CFRP embedded with Terfenol-D ([Formula: see text] microns in diameter), a magnetostrictive material. For Magnetostrictive Carbon Fiber Reinforced Polymer (MagCFRP) elastic regime testing, there was an observed localized magnetic flux gradient of more than 5 mT (4%) with a reversible flux of 100%. For MagCFRP elastic-plastic regime testing, a localized magnetic flux gradient of more than 3 mT (2%) with a reversible flux of only 25% was observed. Terfenol-D embedded CRFPs have shown promising results for detecting instantaneous stress and strain levels and detecting deviations in inter-lamina residual stress after critical loading. Acoustic emission (AE), Digital Image Correlation (DIC), and X-ray computed tomography (CT) scanning were used to validate the observed results.
尽管复合材料的失效力学和塑性是一个相对较新且不稳定的领域,但复合材料界早已意识到,复合材料的真正完整性在于其成分的界面健康。复合材料允许科学家和工程师在设计结构架构时考虑到方向应力、应变和热场,同时减轻系统的整体重量。虽然使用碳纤维增强聚合物(CFRP)等复合材料有其优势,但由于高强度碳复合材料表现出的脆性灾难性失效机制,使用碳纤维增强聚合物设计和实施长期可持续的航空航天结构遇到了瓶颈。随着在关键负载条件下对这些材料需求的增加,科学家和工程师必须了解 CFRP 的实时行为以及负载曲线的预测模型。这项研究的动机来自于美国陆军未来的垂直升降车辆计划,即从基于间隔的维护过渡到基于状态的维护 (CDB)。本文通过对嵌入磁致伸缩材料 Terfenol-D([计算公式:见正文]直径为微米)的 CFRP 进行局部磁通量扫描(32 平方毫米视场),探索了一种用于复合材料的实时、非接触和无损评估 (NDE) 方法。在磁致伸缩碳纤维增强聚合物(MagCFRP)弹性体测试中,观察到局部磁通梯度超过 5 mT(4%),可逆磁通量为 100%。在 MagCFRP 的弹塑性机制测试中,观察到的局部磁通梯度超过 3 mT(2%),可逆磁通量仅为 25%。嵌入 Terfenol-D 的 CRFP 在检测瞬时应力和应变水平以及临界加载后检测层间残余应力偏差方面显示出良好的效果。声发射(AE)、数字图像相关性(DIC)和 X 射线计算机断层扫描(CT)被用来验证观察到的结果。
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引用次数: 0
Poromechanical modeling of fluid penetration in chemo-responsive gels: Parameter optimization and applications 化学反应凝胶中流体渗透的孔隙力学建模:参数优化及应用
3区 材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY Pub Date : 2023-11-06 DOI: 10.1177/1045389x231201039
Yuhao Shi, Thomas Wallmersperger
As an important category of smart materials, stimuli-responsive hydrogels are highly concerned due to their extensive application possibilities and their outstanding biocompatibilities. The ability of responsive hydrogels about significant volume change by external stimuli inspires the design of electronic devices, for example, as sensors and actuators. The modeling of the hydrogel behavior enables the optimization of corresponding applications. In the present research, on the basis of the experimentally determined material parameters, a chemo-poromechanical model was implemented in COMSOL Multiphysics ® to investigate the constricted swelling of hydrogels. The swelling kinetics affected by the diffusion coefficient is discussed in detail with numerical simulations.
刺激响应水凝胶作为智能材料的一个重要类别,因其广泛的应用前景和优异的生物相容性而备受关注。水凝胶对外部刺激下显著体积变化的响应能力启发了电子设备的设计,例如传感器和致动器。水凝胶行为的建模可以优化相应的应用。在本研究中,基于实验确定的材料参数,在COMSOL Multiphysics®中实现了化学孔隙力学模型,以研究水凝胶的收缩膨胀。通过数值模拟详细讨论了扩散系数对膨胀动力学的影响。
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引用次数: 0
Energy harvesting potential assessment and systematic design for energy-regenerative shock absorbers on railway freight wagons 铁路货车蓄能式减振器能量收集潜力评价与系统设计
3区 材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY Pub Date : 2023-11-04 DOI: 10.1177/1045389x231200146
Liwei Dong, Heli Zhang, Jie Yu, Guobiao Hu
A large amount of vibration energy is dissipated in the secondary suspension systems of railway freight wagons, which can be harvested as renewable power supplies to serve more smart devices for onboard applications. This paper explores the vibration energy harvesting potential of freight wagons and deals with the systematic design issues of energy-regenerative shock absorbers (ERSAs). By considering the ERSA force interaction and realistic track irregularity, a vehicle-track coupled model is established to predict a more accurate vibration response. The parameter sensibility analysis reveals that the operation speed, vehicle load, and track irregularity are the most critical factors that can significantly affect the power generation performance. In addition, vibration energy harvesting potential assessment is conducted on American, German, and Chinese track spectrums and several field-measured freight lines, indicating an average power potential ranging from 33 to 960 W per absorber with a full-loaded freight wagon running at 90 km/h. Finally, a systematic design approach for ERSAs is proposed based on the prior feasibility assessment, a hybrid Grey Wolf Optimization and Particle Swarm Optimization (GWO-PSO) algorithm, and the vehicle-ERSA coupled model. The digital twin of an ERSA has been established and validated by a series of experimental tests. Taking the average power as the objective and setting the suspension vibration velocity, maximum generator rotation velocity, and maximum ERSA force as constraints, the optimized ERSA exhibits an output power of 63 W and 20.22% shock absorption on the secondary suspension. Meanwhile, the GWO-PSO has demonstrated an enhanced exploration ability than the conventional GWO in dealing with the constrained optimization problem of the ERSA design.
铁路货车的二次悬挂系统耗散了大量的振动能量,这些能量可以作为可再生电源收集,为车载应用的更多智能设备提供服务。探讨了货车的振动能量收集潜力,探讨了蓄能式减振器的系统设计问题。考虑ERSA力相互作用和实际轨道不均匀性,建立了车辆-轨道耦合模型,以更准确地预测车辆的振动响应。参数敏感性分析表明,运行速度、车辆负荷和轨道不平顺度是影响发电性能的最关键因素。此外,对美国、德国和中国的轨道频谱和几条实地测量的货运线路进行了振动能量收集潜力评估,表明在满载货车以90公里/小时运行时,每个吸收器的平均功率潜力在33至960瓦之间。最后,提出了一种基于先验可行性评估、混合灰狼优化和粒子群优化(GWO-PSO)算法以及车辆- ersa耦合模型的ersa系统设计方法。建立了ERSA的数字孪生模型,并进行了一系列实验验证。以平均功率为目标,以悬架振动速度、发电机最大转速和最大ERSA力为约束条件,优化后的ERSA输出功率为63 W,二级悬架减震20.22%。同时,在处理ERSA设计的约束优化问题时,GWO- pso比传统GWO具有更强的探测能力。
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引用次数: 0
Optimal lateral embedded position of piezoelectric energy harvesters under various traffic conditions with wheel-path distribution 具有轮径分布的各种交通工况下压电能量采集器的最优横向埋设位置
3区 材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY Pub Date : 2023-11-03 DOI: 10.1177/1045389x231205021
Yangyang Zhang, Qi Lai, He Zhang, Yingwu Yang, Ji Wang, Chaofeng Lü
Piezoelectric energy harvesting from traffic load has gained extensive attention for potentiality as a renewable energy source. In existing in situ experiments, generally only one vehicle is employed, while the wheel-path of the vehicle and embedded positions of piezoelectric energy harvester (PEH) units are both fixed. However, in an actual traffic condition, vehicles travel randomly along width of pavements, which means the wheel-path varies over time and among vehicles. In this study, an electromechanical model is established for the PEH units under actual traffic conditions with wheel-path distribution, and is validated with finite element analysis and experiments. Then the electrical performance of PEH units embedded at various locations along pavements’ lateral direction is investigated under various traffic speeds. It is found that the optimal lateral embedded locations of the PEH units should be adjusted according to the prescribed traffic speed of the roads. Specifically, PEH units should be embedded at the tire-road contact areas for road with low traffic speeds (<15 m/s), while they should be embedded at the center of the pavement with high traffic speeds (>25 m/s). These mathematical results may serve as guidelines for selecting optimal lateral embedded locations for PEH units embedded in pavements.
从交通荷载中收集压电能量作为一种潜在的可再生能源受到了广泛的关注。在现有的原位实验中,一般只使用一辆车,并且车的轮路和压电能量采集器(PEH)单元的嵌入位置都是固定的。然而,在实际交通条件下,车辆沿着人行道的宽度随机行驶,这意味着车轮路径随时间和车辆而变化。在本研究中,建立了具有轮径分布的PEH单元在实际交通条件下的机电模型,并通过有限元分析和实验进行了验证。然后研究了在不同交通速度下,沿路面横向不同位置埋设的PEH单元的电气性能。研究发现,PEH单元的最佳横向埋设位置应根据道路规定的交通速度进行调整。具体而言,低速(15 m/s)道路应埋设在胎路接触区域,高速(25 m/s)道路应埋设在路面中心。这些数学结果可以作为选择PEH单元嵌入人行道的最佳横向嵌入位置的指导方针。
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引用次数: 0
Recent advancements in piezoelectric energy harvesting for implantable medical devices 用于植入式医疗设备的压电能量收集的最新进展
3区 材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY Pub Date : 2023-10-21 DOI: 10.1177/1045389x231200144
B Upendra, B Panigrahi, K Singh, GR Sabareesh
Biomedical implantable devices like deep brain stimulators, implantable cardioverter-defibrillators and cardiac pacemakers are essential for treating the human heart and brain-related diseases. In the past few decades, a considerable amount of research has focused on improving bio-implant technologies. Conventional bio implant devices consist of an external generator like a battery to power the system, which requires replacement after a particular time. Therefore, in recent years, self-powered implants with various energy harvesting techniques have been proposed to avoid frequent surgery for battery replacement and to miniaturise the implant systems. However, the research communities have yet to explore all the limitations and possibilities of improvement on such energy-scavenging technologies, especially when the application is in vivo. Several aspects of recent developments in energy harvesting technologies feasible for biomedical implantable devices are reported systematically. A detailed review of piezoelectric energy harvester mechanism and miniaturisation, electric output and power management and biocompatibility of an energy harvester for implantable medical devices in vitro and in vivo environments. Furthermore, the piezoelectric energy harvester’s durability, packaging material, connection and evaluation criteria are discussed.
生物医学植入式设备,如深部脑刺激器、植入式心律转复除颤器和心脏起搏器,对于治疗人类心脏和大脑相关疾病至关重要。在过去的几十年里,大量的研究集中在改进生物植入技术上。传统的生物植入装置由一个像电池一样的外部发电机为系统供电,在特定时间后需要更换。因此,近年来,采用各种能量收集技术的自供电植入物被提出,以避免频繁更换电池的手术,并使植入物系统小型化。然而,研究界尚未探索这种能量清除技术的所有局限性和改进的可能性,特别是在体内应用时。系统地报道了生物医学植入式装置中可行的能量收集技术的几个方面的最新发展。详细回顾了压电能量收集器的机制和小型化,电力输出和电源管理以及用于植入式医疗设备的能量收集器在体外和体内环境中的生物相容性。讨论了压电能量采集器的耐用性、封装材料、连接方式和评价标准。
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引用次数: 0
Free vibration of porous FG magneto-electro-elastic microbeams in the hygrothermal environment based on differential transformation method 基于微分变换法的多孔FG磁电弹性微梁在湿热环境下的自由振动
3区 材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY Pub Date : 2023-10-09 DOI: 10.1177/1045389x231197731
Yuewen Zhang, Yansong Li, Shu Li
Free vibration of the porous functionally graded magneto-electro-elastic (FGMEE) microbeams in hygrothermal environment is investigated. Four kinds of distributions of porosities including uniform porosity, “O,”“X,” and “V” type porosities are assumed in this paper. For the functionally graded microbeam, the physical neutral surface is considered. The modified couple stress theory is adopted to capture the size effect. The equations of motion for the porous FGMEE microbeam are derived and solved by differential transformation method. In the numerical examples, the effect of electric and magnetic loadings, material length scale parameter, the temperature rise, the moisture concentration, material gradient index, and porosity volume fraction on the natural frequency are analyzed and discussed in detail. The results indicate that different porous distribution modes have different effects on natural frequency. Moisture concentration/temperature rise can reduce the natural frequency regardless of what the temperature and moisture modes is. These results will be useful for the design of the porous FGMEE structures.
研究了多孔功能梯度磁电弹性(FGMEE)微梁在湿热环境中的自由振动。本文假设了均匀孔隙度、“O”型、“X”型和“V”型孔隙度四种孔隙度分布。对于功能梯度微光束,考虑了物理中性表面。采用修正的偶应力理论来捕捉尺寸效应。推导了多孔FGMEE微梁的运动方程,并用微分变换法求解。在数值算例中,详细分析和讨论了电磁载荷、材料长度尺度参数、温升、水分浓度、材料梯度指数和孔隙体积分数对固有频率的影响。结果表明,不同的孔隙分布方式对固有频率有不同的影响。无论温度和湿度模式是什么,湿度浓度/温度升高都会降低固有频率。这些结果将为FGMEE多孔结构的设计提供参考。
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引用次数: 0
Investigation of single and multicell honeycomb reinforced shape memory polymer composites: Shape optimization and experimental characterization 单细胞和多细胞蜂窝增强形状记忆聚合物复合材料的研究:形状优化和实验表征
3区 材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY Pub Date : 2023-10-07 DOI: 10.1177/1045389x231199855
Carson Squibb, Michael Philen
Honeycomb materials as reinforcements for shape memory polymers have been considered for their commercial availability, ease of geometric tailoring, and high in-plane stiffnesses. The design optimization of these honeycomb cells remains an open field of research, with many approaches taken in formulating the structural optimization problems. This investigation focuses on implementing a shape variable parametrization of the honeycomb to study the possible value of both cell asymmetry and spatially varying cell geometries in multicell networks. A unit cell finite element model framework was developed to predict the in-plane elastic properties of these composites, and two design objectives were selected to be optimized. Pareto fronts were estimated for multiple loading cases and cell wall material models, and experimental results were collected for model validation. The optimization results find that these composites can achieve a large range of performances, with maximum moduli as high as 17.2 GPa. Large asymmetry is found in the optimized cell geometries, and relationships are identified between loading cases and for different wall materials. Furthermore, the experimental results validate the finite element model predictions, with relative errors as low as 20% for the predicted maximum modulus and 2% for the modulus ratio.
蜂窝材料作为形状记忆聚合物的增强材料,由于其商业可用性、易于几何裁剪和高平面内刚度而被考虑。蜂窝蜂窝的优化设计仍然是一个开放的研究领域,在制定结构优化问题时采取了许多方法。本研究的重点是实现蜂窝的形状可变参数化,以研究多细胞网络中细胞不对称和空间变化的细胞几何形状的可能值。建立了单胞有限元模型框架,预测了复合材料的面内弹性性能,并选择了两个设计目标进行优化。对多种加载情况和细胞壁材料模型进行了帕累托前沿估计,并收集了实验结果进行模型验证。优化结果表明,复合材料具有较大的性能范围,最大模量高达17.2 GPa。在优化的单元几何形状中发现了很大的不对称性,并且确定了加载情况和不同壁材之间的关系。此外,实验结果验证了有限元模型的预测,预测最大模量的相对误差低至20%,模量比的相对误差低至2%。
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引用次数: 0
Characteristic analysis of a novel magnetorheological fabric composite cored flexible sandwich beam with tunable stiffness 一种新型可调刚度磁流变复合材料芯芯柔性夹层梁的特性分析
3区 材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY Pub Date : 2023-10-05 DOI: 10.1177/1045389x231197099
Pingyang Li, Xiaomin Dong, Zhenyang Fei, Qinglin Liu
This paper focuses on the performance improvement and evaluation of a novel flexible sandwich beam incorporated magnetorheological fluid porous fabric (MRF-PF). As a novel MR material, MRF-PF has been introduced, prepared, and measured to analyze the pre-yield property between complex shear modulus and magnetic fields. MRF-PF is used into the flexible sandwich beam as core layer. Pre-yield property with tunable stiffness is used to adjust the dynamic response. Then, a theoretical model is derived which can precisely describe the performance. Based on experimental results, sandwich beam incorporated MRF-PF has a good performance of controllability. When the magnetic field is applied into the free end, the natural frequency decreases with increasing the currents and filling ratio. In contrast, the frequency and amplitude increase when the clamped end is exposed to the magnetic fields. Comparing with other investigations, this proposed sandwich beam incorporated MRF-PF has a larger frequency range. The first and second natural frequency show the increases of 54.8% and 77.2%, respectively. The reduction of amplitude is closely related to the thickness of face plate. Therefore, the performance of the compound sandwich beam can be significantly improved by MRF-PF.
研究了一种新型含磁流变流体多孔结构的柔性夹层梁的性能改进与评价。作为一种新型磁流变材料,本文介绍、制备并测量了复合剪切模量与磁场之间的预屈服特性。在柔性夹层梁中采用磁流变pf作为核心层。利用可调刚度的预屈服特性来调节动态响应。在此基础上,推导了一个能准确描述其性能的理论模型。实验结果表明,含磁流变pf的夹层梁具有良好的可控性。在自由端施加磁场时,随电流和填充比的增大,固有频率减小。相反,当夹紧端暴露在磁场中时,频率和振幅增加。与其他研究相比,该夹层梁具有更大的频率范围。第一和第二固有频率分别增加了54.8%和77.2%。振幅的减小与面板的厚度密切相关。因此,复合夹层梁的性能可以显著提高。
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引用次数: 0
Multi-objective optimization design of magnetorheological damper and vehicle handling stability performance research 磁流变阻尼器多目标优化设计及车辆操纵稳定性研究
3区 材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY Pub Date : 2023-09-20 DOI: 10.1177/1045389x231195835
Xinxin Wei, Tianhong Yan, Shulin Liu
Due to the characteristics of smart material magnetorheological (MR) fluid, such as short response time and large controllable range, semi-active suspension based on MR fluid has been widely used. In order to improve the steering stability of vehicles, a semi-active suspension with tapered flow mode MR was proposed. The magnetic circuit of the proposed structure was designed, its dynamic model was established, and the finite element simulation analysis was carried out. By establishing the optimization objectives and constraints, the MR damper was optimized by NSGA-II and MOST algorithms. The vehicle dynamics model with MR damper was established, and the vehicle dynamics simulation was carried out under the control system based on the vehicle dynamics simulation software CarSim-Simulink before and after optimization. The results show that the NSGA-II optimized MR damper can reduce vehicle roll and significantly improve vehicle handling stability. This paper provides a new idea for improving vehicle handling stability by optimizing the MR damper.
由于智能材料磁流变液具有响应时间短、可控范围大等特点,基于磁流变液的半主动悬架得到了广泛的应用。为了提高车辆转向稳定性,提出了一种锥流型MR半主动悬架。设计了该结构的磁路,建立了其动力学模型,并进行了有限元仿真分析。通过建立优化目标和约束条件,采用NSGA-II和MOST算法对磁流变阻尼器进行优化。建立了带有磁流变阻尼器的车辆动力学模型,并基于车辆动力学仿真软件CarSim-Simulink在优化前后的控制系统下进行了车辆动力学仿真。结果表明,优化后的NSGA-II磁流变阻尼器能有效降低车辆侧倾,显著提高车辆操纵稳定性。通过优化磁流变阻尼器,为提高车辆操纵稳定性提供了新的思路。
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引用次数: 0
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Journal of Intelligent Material Systems and Structures
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