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车用磁阻传感器式电子罗盘系统的开发 总被引:1,自引:0,他引:1
基于磁阻传感器HMC1055的带姿态补偿功能,开发了包含信号放大和置位/复位模块的三维罗盘系统的硬件电路,并提出了干扰校正的软件算法以适应车内复杂的动态工作环境。 相似文献
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为实现不同冲击载荷下的吸能管结构逆向设计,应用复合材料强度和刚度理论,计算得到树脂基纤维增强复合材料正交各向异性的力学参数,同时应用非线性显式有限元算法模拟了轴向冲击载荷作用下管件的动态断裂过程。根据正交设计原理,得到了管件比吸能与其几何参数之间的非线性映射关系,并构造出了相应的响应表面。按照汽车正面碰撞对冲击加速度的... 相似文献
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孙凌玉 《华东冶金学院学报》1995,12(1):81-85
应用有限元方法和可靠的结构分析程序,对十字轴式万向联轴器进行了必要的分析计算,得出了避免共振的参考数据。 相似文献
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The excellent mechanical properties of carbon nanotubes make them potential candidates for engineering application. In this paper, the impact and failure behaviors of single-walled carbon nanotubes (SWCNTs) are investigated. The effects of diameter, length, and chirality on their energy absorption characteristics under lateral impact and axial crush are studied. By integrating the principle of molecular structural mechanics (MSM) into finite element method (FEM), the locations and directions of fracture process can be predicted. It is shown that the specific energy absorption (SEA) of SWCNTs is 1–2 order of magnitude higher than that of the ordinary metallic materials and composites in axial impact, indicating that carbon nanotubes are promising energy absorption materials for engineering applications. 相似文献
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The multi-scale modeling method was utilized to study the bending characteristics of a carbon nanotube(CNT)and CNT-reinforced composites.Through combining molecular dynamics and continuum mechanics,the tensional and flexural modulus of a CNT were calculated by a finite element model constructed by reticulate beams with solid cylinder shape and energy equal to C-C bonds.Then,another beam element with hollow cylinder shape and equivalent stiffness was utilized in place of a CNT in a matrix,thus,a multi-scale representative volume element(RVE)model of CNT-reinforced composite was established.Using this RVE model,the bending behavior of CNT-based composites was analyzed.The influence of diameter D,length L,aspect ratio L/D,volume fraction,chiral of CNTs and shape of RVE as well as the arrangement of CNTs in matrix on the reinforcement effect of flexural modulus of resultant nanocomposites were further discussed.The obtained data provide useful information for the design of CNT-reinforced composites. 相似文献
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To understand the relationship between the collapse mechanisms and geometry parameters of sandwich plate with two aluminum alloy faces and one polyurethane foam core, samples subjected to three-point bending loads were studied through simulation, test and analytic methods. Based on published papers, the dimensionless values of limit loads for different failure modes were modified according to real test condition. The load-deformation relation from the analytical formulae was compared with that from experimental and numerical results. A mechanism map was provided to reveal the dependence of the dominant collapse mechanism upon the geometry parameters of the face and the core. The results show that the prediction accuracy was high only if the face thickness was much smaller than the core thickness. 相似文献