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Improvement of cutting simulation using the octree method 总被引:1,自引:1,他引:0
Yong-Hyun Kim Sung-Lim Ko 《The International Journal of Advanced Manufacturing Technology》2006,28(11-12):1152-1160
This paper develops an octree-based algorithm for machining simulation. Most commercial machining simulators are based on the Z-map model, which has several limitations in terms of achieving a high level of precision in five-axis machining simulation. Octree representation being a three-dimensional (3D) decomposition method, an octree-based algorithm is expected to be able to overcome such limitations. With the octree model, the storage requirement is reduced. Moreover, recursive subdivision is processed in the boundaries, which reduces useless computations. The supersampling method is the most common form of antialiasing and is typically used with polygon mesh rendering in computer graphics. The supersampling technique is being used to advance the efficiency of the octree algorithm. 相似文献
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Lv-Sha Cheng Hyun-Wook Kang Dong-Woo Cho 《Journal of Mechanical Science and Technology》2006,20(10):1722-1729
Predicting the mechanical properties of the 3-D scaffold using finite element method (FEM) simulation is important to the
practical application of tissue engineering. However, the porous structure of the scaffold complicates computer simulations,
and calculating scaffold models at the pore level is time-consuming. In some cases, the demands of the procedure are too high
for a computer to run the standard code. To address this problem, the representative volume element (RVE) theory was introduced,
but studies on RVE modeling applied to the 3-D scaffold model have not been focused. In this paper, we propose an improved
FEM-based RVE modeling strategy to better predict the mechanical properties of the scaffold prior to fabrication. To improve
the precision of RVE modeling, we evaluated various RVE models of newly designed 3-D scaffolds using FEM simulation. The scaffolds
were then constructed using microstereolithography technology, and their mechanical properties were measured for comparison. 相似文献
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工程车辆ADAMS建模与平顺性仿真 总被引:1,自引:0,他引:1
利用动力学分析软件ADAMS,建立了钢板弹簧车辆和油气弹簧车辆的动力学模型,开展了整车在随机路面上的平顺性仿真,分析了两种悬架对车辆平顺性的影响,并通过仿真数据与试验数据的对比,验证了动力学模型的正确性. 相似文献
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分析了机床加工存在误差的主要原因,着重分析因机床误差及工艺系统受力和热变形引起的常见加工缺陷及改善措施。 相似文献