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依据岩心、薄片、测井等资料对东营凹陷北部陡坡带永安地区古近系沙河街组沙四上亚段近岸水下扇砂体中碳酸盐胶结物的分布特征进行研究。结果表明:碳酸盐胶结物(体积分数)含量高(>15%)的砂岩在近岸水下扇外扇及滑塌浊积扇等薄层粉细砂岩中分布普遍,碳酸盐胶结物含量低(<10%)的砂岩往往出现在近岸水下扇中扇沟道微相的厚层砂岩中;外扇胶结层的横向连续性好,中扇的碳酸盐胶结带仅位于沟道砂岩的顶底部、横向延伸小、铁白云石普遍;中扇、外扇的胶结层单层厚度通常小,内扇的胶结层单层厚度较大,砾岩中灰岩砾石及钙质杂基含量较高、压实强;砂体中的长石能缓冲酸性地层水,方解石在砂体边缘附近区域富集形成胶结层,胶结层往往对应于斜长石溶蚀而现今斜长石含量较低的层段;碳酸盐胶结层造成近岸水下扇储层非均质性强,发育内扇物性遮挡的岩性油气藏。 相似文献
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将航天器的质量、质心和转动惯量调配到一定目标范围内,可以降低航天器姿态控制的难度,提高航天器姿态控制的准确性,利用虚拟样机技术和数值优化技术的相关软件设计了航天器配重仿真优化方法,能够对航天器进行构件设计,仿真装配、动力学分析和可变装配参数优化,能够支持构件可变质量优化和装配位置优化,最后通过空间机器人地面气浮仿真平台的配重实例验证了配重方法的正确性,结果表明该方法可以有效地对航天器进行配重优化。Abstract: The mass, centroid and moment of inertia of spacecraft, regulated at a certain target range, can reduce the difficulty and improve accuracy in spacecraft stance control. The relative software of virtual prototyping and numerical optimization techniques were used for designing the methods of simulation and optimization in spacecraft balance. The methods could make spacecraft devised in components, simulation assembly, dynamic analysis and parameter optimization of variable assembly and support the components of variable quality optimization and assembly location optimization. The accuracy of balancing platform was validated by the balancing example of space robot ground floatation simulation platform. The result shows that spacecraft can be effectively balanced and optimized by this method. 相似文献
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