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                          • 安全文化建設工作計劃 (2)doc

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                            2022-03-31 07:45:38瀏覽:9 (2DO

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                          • 安全文化建設工作計劃(2)doc

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                            2022-03-31 07:45:38瀏覽:11 (2DO

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                          • 職業衛生檔案管理規范(完整資料)doc

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                            2022-03-31 07:45:38瀏覽:8 )(DO

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                          • 用電安全隱患整改標準對照表(3)doc

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                            2022-03-30 23:03:52瀏覽:12 (3DO

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                          • 某模具公司生產事故應急預案(19)doc

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                            2022-03-30 23:03:52瀏覽:8 (1DO

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                          • 案(19)doc

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                            2022-03-29 19:00:16瀏覽:7 (1DO

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                          • 安全文化建設工作計劃(2)doc

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                            2022-03-29 19:00:14瀏覽:8 (2DO

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                          • 安全用電隱患整改措施對照表(3)doc

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                            2022-03-29 19:00:07瀏覽:5 (3DO

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                          • 防汛防洪專項應急救援預案 (2)doc

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                            2022-03-28 21:50:05瀏覽:10 (2DO

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                          • (2)doc

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                            2022-03-27 09:46:39瀏覽:12 2DO(

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                          • 知書(樣本)doc

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                          • Three-dimensional finite element analysis of process-induced residual stress in resin transfer moldi

                            A three-dimensional finite element analysis of process-induced residual stress in resin transfer mold-ing (RTM) process is presented. The finite element method ( FEM ) was employed to solve the coupled equa-tions involved in the transient heat transfer and the cure kinetics of the resin, and the distributions of internal temperature and cure degree of the composite at any instant time were obtained. The self-consistent field micro-mechanics model was used to predict the cure-dependent mechanical properties of the composites. Thermal ex-pansion and cure shrinkage were included in the analysis. The thermo-elastie mechanical governing equationswere solved using the incremental stress-strain relationship based FEM and the residual stress development was predicted. The present results were validated by the comparisons with the pertinent literature. The numerical example of a half cylinder was presented. The results show that it is necessary to carry out the three-dimensional analysis due to the complex distributions of temperatures, cure degrees and process-induced stress for thick parts, which can be predicted at any point within composite structures in the present analysis....

                            2020-11-11 22:33:38瀏覽:24 cureresidualstressfiniteelementmethodresintransfermolding(RTM)

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                          • Numerical Simulation and Analysis of Migration Law of Gas Mixture Using Carbon Dioxide as Cushion Ga

                            One of the major technical challenges in using carbon dioxide ( CO2 ) as part of the cushion gas of the underground gas storage reservoir ( UGSR) is the mixture of CO2 and natural gas. To decrease the mixing extent and manage the migration of the mixed zone, an understanding of the mechanism of CO2 and natural gas mixing and the diffusion of the mixed gas in aquifer is necessary. In this paper, a numerical model based on the three dimensional gas-water two-phase flow theory and gas diffusion theory is developed to understand this mechanism. This model is validated by the actual operational data in Dazhangtuo UGSR in Tianjin City, China. Using the validated model, the mixed characteristic of CO2 and natural gas and the migration mechanism of the mixed zone in an underground porous reservoir is further studied. Particularly, the impacts of the following factors on the migration mechanism are studied:the ratio of CO2 injection, the reservoir porosity and the initial operating pressure. Based on the results, the optimal CO2 injection ratio and an optimal control strategy to manage the migration of the mixed zone are obtained. These results provide technical guides for using CO2 as cushion gas for UGSR in real projects....

                            2020-09-13 23:35:02瀏覽:29 undergroundgasstoragereservoir(UGSR)cushioncarbondioxidemixedzone

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                          • 神府煤水煤漿管道輸送試驗研究

                            為獲得神府煤水煤漿最佳管道輸送參數,進行了水煤漿流變性試驗,確定了水煤漿臨界剪切速率。通過水煤漿剪切速率和剪切應力的關系確定神府煤水煤漿流變性模型,擬合出適于神府煤水煤漿流變性的數學方程。在不同管道直徑和水煤漿濃度下,研究了水煤漿平均速率對管道壓力損失的影響,得到了最佳水煤漿管道輸送參數。結果表明:神府煤水煤漿臨界剪切速率為40?74 s-1,水煤漿擬合后的流變方程符合賓漢塑性體模型,適宜泵送和管道輸送。低濃度、低黏度的水煤漿更適合管道輸送。在水煤漿平均流速相同的條件下,管道直徑越小,管道壓力損失越大。管道直徑為200~300 mm時,神府煤水煤漿在管道輸送中的壓力損失在工業應用合理范圍內,適宜管道輸送。...

                            2020-06-12 14:34:26瀏覽:1383 水煤漿管道輸送輸送特性流變性賓漢塑性體模型壓力損失coalwatermixture(CWM)pipeline

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                          • 神府煤水煤漿管道輸送試驗研究

                            為獲得神府煤水煤漿最佳管道輸送參數,進行了水煤漿流變性試驗,確定了水煤漿臨界剪切速率。通過水煤漿剪切速率和剪切應力的關系確定神府煤水煤漿流變性模型,擬合出適于神府煤水煤漿流變性的數學方程。在不同管道直徑和水煤漿濃度下,研究了水煤漿平均速率對管道壓力損失的影響,得到了最佳水煤漿管道輸送參數。結果表明:神府煤水煤漿臨界剪切速率為40?74 s-1,水煤漿擬合后的流變方程符合賓漢塑性體模型,適宜泵送和管道輸送。低濃度、低黏度的水煤漿更適合管道輸送。在水煤漿平均流速相同的條件下,管道直徑越小,管道壓力損失越大。管道直徑為200~300 mm時,神府煤水煤漿在管道輸送中的壓力損失在工業應用合理范圍內,適宜管道輸送。...

                            2020-03-23 18:44:21瀏覽:1388 水煤漿管道輸送輸送特性流變性賓漢塑性體模型壓力損失coalwatermixture(CWM)pipeline

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