在实际运行中,部分市政污水处理厂生化系统的BOD5污泥负荷(LS)长期达不到设计值,甚至在设计值的半数以内。文章根据相关公式及定义,对实际运行LS≤0.10 kg BOD5/(kg MLSS·d)的生化系统中LS、MLVSS/MLSS(f)和泥龄(θC)之间的关系式...在实际运行中,部分市政污水处理厂生化系统的BOD5污泥负荷(LS)长期达不到设计值,甚至在设计值的半数以内。文章根据相关公式及定义,对实际运行LS≤0.10 kg BOD5/(kg MLSS·d)的生化系统中LS、MLVSS/MLSS(f)和泥龄(θC)之间的关系式进行推导,并结合计算示例,探讨在进水LS长期低于设计值运行的情况下,生化系统中f和θC的计算结果和发展趋势,并以此作为类似生化系统调试和运行中控制θC的参考依据。展开更多
The most conventional vehicle pretensioner system consists of an internal gear pair with involute teeth. However, it has been well known that the corresponding gear pairs are relatively weak under the situation of imp...The most conventional vehicle pretensioner system consists of an internal gear pair with involute teeth. However, it has been well known that the corresponding gear pairs are relatively weak under the situation of impact loadings. To improve this phenomenon, a new pretensioning gear system with cycloid teeth rather than the involute ones was proposed, and dual cycloidal gear mechanisms were designed for satisfying geometric constraints and dynamic loading conditions. The simulations of the prototypes were conducted by LS-DYNA program and the experiments for a prototype were performed for a dynamic model with impact loading devices. The results show that the better operation and the smoother motion are confirmed in the proposed cycloidal gear system rather than the conventional one without interferences between gear teeth under the impact of a crash.展开更多
Distributed testing system has strong applicability in the field of dynamic testing,which can centrally manage the testing equipment in different locations through the local area network,and meet the new requirements ...Distributed testing system has strong applicability in the field of dynamic testing,which can centrally manage the testing equipment in different locations through the local area network,and meet the new requirements of the test.Based on the theory of seismic location,the location of underground explosion center was studied.The applicability of seismic location theory to the location of underground explosion center was verified by simulating the underground explosion with LS-DYNA simulation platform.Combined with distributed testing system theory and weighting method,the optimal distribution method of test points was summarized through data analysis.展开更多
文摘在实际运行中,部分市政污水处理厂生化系统的BOD5污泥负荷(LS)长期达不到设计值,甚至在设计值的半数以内。文章根据相关公式及定义,对实际运行LS≤0.10 kg BOD5/(kg MLSS·d)的生化系统中LS、MLVSS/MLSS(f)和泥龄(θC)之间的关系式进行推导,并结合计算示例,探讨在进水LS长期低于设计值运行的情况下,生化系统中f和θC的计算结果和发展趋势,并以此作为类似生化系统调试和运行中控制θC的参考依据。
基金supported by the Changwon National University in 2011-2012,Korea
文摘The most conventional vehicle pretensioner system consists of an internal gear pair with involute teeth. However, it has been well known that the corresponding gear pairs are relatively weak under the situation of impact loadings. To improve this phenomenon, a new pretensioning gear system with cycloid teeth rather than the involute ones was proposed, and dual cycloidal gear mechanisms were designed for satisfying geometric constraints and dynamic loading conditions. The simulations of the prototypes were conducted by LS-DYNA program and the experiments for a prototype were performed for a dynamic model with impact loading devices. The results show that the better operation and the smoother motion are confirmed in the proposed cycloidal gear system rather than the conventional one without interferences between gear teeth under the impact of a crash.
基金Open Research Fund for Key Laboratory of Damage Technology(No.DXMBJJ2017-12)。
文摘Distributed testing system has strong applicability in the field of dynamic testing,which can centrally manage the testing equipment in different locations through the local area network,and meet the new requirements of the test.Based on the theory of seismic location,the location of underground explosion center was studied.The applicability of seismic location theory to the location of underground explosion center was verified by simulating the underground explosion with LS-DYNA simulation platform.Combined with distributed testing system theory and weighting method,the optimal distribution method of test points was summarized through data analysis.
