DYNAMIC ANALYSIS AND DESIGN CALCULATION METHODS FOR POWERTRAIN MOUNTING SYSTEMS

Shangguan, W.B.,Zhao, Y. The Korean Society of Automotive Engineers 2007 International journal of automotive technology Vol.8 No.6

A method for dynamic analysis and design calculation of a Powertrain Mounting System(PMS) including Hydraulic Engine Mounts(HEM) is developed with the aim of controlling powertrain motion and reducing low-frequency vibration in pitch and bounce modes. Here the pitch mode of the powertrain is defined as the mode rotating around the crankshaft of an engine for a transversely mounted powertrain. The powertrain is modeled as a rigid body connected to rigid ground by rubber mounts and/or HEMs. A mount is simplified as a three-dimensional spring with damping elements in its Local Coordinate System(LCS). The relation between force and displacement of each mount in its LCS is usually nonlinear and is simplified as piecewise linear in five ranges in this paper. An equation for estimating displacements of the powertrain center of gravity(C.G.) under static or quasi-static load is developed using Newton's second law, and an iterative algorithm is presented to calculate the displacements. Also an equation for analyzing the dynamic response of the powertrain under ground and engine shake excitations is derived using Newton's second law. Formulae for calculating reaction forces and displacements at each mount are presented. A generic PMS with four rubber mounts or two rubber mounts and two HEMs are used to validate the dynamic analysis and design calculation methods. Calculated displacements of the powertrain C.G. under static or quasi-static loads show that a powertrain motion can meet the displacement limits by properly selecting the stiffness and coordinates of the tuning points of each mount in its LCS using the calculation methods developed in this paper. Simulation results of the dynamic responses of a powertrain C.G. and the reaction forces at mounts demonstrate that resonance peaks can be reduced effectively with HEMs designed on the basis of the proposed methods.

FoxD2-AS1 is a prognostic factor in glioma and promotes temozolomide resistance in a O⁶-methylguanine-DNA methyltransferase-dependent manner

Shangguan, Wenbing,Lv, Xuyang,Tian, Nan The Korean Society of Pharmacology 2019 The Korean Journal of Physiology & Pharmacology Vol.23 No.6

Glioma is the most common brain tumor with a dismal prognosis. While temozolomide (TMZ) based chemotherapy significantly improves survival in glioma patients, resistance against this compound commonly leads to glioma treatment failure. Overexpression of long-noncoding RNA (LncRNA) FoxD2 adjacent opposite strand RNA 1 (FoxD2-AS1) was identified to promote glioma development, but the role in TMZ resistance remains unclear. In this paper, we found that FoxD2-AS1 was overexpressed in recurrent glioma, high FoxD2-AS1 expression was significantly correlated with poor patient outcome. Methylation of $O^6$-methylguanine-DNA methyltransferase (MGMT) is significantly less frequent in high FoxD2-AS1 expression patients. Knockdown of FoxD2-AS1 decreased the proliferation, metastatic ability of glioma cells and promote the sensitivity to TMZ in glioma cells. Furthermore, knockdown of FoxD2-AS1 induced hypermethylation of the promoter region of MGMT. Our data suggested that FoxD2-AS1 is a clinical relevance LncRNA and mediates TMZ resistance by regulating the methylation status of the MGMT promoter region.

Development of Unity3D Network Functionality on Android

Shangguan Dayan,Huang Xinyuan 보안공학연구지원센터 2016 International Journal of Hybrid Information Techno Vol.9 No.2

In the field of Mobile Terminal (MT), Unity3D game engine has displayed outstanding rendering power and highly aggregated script editing function while in practice the network function of Unity3D has not been fully developed yet. This paper, based on the comparison with traditional network technology, proposed to invoke Java to create a WIFI Local Area Network (WLAN), in which Unity network view component and remote procedure call (RPC) are employed to synchronize data and images on both ends of the network, thus developing a Unity online game. Finally the author of this paper has designed an online Unity3D chess game based on Android mobile platform. The results indicate that the invocation of Java has made up the deficiency of Unity network while RPC, as a reliable, free and economical method in the network transmission displays great adaptability. The combination of Java and RPC has proved to be a simple but an effective way to develop mobile online game.

시각적 은유광고에서 헤드라인의 유형에 따른 효과 차이 연구

샤라 ( Shangguan Shala ),이종민 ( Chong Min Lee ) 국민대학교 사회과학연구소 2017 社會科學硏究 Vol.30 No.1

본 연구는 광고에서 제시되는 시각적 이미지가 은유적으로 제시되고 이를 풀이해주는 헤드라인의 수준을 달리했을 경우(no headline 광고/moderate headline 광고/complete headline 광고), 광고해석 상의 정교화수준과 반박주장에 있어 어떠한 차이가 발생하는지 살펴보았다. 더 나아가 이에 따른 광고효과(광고태도와 브랜드태도) 수준의 차이에 대해서도 살펴보았다. 연구결과에 따르면 수사적 이미지 광고에서 헤드라인에 대한 이해도는 정교화와 반박주장에 영향을 미치는 것으로 나타났다. 또한 광고 이미지가 수사적으로 표현되면 헤드라인의 유무와 이해도는 광고태도와 브랜드태도와 같은 광고효과에 직접적인 영향을 미치지 않는 것으로 나타났다. The purpose of the study is to investigate the difference of image elaboration, counterargument, and furthermore ad effectiveness such as attitude toward the ad and brand attitude in the visual metaphor advertising among the different types of ad headlines(no headline ad/complete headline ad). According to the results, the comprehensiveness of ad headline has an impact on image elaboration and counterargument whereas it does not directly affect ad effects such as Aad and Ab.

Lightweight design for the aluminum alloy-carbon fiber hybrid structure of the EMU car body

Yiming Shangguan,Wenjing Wang,Anrui He,Wenjun Ma,Honglei Tian 대한기계학회 2023 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.37 No.12

This paper presents an innovative electric multiple unit (EMU) car body lightweight design approach that integrates structural and material optimizations. The structural lightweight design was carried out by using a sub-frame-based method and the non-dominated genetic algorithm II. The plate thicknesses of 28 car body components were chosen as the optimization design variable. The lightweight material design was realized by replacing the aluminum alloy with composite material. The two-dimensional Hashin criterion was used to analyze and validate the strength of the composite driver’s cab. Results show that after size optimization, the structure weight of the vehicle was reduced from 10964 kg to 8661 kg, which was 21.01 % less than the initial configuration. This modular lightweight design strategy for EMU car body optimization offers valuable insights that could be taken into account in future EMU car body designs.

Unified magnetic field model of regular polygonal coils for electromagnetic assessment in WPT systems

Xu Shangguan,Pingan Tan,Tingyu Tan,Bin Song,Huadong Liu 전력전자학회 2022 JOURNAL OF POWER ELECTRONICS Vol.22 No.3

Electromagnetic environment assessment plays an indispensable part in the practical application of wireless power transfer (WPT) technology. It can ensure that the WPT system meets the electromagnetic radiation limit requirements of the corresponding frequency. To improve the flexibility and universality of the electromagnetic environment assessment of WPT systems, a general magnetic field model suitable for regular polygonal coil wireless power transmission systems is proposed based on electromagnetic theory. First, using Biot–Savart law and by considering the correlation effect of the coil structure and parameters, a unified magnetic field model suitable for regular polygonal coils is established. On this basis, the model is used to compare and analyze the influence of different coil structures and parameters on magnetic flux density, and the evolution law of the electromagnetic radiation of the WPT system is obtained. Finally, the influences of transmission distance and misalignment on the electromagnetic environment of the WPT system are studied. The validity and accuracy of the model are verified by finite element simulation (FEM) and experimental results, which lays a theoretical foundation for the evaluation of the electromagnetic environment of WPT systems and the pre-design of coils.

FoxD2-AS1 is a prognostic factor in glioma and promotes temozolomide resistance in a O6-methylguanine-DNA methyltransferase-dependent manner

Wenbing Shangguan,Xuyang Lv,Nan Tian 대한약리학회 2019 The Korean Journal of Physiology & Pharmacology Vol.23 No.6

Glioma is the most common brain tumor with a dismal prognosis. While temozolomide (TMZ) based chemotherapy significantly improves survival in glioma patients, resistance against this compound commonly leads to glioma treatment failure. Overexpression of long-noncoding RNA (LncRNA) FoxD2 adjacent opposite strand RNA 1 (FoxD2-AS1) was identified to promote glioma development, but the role in TMZ resistance remains unclear. In this paper, we found that FoxD2-AS1 was overexpressed in recurrent glioma, high FoxD2-AS1 expression was significantly correlated with poor patient outcome. Methylation of O6-methylguanine-DNA methyltransferase (MGMT) is significantly less frequent in high FoxD2-AS1 expression patients. Knockdown of FoxD2-AS1 decreased the proliferation, metastatic ability of glioma cells and promote the sensitivity to TMZ in glioma cells. Furthermore, knockdown of FoxD2-AS1 induced hypermethylation of the promoter region of MGMT. Our data suggested that FoxD2-AS1 is a clinical relevance LncRNA and mediates TMZ resistance by regulating the methylation status of the MGMT promoter region.

Comparison of Aggregation Ways on Soil Property Maps

Wei Shangguan,Yongjiu Dai,Duoying Ji,Hua Yuan,Qian Zhang,Lili Wang 한국토양비료학회 2014 한국토양비료학회 학술발표회 초록집 Vol.2014 No.6

DYNAMIC ANALYSIS AND DESIGN CALCULATION METHODS FOR POWERTRAIN MOUNTING SYSTEMS

W.-B. SHANGGUAN,Y. ZHAO 한국자동차공학회 2007 International journal of automotive technology Vol.8 No.6

A method for dynamic analysis and design calculation of a Powertrain Mounting System (PMS) including Hydraulic Engine Mounts (HEM) is developed with the aim of controlling powertrain motion and reducing low-frequency vibration in pitch and bounce modes. Here the pitch mode of the powertrain is defined as the mode rotating around the crankshaft of an engine for a transversely mounted powertrain. The powertrain is modeled as a rigid body connected to rigid ground by rubber mounts and/or HEMs. A mount is simplified as a three-dimensional spring with damping elements in its Local Coordinate System (LCS). The relation between force and displacement of each mount in its LCS is usually nonlinear and is simplified as piecewise linear in five ranges in this paper. An equation for estimating displacements of the powertrain center of gravity (C.G.) under static or quasi-static load is developed using Newton’s second law, and an iterative algorithm is presented to calculate the displacements. Also an equation for analyzing the dynamic response of the powertrain under ground and engine shake excitations is derived using Newton’s second law. Formulae for calculating reaction forces and displacements at each mount are presented. A generic PMS with four rubber mounts or two rubber mounts and two HEMs are used to validate the dynamic analysis and design calculation methods. Calculated displacements of the powertrain C.G. under static or quasi-static loads show that a powertrain motion can meet the displacement limits by properly selecting the stiffness and coordinates of the tuning points of each mount in its LCS using the calculation methods developed in this paper. Simulation results of the dynamic responses of a powertrain C.G. and the reaction forces at mounts demonstrate that resonance peaks can be reduced effectively with HEMs designed on the basis of the proposed methods.

Dynamic Analysis and Design Calculation Methods for Powertrain Mounting Systems

Wen-Bin Shangguan,Zhao Yinyan 한국자동차공학회 2007 International journal of automotive technology Vol.8 No.6

A method for dynamic analysis and design calculation of a Powertrain Mounting System (PMS) including Hydraulic Engine Mounts (HEM) is developed with the aim of controlling powertrain motion and reducing low-frequency vibration in pitch and bounce modes. Here the pitch mode of the powertrain is defined as the mode rotating around the crankshaft of an engine for a transversely mounted powertrain. The powertrain is modeled as a rigid body connected to rigid ground by rubber mounts and/or HEMs. A mount is simplified as a three-dimensional spring with damping elements in its Local Coordinate System (LCS). The relation between force and displacement of each mount in its LCS is usually nonlinear and is simplified as piecewise linear in five ranges in this paper. An equation for estimating displacements of the powertrain center of gravity (C.G.) under static or quasi-static load is developed using Newton’'s second law, and an iterative algorithm is presented to calculate the displacements. Also an equation for analyzing the dynamic response of the powertrain under ground and engine shake excitations is derived using Newton’'s second law. Formulae for calculating reaction forces and displacements at each mount are presented. A generic PMS with four rubber mounts or two rubber mounts and two HEMs are used to validate the dynamic analysis and design calculation methods. Calculated displacements of the powertrain C.G. under static or quasi-static loads show that a powertrain motion can meet the displacement limits by properly selecting the stiffness and coordinates of the tuning points of each mount in its LCS using the calculation methods developed in this paper. Simulation results of the dynamic responses of a powertrain C.G. and the reaction forces at mounts demonstrate that resonance peaks can be reduced effectively with HEMs designed on the basis of the proposed methods.