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차량 NVH 개선을 위한 Powertrain mounting boss stiffness 관한 연구
조미희(Mihui Jo),유영우(Yeongwoo Yoo),장성식(Seongsik Jang) 한국자동차공학회 2012 한국자동차공학회 부문종합 학술대회 Vol.2012 No.5
This study is powertrain mounting boss stiffness analysis for improving vehicle NVH. This paper describes a procedure to calculate the Free-Free boss stiffness of powertrain mounting bosses using a finite element model of the full powertrain. For individual boss stiffness analysis, inertia relief method is used in this study. The predicted individual boss stiffness is used for design evaluation of boss stiffness to improve vehicle NVH, and boundary conditions in a component mounting bracket modal analysis. Composite boss stiffness analysis is to improve stiffness assessment of a set of bosses, by replacing the assessment of individual bosses with the combined effects of their stiffness and their relative location.
김기택(KiTaek Kim),김지수(JiSu Kim),박주환(JuHwan Park),이재영(JaeYoung Lee),조영우(YeongWoo Jo),양재권(JaeGwon Yang),장준희(JunHee Jang),최은선(EunSun Choi),김대덕(DaeDuk Kim) 대한약학회 2016 약학회지 Vol.60 No.2
Alginic acid and carboxymethyl cellulose sodium are dietary fibers from plants. They have a swelling property and delay the gastric emptying time, thereby resulting in feeling satiated after oral administration, which may eventually contribute to loss of body weight. The goal of this study was to compare swelling property of three commercial matrix tablets based on alginic acid and carboxymethyl cellulose sodium. When the swelling was determined by the Korean Ministry of Food and Drug Safety (MFDS) guideline, the tablet prepared by direct compression method with highly viscous swelling agent showed the highest swelling in acidic conditions. Water uptake of these tablets was rapid and completed within 30 min. Moreover, when the pH was changed from 2.5 to 6.8 buffer, the water uptake was not significantly changed in all tablets.