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Investigation of 1 GPa Controlled Clearance Piston Gauge Using Finite Element Analysis
MAPAN ( IF 1 ) Pub Date : 2020-01-14 , DOI: 10.1007/s12647-019-00363-3 Rudi Anggoro Samodro , In-Mook Choi , Sam-Yong Woo
MAPAN ( IF 1 ) Pub Date : 2020-01-14 , DOI: 10.1007/s12647-019-00363-3 Rudi Anggoro Samodro , In-Mook Choi , Sam-Yong Woo
A one GPa controlled clearance piston gauge used as a high pressure standard at KRISS was investigated. In establishing the high pressure standard, the distortion coefficient is one of the most important parameters, but it is not easy to determine. The conventional analysis using a Heydemann–Welch model has a problem when determining a stall pressure, because of the nonlinear characteristic of fall rates with respect to pressure. Some metrological characteristics, such as the distortion coefficient of the piston–cylinder assembly in free deformation (FD) mode and the jacket distortion coefficient and stall pressure in controlled clearance (CC) mode, were investigated using a finite element analysis (FEA). In particular, it was determined that the relation of cubic fall rate to jacket pressure becomes nonlinear above 600 MPa. The FEA results were verified by comparison with a 500 MPa pressure standard and a fall rate measurement of 1 GPa. The most important parameter, the distortion coefficient in the FD and CC mode, was determined to be (7.59 ± 0.24) × 10−7 MPa−1 and (3.35 ± 0.39) × 10−7 MPa−1, respectively. A zero-distortion coefficient was obtained in the FEA when around 17% of the applied pressure was used as the jacket pressure. This value was similar to the experimentally determined result of around 20%.
中文翻译:
1 GPa控制间隙活塞规的有限元分析
研究了一种在KRISS上用作高压标准的GPa控制间隙活塞式压力计。在建立高压标准时,变形系数是最重要的参数之一,但不容易确定。使用Heydemann-Welch模型进行的常规分析在确定失速压力时会遇到问题,因为下降率相对于压力具有非线性特征。使用有限元分析(FEA)研究了一些计量特性,例如自由变形(FD)模式下的活塞-气缸总成的变形系数以及受控间隙(CC)模式下的夹套变形系数和失速压力。特别地,确定了在600MPa以上,立方下降率与夹套压力的关系变为非线性。通过与500 MPa压力标准和1 GPa的下降速率测量值进行比较,验证了FEA结果。最重要的参数是FD和CC模式下的失真系数,确定为(7.59±0.24)×10分别为-7 MPa -1和(3.35±0.39)×10 -7 MPa -1。当大约17%的外加压力用作夹套压力时,在FEA中获得零变形系数。该值类似于实验确定的约20%的结果。
更新日期:2020-01-14
中文翻译:
1 GPa控制间隙活塞规的有限元分析
研究了一种在KRISS上用作高压标准的GPa控制间隙活塞式压力计。在建立高压标准时,变形系数是最重要的参数之一,但不容易确定。使用Heydemann-Welch模型进行的常规分析在确定失速压力时会遇到问题,因为下降率相对于压力具有非线性特征。使用有限元分析(FEA)研究了一些计量特性,例如自由变形(FD)模式下的活塞-气缸总成的变形系数以及受控间隙(CC)模式下的夹套变形系数和失速压力。特别地,确定了在600MPa以上,立方下降率与夹套压力的关系变为非线性。通过与500 MPa压力标准和1 GPa的下降速率测量值进行比较,验证了FEA结果。最重要的参数是FD和CC模式下的失真系数,确定为(7.59±0.24)×10分别为-7 MPa -1和(3.35±0.39)×10 -7 MPa -1。当大约17%的外加压力用作夹套压力时,在FEA中获得零变形系数。该值类似于实验确定的约20%的结果。