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Numerical Simulation of Hydrodynamic Co-efficient of Underwater Gliders 水下滑翔机水动力系数的数值模拟
力学研究 Pub Date : 2023-01-01 DOI: 10.12677/ijm.2023.121002
绪 刘
{"title":"Numerical Simulation of Hydrodynamic Co-efficient of Underwater Gliders","authors":"绪 刘","doi":"10.12677/ijm.2023.121002","DOIUrl":"https://doi.org/10.12677/ijm.2023.121002","url":null,"abstract":"The numerical simulation of the vertical and longitudinal hydrodynamic coefficient test of the three-dimensional rotary ellipsoid was carried out by using the three-dimensional Navier-Stokes equation, and the numerical simulation of the transverse and bow swing test of the SUBOFF model submarine was further carried out on this basis. The motion forms of the underwater glider hanging, longitudinal, transverse and bow rocking experiments are analyzed, and the corresponding mathematical equations are derived, and the numerical prediction simulation of the hydrodynamic coefficient of the underwater glider is carried out. The results show that the calculation results of the numerical simulation method of hydraulic coefficient of underwater gliders developed in this","PeriodicalId":67940,"journal":{"name":"力学研究","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66106952","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Direct Method for Smooth Solitary Waves of Non-Zero Asymptotic Values of the Modified CH Equation 修正CH方程非零渐近值光滑孤波的直接解法
力学研究 Pub Date : 2022-01-01 DOI: 10.12677/ijm.2022.113008
叠 彭
{"title":"Direct Method for Smooth Solitary Waves of Non-Zero Asymptotic Values of the Modified CH Equation","authors":"叠 彭","doi":"10.12677/ijm.2022.113008","DOIUrl":"https://doi.org/10.12677/ijm.2022.113008","url":null,"abstract":"This paper focuses on the non-zero asymptotic value of the smooth solitary wave of the mCH equation and directly gives the explicit expression of the solitary wave solution through the analysis of the planar dynamical system.","PeriodicalId":67940,"journal":{"name":"力学研究","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66106740","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Research on Turbulent Boundary Layer Drag Reduction Characteristics of Non-Uniform Spring Array Supported Skin 非均匀弹簧阵列支撑蒙皮湍流边界层减阻特性研究
力学研究 Pub Date : 2022-01-01 DOI: 10.12677/ijm.2022.113006
俊东 魏
{"title":"Research on Turbulent Boundary Layer Drag Reduction Characteristics of Non-Uniform Spring Array Supported Skin","authors":"俊东 魏","doi":"10.12677/ijm.2022.113006","DOIUrl":"https://doi.org/10.12677/ijm.2022.113006","url":null,"abstract":"Based on the drag reduction technology of flexible skin, a skin structure supported by non-uniform","PeriodicalId":67940,"journal":{"name":"力学研究","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66106671","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Numerical Simulation of Three-Dimensional Stress Intensity Factor of Cracked Pipe Structure 裂纹管结构三维应力强度因子的数值模拟
力学研究 Pub Date : 2022-01-01 DOI: 10.12677/ijm.2022.114010
启濠 钟
{"title":"Numerical Simulation of Three-Dimensional Stress Intensity Factor of Cracked Pipe Structure","authors":"启濠 钟","doi":"10.12677/ijm.2022.114010","DOIUrl":"https://doi.org/10.12677/ijm.2022.114010","url":null,"abstract":"The stress intensity factor is very important to the safety evaluation of cracked pipe structures, and it is very hard to obtain the theoretical solution for part-through cracks, so numerical simulation is always employed to obtain the approximate solution. The present paper shows the numerical modeling approach for the three-dimensional stress intensity factor of pipe structure with ANSYS software, and the cracked straight pipe is employed to verify the accuracy and feasibility of the proposed approach. The influence of parameters on the three-dimensional stress intensity factor of elbow pipe structure with a part-through crack was investigated. The influence of depth and length of axial and radial part-through cracks on stress intensity factor was analyzed. The numerical simulation approach of the three-dimensional stress intensity factor proposed in this paper could be used for calculating and evaluating the stress intensity factor of other engineering structures.","PeriodicalId":67940,"journal":{"name":"力学研究","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66106793","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Numerical Study on the Effect of Temperature on the Mechanical Properties of Aluminum Foam Sandwich Shells 温度对泡沫铝夹层壳力学性能影响的数值研究
力学研究 Pub Date : 2022-01-01 DOI: 10.12677/ijm.2022.111003
文科 鲁
{"title":"Numerical Study on the Effect of Temperature on the Mechanical Properties of Aluminum Foam Sandwich Shells","authors":"文科 鲁","doi":"10.12677/ijm.2022.111003","DOIUrl":"https://doi.org/10.12677/ijm.2022.111003","url":null,"abstract":"","PeriodicalId":67940,"journal":{"name":"力学研究","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66106328","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Thermal Stress Analysis and Optimal Design of Large-Scale Nb3Sn Composite Superconducting Coils 大型Nb3Sn复合超导线圈的热应力分析及优化设计
力学研究 Pub Date : 2022-01-01 DOI: 10.12677/ijm.2022.114012
栋 田
{"title":"Thermal Stress Analysis and Optimal Design of Large-Scale Nb3Sn Composite Superconducting Coils","authors":"栋 田","doi":"10.12677/ijm.2022.114012","DOIUrl":"https://doi.org/10.12677/ijm.2022.114012","url":null,"abstract":"Since each material in the Nb 3 Sn superconducting wire has a different coefficient of thermal expansion, the Nb 3 Sn superconducting coil will generate a certain amount of thermal strain during the process from high-temperature treatments and molding to low-temperature operation. When it is exposed to a transport current, it will also be subjected to Lorentz force under the action of the self-field, thus generating a large mechanical deformation. Since Nb 3 Sn superconducting materials have high strain sensitivity and the strain generated in the superconducting wire affects the stability of the superconducting magnets, it is of scientific importance to calculate the mechanical behavior of superconducting magnets under thermal stress and electromagnetic body force. In this paper, based on the bidirectional homogenization method, finite element software is used to first analyze the variations of stress-strain of each material with the number of turns and layers under thermal stress in Nb 3 Sn coils. Secondly, by changing the number of Nb 3 Sn core wires, the size of Nb 3 Sn core wires and the diameter of the copper base in the superconducting wires, the stress and strain of each material with the copper excess ratio were analyzed. When the number of core wires is larger, the size of the core wires is larger or the diameter of the copper base is smaller. Thus, it provides a tool to optimize the design of superconducting coils structure in terms of mechanical properties. Finally, we consider the developments of stress and strain of each material in the superconducting coil under the combined effect of thermal stress and electromagnetic force.","PeriodicalId":67940,"journal":{"name":"力学研究","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66106918","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
General Solution of Elastic Mechanics for Orthotropic Materials 正交各向异性材料弹性力学通解
力学研究 Pub Date : 2022-01-01 DOI: 10.12677/ijm.2022.113007
普荣 贾
{"title":"General Solution of Elastic Mechanics for Orthotropic Materials","authors":"普荣 贾","doi":"10.12677/ijm.2022.113007","DOIUrl":"https://doi.org/10.12677/ijm.2022.113007","url":null,"abstract":"The investigation of the mechanic property for orthotropic materials must be of great significance for the design procedure and engineering application of composite constructions. According to the constitutive relations of the orthotropic materials, the","PeriodicalId":67940,"journal":{"name":"力学研究","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66106684","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Large Deformation of a Rod with Compress and Bending Moment Load Using Accurate Geometric Model 基于精确几何模型的压缩弯矩载荷下杆的大变形研究
力学研究 Pub Date : 2022-01-01 DOI: 10.12677/ijm.2022.111001
丹娅 王
{"title":"Large Deformation of a Rod with Compress and Bending Moment Load Using Accurate Geometric Model","authors":"丹娅 王","doi":"10.12677/ijm.2022.111001","DOIUrl":"https://doi.org/10.12677/ijm.2022.111001","url":null,"abstract":"","PeriodicalId":67940,"journal":{"name":"力学研究","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66106115","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Study on the Noise Reduction of High-Speed Train Pantograph Head 高速列车受电弓头部降噪研究
力学研究 Pub Date : 2022-01-01 DOI: 10.12677/ijm.2022.112005
丹丹 倪
{"title":"Study on the Noise Reduction of High-Speed Train Pantograph Head","authors":"丹丹 倪","doi":"10.12677/ijm.2022.112005","DOIUrl":"https://doi.org/10.12677/ijm.2022.112005","url":null,"abstract":"","PeriodicalId":67940,"journal":{"name":"力学研究","volume":"132 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66106570","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Inversion Analysis and Application of Initial Geostress Field Based on Finite Element Analysis and Multivariate Regression 基于有限元和多元回归的初始地应力场反演分析及应用
力学研究 Pub Date : 2022-01-01 DOI: 10.12677/ijm.2022.114009
萍 石
{"title":"Inversion Analysis and Application of Initial Geostress Field Based on Finite Element Analysis and Multivariate Regression","authors":"萍 石","doi":"10.12677/ijm.2022.114009","DOIUrl":"https://doi.org/10.12677/ijm.2022.114009","url":null,"abstract":"Based on the engineering geological conditions and measured geostress data of the Linglong Gold Mine, this paper uses the finite element and multivariate regression analysis method to carry out the regression inversion analysis of the initial geostress field in the specific region of the mine. Firstly, the finite element model of the study area was established using the aerial photography data, and the stress distribution of various setting conditions was obtained by the three-dimensional finite element analysis method. Then, using the multivariate regression analysis method with iterative refinement, the optimal regression coefficient is obtained, and the initial three-dimensional regression analysis model of geostress field is determined. Finally, according to the results of inversion analysis, the influencing factors on the initial ground stress distribution are discussed. Through the comparison be-tween computed and measured geostress values of measuring points, it can be determined that the two values are identical in magnitude and close in direction, indicating that the measured geostress field obtained by regression is reasonable, and can reflect the initial measured geostress field in the designated area of the gold mine more accurately, which provides a useful tool for the prediction and protection of rock burst disaster during the gold mine excavation.","PeriodicalId":67940,"journal":{"name":"力学研究","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66106751","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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