Nihon kikai gakkai ronbunshu最新文献_第4页

Digital Tripletに基づく問題解決プロセスの逐次記述支援手法基于Digital Triplet的问题解决过程的顺序描述支援方法

Nihon kikai gakkai ronbunshu Pub Date : 2023-01-01 DOI: 10.1299/transjsme.23-00127

Satoshi SHIMMORI, Ai ITOU, Yasunori HAMA, Yasushi UMEDA

引用次数: 0

エレベータ据付におけるレール調整最適化手法の提案と効果の検証电梯安装中的轨道调整优化方法的提案和效果的验证

Nihon kikai gakkai ronbunshu Pub Date : 2023-01-01 DOI: 10.1299/transjsme.23-00101

Yutaka MARUYAMA, Yoshihiko NAKADA, Yasufumi TAKAKUSAKI, Yoshinobu ISHIKAWA

{"title":"エレベータ据付におけるレール調整最適化手法の提案と効果の検証","authors":"Yutaka MARUYAMA, Yoshihiko NAKADA, Yasufumi TAKAKUSAKI, Yoshinobu ISHIKAWA","doi":"10.1299/transjsme.23-00101","DOIUrl":"https://doi.org/10.1299/transjsme.23-00101","url":null,"abstract":"In the installation process of an elevator, work performs to correct the bending of the rail in order to suppress the lateral vibration of the car due to the irregularity of the guide rail. In this work, each rail bracket is adjusted so that the cutting edge of the rail is in the specified horizontal position with respect to the piano wire. However, since the rail is bent at the joint, irregularities remain even if the brackets are lined up in a straight line. Such a method cannot suppress the lateral vibration of the car and may worsen it. In this research, we proposed a method of optimizing the rail shape to minimize the vibration of the car based on a rail behavior model in that adjustment process and a car vibration model. The effect was verified in an experiment using an actual elevator. In the elevator system, large vibration had been occurred because the periodic excitation force determined by the running speed and rail bending period matched the natural frequency of the car. By adjusting the rails based on proposed method, we avoided resonance and reduced lateral vibration by 37%. This verification showed that the use of the proposed method enabled significant vibration reduction in a short period of time.","PeriodicalId":485601,"journal":{"name":"Nihon kikai gakkai ronbunshu","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136207891","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

ロボットの外装としたぬいぐるみの生地に滅菌処理を多数回施した影響の定量評価对作为机器人外壳的布偶面料进行多次灭菌处理的影响的定量评价

Nihon kikai gakkai ronbunshu Pub Date : 2023-01-01 DOI: 10.1299/transjsme.23-00128

Ken’ichi KOYANAGI, Kentaro NODA, Toru OSHIMA, Hiroyuki MASUTA, Takuya TSUKAGOSHI, Yoshimi KUWAKO, Naomi KIDANI

{"title":"ロボットの外装としたぬいぐるみの生地に滅菌処理を多数回施した影響の定量評価","authors":"Ken’ichi KOYANAGI, Kentaro NODA, Toru OSHIMA, Hiroyuki MASUTA, Takuya TSUKAGOSHI, Yoshimi KUWAKO, Naomi KIDANI","doi":"10.1299/transjsme.23-00128","DOIUrl":"https://doi.org/10.1299/transjsme.23-00128","url":null,"abstract":"When mascot suits or plush fabrics are used to cover a human-friendly robot, frequent sterilization may be required, depending on the use of the robot. However, the effects of such sterilization are not sufficiently understood. In this study, variations in the strength and color values of plush fabrics were measured and quantitatively evaluated following 50 cycles of sterilization by ethylene oxide gas (EOG). The fabrics were composed of boa fabric, which is commonly used in mascot suits and plush dolls, and cloth reinforced with polyurethane foam. The tensile strength and the elongation were measured by the tensile strength test for clothes or clothing seams, in accordance with the standard JISL1096. In terms of appearance, red-green-blue (RGB) color values were obtained from photographs taken under the same light conditions to evaluate the color tone. A friction test was used to evaluate the tactile sensation. These results showed that EOG sterilization did not notably affect the properties of the fabrics; however, a single cycle of autoclave sterilization degraded the fabrics. Notably, the boa fabric shrunk and hardened. Thus, EOG sterilization, which does not feature elevated temperatures, may be an effective sterilization approach for these materials.","PeriodicalId":485601,"journal":{"name":"Nihon kikai gakkai ronbunshu","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135448050","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

Improvement of resin fracture model for ultimately light design of Type 4 hydrogen tank 改进树脂断裂模型，最终实现4型氢气罐的轻量化设计

Nihon kikai gakkai ronbunshu Pub Date : 2023-01-01 DOI: 10.1299/transjsme.23-00224

Shinichiro TAKEMOTO, Nobuhiro YOSHIKAWA

{"title":"Improvement of resin fracture model for ultimately light design of Type 4 hydrogen tank","authors":"Shinichiro TAKEMOTO, Nobuhiro YOSHIKAWA","doi":"10.1299/transjsme.23-00224","DOIUrl":"https://doi.org/10.1299/transjsme.23-00224","url":null,"abstract":"A conservative design methodology which results in overweight winding of helical layer in Type 4 hydrogen tank has been employed since the rupture phenomena in the vicinity of metallic boss of the tank is too complicated to predict precise burst pressure. The complexity comes from both the meso-scale structure constituted by overlapped carbon fiber bundles and local bending deformation in the part. Authors have developed a meso-scale based methodology for precise prediction of the burst pressure of Type 4 hydrogen tank, where carbon fiber bundles and matrix resin are perfectly distinguished for modeling. We investigate resin fracture model for the improvement of burst pressure prediction initiated by the rupture in the vicinity of metallic boss, assuming the reinforcement by means of Automated CFRP Tape Placement to realize ultimately light design of the tank. Specimens representing meso-scopic structure in the part are manufactured and submitted to the three-point bending tests. Through the validation of meso-scale fracture simulations corresponding to the tests, we demonstrate compressive fracture model of resin is decisive for precise description of terminative fracture phenomena in bending test specimen.","PeriodicalId":485601,"journal":{"name":"Nihon kikai gakkai ronbunshu","volume":"57 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135448049","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

The pantograph contact force measurement method in overhead catenary system using sparse modelling 基于稀疏建模的架空接触网系统受电弓接触力测量方法

Nihon kikai gakkai ronbunshu Pub Date : 2023-01-01 DOI: 10.1299/transjsme.23-00176

Takayuki USUDA, Masaki TAKAHASHI, Yoshitaka YAMASHITA

{"title":"The pantograph contact force measurement method in overhead catenary system using sparse modelling","authors":"Takayuki USUDA, Masaki TAKAHASHI, Yoshitaka YAMASHITA","doi":"10.1299/transjsme.23-00176","DOIUrl":"https://doi.org/10.1299/transjsme.23-00176","url":null,"abstract":"In recent years, condition monitoring methods have been widely developed. Any failure of the overhead catenary system or pantographs will raise the long downtime of railway operation. Therefore, condition monitoring methods of pantograph failure is required with the overhead catenary system. Furthermore, wear mechanism of contact wire has not been clarified yet due to its complex kinematics between contact wire and pantographs. For preventing these failure efficiently and finding out the wear mechanism of contact wire, the authors have developed a method to measure contact forces of all pantographs during trains passing on sections with sensors installed on the catenary. In the developed method, the contact forces are measured from the sum of dropper forces, inertia force of the contact wire and vertical components of the tensile force of contact wire in measurement section. However, some difficult issues have been left in the method measuring the inertial force from contact wire acceleration at some measurement points. This paper proposes a method selecting effective measurement points of contact wire acceleration. LASSO regression, which is known as one of the sparse modelling technique, is applied to the proposed method so that suitable acceleration measuring points are selected to measure inertia force. The results obtained by the proposed method are shown using dynamic simulation data. It also reports that the proposed method is effective even when the measurement frequency is changed.","PeriodicalId":485601,"journal":{"name":"Nihon kikai gakkai ronbunshu","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135262043","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

工作物剛性の低下を伴うエンドミル加工における工作物変形挙動のモデル化随着工件刚度的降低，对终端磨机加工中的工件变形行为进行建模

Nihon kikai gakkai ronbunshu Pub Date : 2023-01-01 DOI: 10.1299/transjsme.23-00156

Koji TERAMOTO, Yutaro NAKAO, Yuya HIBINO

引用次数: 0

Derivation of the basic structures of orthogonally symmetric lattice structures and finite element analysis of their compressive properties 正交对称晶格结构基本结构的推导及其压缩性能的有限元分析

Nihon kikai gakkai ronbunshu Pub Date : 2023-01-01 DOI: 10.1299/transjsme.23-00213

Tomohisa KOJIMA, Yuta TAKASE, Tomoaki TSUJI

{"title":"Derivation of the basic structures of orthogonally symmetric lattice structures and finite element analysis of their compressive properties","authors":"Tomohisa KOJIMA, Yuta TAKASE, Tomoaki TSUJI","doi":"10.1299/transjsme.23-00213","DOIUrl":"https://doi.org/10.1299/transjsme.23-00213","url":null,"abstract":"With the recent development of additive manufacturing technology represented by 3D printers, various lattice structures have emerged because their mechanical properties can be designed artificially according to their structural characteristics. This study aims to develop knowledge that will contribute to the design of lattice structures with tailored and desired mechanical properties. Among the many unit cell topologies in the lattice structures that have been designed in numerous studies, there are several basic structures and a variety of additional structures that were derived from these basic structures. However, there is a degree of ambiguity as to which of these structures should be regarded as the basic structures. In this study, the basic structures of a lattice structure with orthogonal symmetry were derived by determining the edges of the struts using a mathematical combination approach. Then, the deformation characteristics of them were evaluated through elasto-plastic finite element analysis. Five basic structures were determined by designing the unit cell of the lattice structure such that the struts pass through the vertices, the midpoints of the edges, and the centers of the faces in the cubic design region. It was found that structures with the same strut directions in their unit cells have similar stiffness distributions, and the basic structures obtained can be classified accordingly into three types. Finite element analysis of the compression of a micro-lattice structure composed of these basic structures confirmed that different deformation characteristics appeared during plastic collapse for each type of classified basic structure, and that the strut deformation type determined the overall deformation characteristics. Evaluation of the stiffness and the plastic collapse stress showed that with stretch-dominant strut deformation, lattice structures can be made lighter in weight while still maintaining some stiffness and some plastic collapse stress.","PeriodicalId":485601,"journal":{"name":"Nihon kikai gakkai ronbunshu","volume":"85 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135505128","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

ピコ秒パルスレーザを使った超硬合金に対する精密微細加工（ゼロカットを併用した3次元微細加工法）使用皮秒脉冲激光器对超硬合金进行精密微加工(同时使用零切割的三维微加工法)

Nihon kikai gakkai ronbunshu Pub Date : 2023-01-01 DOI: 10.1299/transjsme.23-00138

Takuya SEMBA, Yoshifumi AMAMOTO, Takuma MIURA

{"title":"ピコ秒パルスレーザを使った超硬合金に対する精密微細加工（ゼロカットを併用した3次元微細加工法）","authors":"Takuya SEMBA, Yoshifumi AMAMOTO, Takuma MIURA","doi":"10.1299/transjsme.23-00138","DOIUrl":"https://doi.org/10.1299/transjsme.23-00138","url":null,"abstract":"A simulation technique adaptable to calculating a laser-machined profile was proposed to develop microfabrication techniques for a cemented carbide using a focused picosecond pulsed laser. An experiment to obtain a defocus diagram, which shows the relationship between defocus and removal depth, was conducted by shifting the focal point upward to the work surface. The concept of zero cut, in which the laser beam was scanned repeatedly in the same path, was proposed, and it was verified using the proposed simulation technique that zero cut is useful for residual stock removal. In addition, a simulation technique adaptable to calculating both the laser-machined profile and the machining process conditions was developed using the defocus diagram as a machining condition. It was verified through a machining test by fabricating half-cut columns with radii of 30 and 50 μm formed on the upper half of a large base column that the dimensional error of the columns was less than 1% and the surface roughness was less than 0.1 μmRz. This means that the simulation technique using the defocus diagram as a machining condition is useful for the microfabrication of the cemented carbide using the focused picosecond pulsed laser.","PeriodicalId":485601,"journal":{"name":"Nihon kikai gakkai ronbunshu","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136257180","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

一方向炭素繊維強化熱可塑性樹脂の異方性弾塑性挙動の観察と材料構成則（異方性降伏関数とゆがみ硬化則）一方向炭素繊维强化热可塑性树脂の异方性弾塑性挙动の観察と材料构成则（异方性降伏関数とゆがみ硬化则）

Nihon kikai gakkai ronbunshu Pub Date : 2023-01-01 DOI: 10.1299/transjsme.23-00201

Koji YAMAMOTO, Masato SOMEMIYA, Norio HIRAYAMA, Kenjiro TERADA

{"title":"一方向炭素繊維強化熱可塑性樹脂の異方性弾塑性挙動の観察と材料構成則（異方性降伏関数とゆがみ硬化則）","authors":"Koji YAMAMOTO, Masato SOMEMIYA, Norio HIRAYAMA, Kenjiro TERADA","doi":"10.1299/transjsme.23-00201","DOIUrl":"https://doi.org/10.1299/transjsme.23-00201","url":null,"abstract":"A series of numerical material tests based on homogenization theory are carried out to characterize the anisotropic elastoplastic and hardening behavior of thermoplastic resin reinforced in one direction by carbon fibers (UD-CFRTP), and a new constitutive model is proposed to describe the characteristic material behavior. First, macroscopic stress-strain curves are obtained from numerical material tests (NMTs) conducted on a unit cell model, i.e., a representative volume element of periodic microstructures, to which uniaxial and combined stress states are applied under various conditions of stress ratios and stress paths. Using the obtained NMTs results, the initial shape of the yield surface and its evolution are investigated in detail. The results suggest that even if a resin has isotopic hardening characteristics, UD-CFRTP exhibits complex anisotropic post-yielding or, equivalently, hardening behavior. Then, a constitutive model that can describe such material behavior is originally formulated, and a step-wise identification strategy is presented to determine the material parameters. Finally, by carrying out verification analyses, we confirmed that the macroscopic stress-strain curves represented by the proposed model can be fitted to those obtained by NMTs with sufficient accuracy for practical use and that the performance of the proposed model is much better than that of a conventional constitutive law.","PeriodicalId":485601,"journal":{"name":"Nihon kikai gakkai ronbunshu","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135267140","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

柱上高圧開閉器内部の消弧グリッドでの冷却現象の伝熱評価柱上高压开关内部消弧网格中冷却现象的传热评价

Nihon kikai gakkai ronbunshu Pub Date : 2023-01-01 DOI: 10.1299/transjsme.23-00055

Koutaro TSUBAKI, Akio SAITSU

{"title":"柱上高圧開閉器内部の消弧グリッドでの冷却現象の伝熱評価","authors":"Koutaro TSUBAKI, Akio SAITSU","doi":"10.1299/transjsme.23-00055","DOIUrl":"https://doi.org/10.1299/transjsme.23-00055","url":null,"abstract":"Focusing on the cooling of the arc splitter plate after arc generation in the pole mounted switchgears, the heat transfer phenomenon was clarified. Experiments were carried out on a pole mounted switchgears with load currents of 600 A and 800 A, and the heat transfer phenomenon was evaluated from the surface temperature of the iron arc splitter plate measured with a radiation thermometer. From the analysis results, it was found that the plate was cooled by forced convection due to the expansion of the air due to the arc for about 5 s after arc interruption, and then cooled by natural convection. Immediately after the start of the experiment (about 600 s from the start), the effect of the arc on the air is large, and the ratio of cooling by forced convection to total cooling amount is about 0.5 to 0.75. When the melting area of the iron arc splitter plate increases, the ratio of heat transfer rate by forced convection becomes about 0.3 to 0.55. In addition, after the experiment with a load current of 800 A, it was confirmed that the iron arc splitter plate melted and melted down over a wide area. It is thought that at a load current of 600 A, the melting area of the iron arc splitter plate was small enough to melt down, but at 800 A, when the arc energy increased, the melting area of the iron arc splitter plate increased and melted down. It was clarified that the heat transfer phenomenon in the arc-extinguishing plate is affected by melting.","PeriodicalId":485601,"journal":{"name":"Nihon kikai gakkai ronbunshu","volume":"108 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136207680","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