Transactions of the JSME (in Japanese)最新文献_第9页

An assessment of ultrasound transmission gel as trial bioink by pneumatic extrusion-based 3D bio-printer 基于气动挤压的3D生物打印机对超声透射凝胶作为试验生物墨水的评估

Transactions of the JSME (in Japanese) Pub Date : 1900-01-01 DOI: 10.1299/transjsme.21-00151

T. Hananouchi, Rentaro Matsuoka, Ryota Aoki, Takahiro Morita, S. Sakai

引用次数: 0

切削摩擦加工材の疲労特性に及ぼす負荷形式の影響负载形式对切削摩擦加工材料的疲劳特性的影响

Transactions of the JSME (in Japanese) Pub Date : 1900-01-01 DOI: 10.1299/transjsme.23-00027

Terutoshi Yakushiji, Dai Akamine, Tsubasa Tokuzumi, K. Takeo, Masahiro Goto

引用次数: 0

A proposal for a nonlinear Kalman filter using state dependent linear representation system and its performance analysis by numerical simulations 提出了一种基于状态相关线性表示系统的非线性卡尔曼滤波器，并通过数值仿真对其性能进行了分析

Transactions of the JSME (in Japanese) Pub Date : 1900-01-01 DOI: 10.1299/transjsme.20-00387

Nozomu Araki, N. Kawaguchi, Takao Sato, Y. Konishi

引用次数: 0

Simulation analyses of progress process of rail corrugation 钢轨波纹成形过程仿真分析

Transactions of the JSME (in Japanese) Pub Date : 1900-01-01 DOI: 10.1299/JSMETLD.2018.27.3206

M. Aboshi, Hirofumi Tanaka

{"title":"Simulation analyses of progress process of rail corrugation","authors":"M. Aboshi, Hirofumi Tanaka","doi":"10.1299/JSMETLD.2018.27.3206","DOIUrl":"https://doi.org/10.1299/JSMETLD.2018.27.3206","url":null,"abstract":"Rail corrugation is such phenomenon that roughness patterns of approximately regular wavelengths are formed on the rail running surface by trains running, and cause the vibration and the noise. In the previous papers of ours, we have already explained the growth mechanism and the wavelength determination mechanism of the rail corrugation from the dynamic point of view and verified their validity by comparing them with the field data. In this paper, we report the results of simulation analyses of the characteristics of each step of formation, growth and saturation of the rail corrugation using a discrete elastic support model close to the actual track. As a result of the simulation, the following are comfirmed : (1) at the formation step, by providing a minute and irregular wheel load fluctuation, rail surface roughnesses are formed with such wavelengths that their amplification factor of roughness amplitude is maximal and greater than 1.0. (2) at the growth step, as the contact length of the wheel / rail becomes longer, growth of roughness of the short wavelength is suppressed. (3) at the saturation step, when the roughness amplitude increases and the wheel loses the contact with the rail, the growth is suppressed and the roughness amplitude saturates. Based on these results, we present the progress process of the rail corrugation and the ways to approach the countermeasures.","PeriodicalId":341040,"journal":{"name":"Transactions of the JSME (in Japanese)","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124542832","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: 3

Liquid-solid contact behavior of a minute liquid droplet impinging on a hot solid surface 微小液滴撞击热固体表面的液固接触行为

Transactions of the JSME (in Japanese) Pub Date : 1900-01-01 DOI: 10.1299/transjsme.21-00278

Hayato Tajima, Yusuke Kobayashi, Kunito Okuyama

{"title":"Liquid-solid contact behavior of a minute liquid droplet impinging on a hot solid surface","authors":"Hayato Tajima, Yusuke Kobayashi, Kunito Okuyama","doi":"10.1299/transjsme.21-00278","DOIUrl":"https://doi.org/10.1299/transjsme.21-00278","url":null,"abstract":"The dynamic contact behavior of a minute liquid droplet upon the collision with a high temperature solid is investigated using total internal reflection imaging. An inkjet water droplet collides with a high temperature surface of sapphire and quartz glass prisms then splashes away. Contact behaviors captured from back using a nanosecond lighting stroboscope vary dramatically with the contact temperature Tc based on the heat conduction theory rather than the solid temperature Ts and are classified into four regions, (I) film evaporation, (II) nucleate boiling, (III) spontaneous nucleation and (IV) supercritical state regions. Contact area decreases significantly in the region (II) to show a minimum at a temperature close to the limit of liquid superheat, then increases in the region (III) to reach a maximum at a temperature close to the critical temperature before decreasing at higher temperatures. Even at a contact temperature so high as to exceed the critical temperature, liquid still contacts the solid surface over a significant area for several microseconds before drying up of the surface. The fine bubbles generated due to spontaneous nucleation hinders the contact due to the formation of the local dried area as the contact temperature approaches the superheat limit, whereas the contact is rather enhanced at further higher temperatures due to the dynamic action of spontaneous nucleation. Similar behaviors are observed for the quartz glass prism in the same range of the contact temperature.","PeriodicalId":341040,"journal":{"name":"Transactions of the JSME (in Japanese)","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124090907","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 identification of modal parameters of turbomachinery blade and impeller 涡轮机械叶片和叶轮模态参数辨识研究

Transactions of the JSME (in Japanese) Pub Date : 1900-01-01 DOI: 10.1299/jsmedmc.2019.607

Y. Kaneko, K. Mori, Furukawa Tatsuya

{"title":"Study on identification of modal parameters of turbomachinery blade and impeller","authors":"Y. Kaneko, K. Mori, Furukawa Tatsuya","doi":"10.1299/jsmedmc.2019.607","DOIUrl":"https://doi.org/10.1299/jsmedmc.2019.607","url":null,"abstract":"To develop turbomachinery blades with high reliability, it is indispensable to verify the natural frequency, the damping, the resonant stress, etc. under operating condition, and utilize these data in the mechanical design of a new blade. BTT (Blade Tip Timing) and the telemetry system have been widely used to measure the modal parameters of turbomachinery blades. In measurement of the modal parameters of blades in rotation, it is well known that the mistuning phenomena make the identification of modal parameters difficult. Namely, because, in a mistuned bladed disk, responses of many vibration modes are superimposed, it becomes difficult to correctly identify the natural frequency and the damping of each vibration mode. This is one of the critical issues to be overcome for developing blades with high reliability. Recently LSCF(Least-Squares Complex Frequency-Domain)method has been proposed as an effective method for identifying the modal parameters from complicated frequency responses. This method was also applied to derive the modal parameters of a bladed disk from the frequency responses expressed by travelling wave coordinates. In this paper, the validity of the LSCF method is verified by numerical simulations, where the modal parameters of mistuned bladed disks are identified from the frequency responses consisting of many vibration modes. In addition, the accuracy of the conventional half power method used in identifying the blade damping is researched.","PeriodicalId":341040,"journal":{"name":"Transactions of the JSME (in Japanese)","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127612068","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: 1

Development of MEMS-based micro-force measurement system with zero-compliance mechanism 基于mems的零柔度微力测量系统的研制

Transactions of the JSME (in Japanese) Pub Date : 1900-01-01 DOI: 10.1299/transjsme.21-00122

R. Monjiyama, T. Mizuno, Y. Ishino, M. Takasaki

引用次数: 0

Modeling of occupant behavior under lateral vehicle motion (Proposing of model that calculate posture control joint torque and seat reaction force separately and experimental validation) 车辆横向运动下乘员行为建模(提出分别计算姿态控制关节扭矩和座椅反作用力的模型并进行实验验证)

Transactions of the JSME (in Japanese) Pub Date : 1900-01-01 DOI: 10.1299/transjsme.22-00259

T. Yasui, H. Sugiura, Masateru Amano, E. Ono

引用次数: 0

Investigation of Integration of Polishing Motion Using Servo Internal Information with a Cooperative Robot and In-process Information of Rough Endmilling 基于伺服内部信息的协同机器人抛光运动与粗铣加工过程信息集成研究

Transactions of the JSME (in Japanese) Pub Date : 1900-01-01 DOI: 10.1299/transjsme.22-00091

Takamasa Yamamoto, Ryo Matsuda, Masatoshi Shindou, T. Hirogaki, E. Aoyama

引用次数: 0

Study on a method for estimating acoustic natural frequency of one dimensional sound field partitioned by perforated plate 多孔板分割一维声场声固有频率估算方法的研究

Transactions of the JSME (in Japanese) Pub Date : 1900-01-01 DOI: 10.1299/transjsme.19-00016

K. Ishihara, S. Kudo

{"title":"Study on a method for estimating acoustic natural frequency of one dimensional sound field partitioned by perforated plate","authors":"K. Ishihara, S. Kudo","doi":"10.1299/transjsme.19-00016","DOIUrl":"https://doi.org/10.1299/transjsme.19-00016","url":null,"abstract":"Abstract A perforated plate is used as an acoustic absorption material for compressors and acoustic barriers for roads and railways. The effects of the perforated plate on the acoustic natural frequency of an one dimensional sound field partitioned with the perforated plate has been studied in our previous investigations. And it was clarified that the acoustic natural frequency of the one dimensional sound field partitioned with the perforated plate becomes lower as the aperture ratio becomes smaller. There are two methods obtaining the acoustic natural frequencies. One is the method based on the eigenvalue analysis. And the other is the one based on the peak frequency of the response analysis. In this paper, the impedance derived by Melling is used for the response analysis. we compared two acoustic natural frequencies calculated by different two methods. As a result, it was clarified that the acoustic natural frequency calculated by the response analysis was a little smaller than that calculated by the eigenvalue analysis in all conditions. But its difference is small, and both the acoustic natural frequencies calculated by two methods agree with experimental results. And it has become easier to physically understand the analytical and experimental results by considering and comparing the element of transfer matrix.","PeriodicalId":341040,"journal":{"name":"Transactions of the JSME (in Japanese)","volume":"89 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126306706","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