Researched on the Character of Performance Test for a Type of Energy Absorbing Assembly and Mathematic Analysis Model

Author(s):  
Ruirong Zhu ◽  
Bingbing Liang ◽  
Keqi Pan ◽  
Xinyu Yuan

It is the key point for the design and analysis of the energy absorbing assemblies in the whole R&D process of pipe whip restraint. An adequate and reasonable energy absorbing assembly design could guarantee the restraint function and control the reaction loads on the structure. Consequently, the performance character curve for the energy absorbing assembly is necessary and important. In this paper, researches are made to obtain the test and analysis method for the energy absorbing assembly. And the method is used to modify the design and release the load on structure to the extent of possible.

Sensi Journal ◽  
2020 ◽  
Vol 6 (2) ◽  
pp. 236-246
Author(s):  
Ilamsyah Ilamsyah ◽  
Yulianto Yulianto ◽  
Tri Vita Febriani

The right and appropriate system of receiving and transferring goods is needed by the company. In the process of receiving and transferring goods from the central warehouse to the branch warehouse at PDAM Tirta Kerta Raharja, Tangerang Regency, which is currently done manually is still ineffective and inaccurate because the Head of Subdivision uses receipt documents, namely PPBP and mutation of goods, namely MPPW in the form of paper as a submission media. The Head of Subdivision enters the data of receipt and mutation of goods manually and requires a relatively long time because at the time of demand for the transfer of goods the Head of Subdivision must check the inventory of goods in the central warehouse first. Therefore, it is necessary to hold a design of information systems for the receipt and transfer of goods from the central warehouse to a web-based branch warehouse that is already database so that it is more effective, efficient and accurate. With the web-based system of receiving and transferring goods that are already datatabed, it can facilitate the Head of Subdivision in inputing data on the receipt and transfer of goods and control of stock inventory so that the Sub Head of Subdivision can do it periodically to make it more effective, efficient and accurate. The method of data collection is done by observing, interviewing and studying literature from various previous studies, while the system analysis method uses the Waterfall method which aims to solve a problem and uses design methods with visual modeling that is object oriented with UML while programming using PHP and MySQL as a database.


2020 ◽  
Vol 10 (2) ◽  
pp. 60-74
Author(s):  
Muhammad Syauqi Mubarok

This article aims to examine and describe the influence of guidance and counseling management on learning discipline. The method used in this research is descriptive analysis method using survey techniques. Data collection techniques that used are documentation studies and field studies. Moreover, the data analysis technique that has been used to answer the research hypothesis is statistical analysis with a path analysis model. The location of the study was at the Ciledug Vocational High School Al-Musaddadiyah Garut, with 85 respondents taking part in the survey. The results of the discussion show that guidance and counseling management has a positive and significant effect on the discipline of learning


2011 ◽  
Vol 50-51 ◽  
pp. 728-732
Author(s):  
Ping Li ◽  
Ming Ying Zhuo ◽  
Li Chao Feng ◽  
Rui Zhang

Non-performance loan ratio is one of the important assessment criteria of the security of credit assets. It is also an important financial indicator to evaluate the general strength of commercial banks. Using principal component analysis method and statistical software SPSS16.0 and based on the non-performance loan ratio and relative data of some commercial banks in China in 2007, this paper provided a principal component analysis model for the non-performance loan ratio of China’s commercial banks. The factors that affect the non-performance loan ratio were refined in this paper. Finally, the characteristics of effect factors of each bank were analyzed and compared in detail.


2015 ◽  
Vol 12 (04) ◽  
pp. 1540006 ◽  
Author(s):  
C. Jiang ◽  
J. Zheng ◽  
B. Y. Ni ◽  
X. Han

This paper proposes a probability-interval mixed uncertainty model considering parametric correlations and a corresponding structural reliability analysis method. First of all, we introduce the sample correlation coefficients to express the correlations between different kinds of uncertain variables including probability and interval variables. Then dependent parameters are transformed into independent ones through a matrix transformation. A reliability analysis model is put forward, and an efficient method is built to obtain the reliability index or failure probability interval of the structure. Finally, four numerical examples are provided to verify the validity of the method.


2013 ◽  
Vol 732-733 ◽  
pp. 52-56
Author(s):  
Zhi Guo Wang ◽  
Lei Zhang ◽  
Chai Ling Yin

Cryogenic separation method is the main method to recycle NGL (Natural Gas Liquid). Oilfield two-stage expansion NGL cryogenic separation plant is a complex system composed of varieties of material flow, energy flow and equipments, is a typical distributed energy use system composed of three parts, energy supply, energy use and waste heat recovery. In this paper, according to the process characteristics of two-stage expansion cryogenic separation plant, three-box analysis method was used, the system was compartmentalized into six subsystems, represented the exergy analysis model of system—unit—equipment, given the specific analysis process and the assessment rules for the NGL system. Using the practical operational data, the writers conduct the exergy analysis on the operational working condition of Daqing oilfield NGL system. Based on the calculation results, this paper raises some proposals to improve the operational efficiency, and achieved a good energy saving effect in engineering practice.


2013 ◽  
Vol 333-335 ◽  
pp. 2448-2451
Author(s):  
Yong Li ◽  
Guang Ma ◽  
Yun De Shen ◽  
Tai Hong Cheng ◽  
Zhen Zhe Li ◽  
...  

To meet the needs of test for compound oscillatory roller transmission (CORT) reducer, A comprehensive test system for precision transmission performance was designed, the test-bed structure and control principal of which were introduced. First, a transmission performance test method was proposed and focused on the transmission performance of velocity ratio, accuracy, and efficiency. Then, user interface based on LabVIEW program was designed, and the transmission performance of torque, angle, velocity, velocity ratio, return difference, efficiency could be displayed. Finally, measurement example on an E80 type CORT reducer has been made, and shows that the proposed test system is suitable for test for these reducers of high-precision drive, high stiffness, high load characteristics.


2018 ◽  
Vol 17 (1) ◽  
pp. 71-86
Author(s):  
Mohd Anuar Ramli ◽  
Ahmad Badri Abdullah ◽  
Muhammad Ikhlas Rosele

Islamic jurisprudence is a dynamic system. It is facilitated by some flexible methodologies. Nowadays, there are varieties of issues in Muslims’ societies that are results or implications of developments in science and technology, and also results of changes that happen in the structures of the societies. In order to face these realities, a contemporary integrative approach has to be applied in Islamic Law's research process. In accordance to this, this paper will elaborate the integrative approaches that try to unify and integrate theories in Islamic jurisprudence with social research methods. Basically, there are models that have been introduced by several Islamic thinkers that related to this integrative approach. For example the Islamization of sociology based on maslahah model, the Islamic Jurisprudence sociology model, the unified approach to textual and contextual analysis model. All of these models contain their own strength and weakness in their integrative approaches. This paper is trying to introduce an approach that integrates Islamic jurisprudence theories with the gender analysis method that is among social critics methods. This introduced method is to be used to analyze an issue in fiqh pertaining to polygamy that is always been debated nowadays and also to analyze the applicability of the practice in the social and contemporary conditions of our country. According to this research, social research methods are able to support Islamic jurisprudence in order to improve its research process and its results. Keywords: integrative approach, Islamic jurisprudence, social science, gender analysis, polygamy   Hukum Islam merupakan satu sistem dinamik yang dibangunkan berasaskan metodologi yang bersifat anjal. Pada hari ini, wujudnya pelbagai isu yang melanda masyarakat umat Islam kesan daripada perkembangan sains dan teknologi serta perubahan sosial yang berlaku dalam struktur masyarakat. Dalam usaha untuk berdepan dengan realiti ini, pendekatan integratif yang bersifat kontemporari perlu digunakan dalam proses penyelidikan hukum Islam. Justeru, artikel ini akan menjelaskan pendekatan integratif yang cuba menyatukan dan mengintegrasikan teori hukum Islam dengan kaedah penyelidikan sosial. Pada asasnya, terdapat model yang telah diperkenalkan oleh beberapa pemikir Islam berkaitan dengan pendekatan integratif ini. Sebagai contoh Islamisasi ilmu sosiologi berdasarkan model maslahah, model model sosiologi hukum Islam, model pendekatan bersepadu dalam analisis tekstual dan kontekstual. Semua model ini mengandungi kekuatan dan kelemahan dalam pendekatan integratif yang tersendiri. Lantaran itu, kajian ini cuba memperkenalkan satu pendekatan yang mengintegrasikan teori hukum Islam dengan kaedah analisis gender yang merupakan salah satu metodologi kritik sosial. Kaedah ini diperkenalkan untuk digunakan dalam menganalisis isu fiqh berkaitan poligami yang sentiasa menjadi perbahasan pada masa kini serta melihat kesesuaiannya dalam konteks sosial dan kemodenan negara ini. Kajian mendapati, kaedah penyelidikan sosial dapat menyokong kajian hukum Islam dalam usaha meningkatkan kualiti proses penyelidikan dan hasil dapatannya.   Kata kunci: Pendekatan integratif; hukum Islam; sains sosial; analisis gender; poligami


2021 ◽  
Vol 2021 ◽  
pp. 1-13
Author(s):  
Guodong Zhai ◽  
Xujie Qin ◽  
Xing Yang

As a renewable energy source, wind energy has received more and more attention, and the wind power industry has also been advocated and developed by countries all over the world. In the production and use of wind turbines, the design and manufacturing technology of wind turbine bearings is very important. In order to ensure the reliable operation of the wind power main bearing after installation and realize the longest life of it, this paper designs a bearing test bench that can test the performance of the wind power main bearing. It can analyze the temperature, displacement, load, and moment of the key parts of the 5 MW wind power main shaft bearing. The solid modeling of the experimental platform was carried out using the 3D modeling software SolidWorks. Hydraulic loading system and test monitoring system are designed to realize the drive and control of the test bench. Through the established mathematical model, the central load of the hub is converted into the axial cylinder load and the radial cylinder load of the test bench to simulate the actual working conditions of the tested bearing. The test results show that the test bench meets various loading requirements and can reliably complete the task of testing wind power main bearings.


2021 ◽  
Vol 7 (5) ◽  
pp. 2111-2126
Author(s):  
Yang Zhou ◽  
Cuimei Li

There is a problem of low accuracy in the analysis of the vibration of the numerical solution of the nonlinear operator equation. In this work, the vibration analysis equation is constructed by the step-by-step search method, and the vibration quadrant of the equation is divided by the dichotomy method. The vibration spectrum is determined by the iteration method, and the vibration analysis model of the numerical solution of the nonlinear operator equation is constructed. The vibration analysis of the numerical solution of the nonlinear operator equation is completed based on the solution of the model and the numerical calculation and display of the step-by-step Fourier. The experimental results show that the proposed method has higher accuracy than the traditional vibration analysis method, which meets the requirements of the vibration analysis of the numerical solution of nonlinear operator equation.


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